[Title 47 CFR ]
[Code of Federal Regulations (annual edition) - October 1, 1999 Edition]
[From the U.S. Government Printing Office]


          47



          Telecommunication



[[Page i]]

          PARTS 70 TO 79

                         Revised as of October 1, 1999

          CONTAINING
          A CODIFICATION OF DOCUMENTS
          OF GENERAL APPLICABILITY
          AND FUTURE EFFECT

          AS OF OCTOBER 1, 1999
          With Ancillaries
          Published by
          the Office of the Federal Register
          National Archives and Records
          Administration

          as a Special Edition of
          the Federal Register



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                     U.S. GOVERNMENT PRINTING OFFICE
                            WASHINGTON : 1999



               For sale by U.S. Government Printing Office
 Superintendent of Documents, Mail Stop: SSOP, Washington, DC 20402-9328



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                            Table of Contents



                                                                    Page
  Explanation.................................................       v

  Title 47:

          Chapter I--Federal Communications Commission 
          (Continued).........................................       3

  Finding Aids:

      Material Approved for Incorporation by Reference........     725

      Table of CFR Titles and Chapters........................     727

      Alphabetical List of Agencies Appearing in the CFR......     745

      Table of OMB Control Numbers............................     757

      List of CFR Sections Affected...........................     767



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                     ----------------------------

                     Cite this Code:  CFR
                     To cite the regulations in 
                       this volume use title, 
                       part and section number. 
                       Thus,  47 CFR 73.1 refers 
                       to title 47, part 73, 
                       section 1.

                     ----------------------------

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                               EXPLANATION

    The Code of Federal Regulations is a codification of the general and 
permanent rules published in the Federal Register by the Executive 
departments and agencies of the Federal Government. The Code is divided 
into 50 titles which represent broad areas subject to Federal 
regulation. Each title is divided into chapters which usually bear the 
name of the issuing agency. Each chapter is further subdivided into 
parts covering specific regulatory areas.
    Each volume of the Code is revised at least once each calendar year 
and issued on a quarterly basis approximately as follows:

Title 1 through Title 16.................................as of January 1
Title 17 through Title 27..................................as of April 1
Title 28 through Title 41...................................as of July 1
Title 42 through Title 50................................as of October 1

    The appropriate revision date is printed on the cover of each 
volume.

LEGAL STATUS

    The contents of the Federal Register are required to be judicially 
noticed (44 U.S.C. 1507). The Code of Federal Regulations is prima facie 
evidence of the text of the original documents (44 U.S.C. 1510).

HOW TO USE THE CODE OF FEDERAL REGULATIONS

    The Code of Federal Regulations is kept up to date by the individual 
issues of the Federal Register. These two publications must be used 
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    To determine whether a Code volume has been amended since its 
revision date (in this case, October 1, 1999), consult the ``List of CFR 
Sections Affected (LSA),'' which is issued monthly, and the ``Cumulative 
List of Parts Affected,'' which appears in the Reader Aids section of 
the daily Federal Register. These two lists will identify the Federal 
Register page number of the latest amendment of any given rule.

EFFECTIVE AND EXPIRATION DATES

    Each volume of the Code contains amendments published in the Federal 
Register since the last revision of that volume of the Code. Source 
citations for the regulations are referred to by volume number and page 
number of the Federal Register and date of publication. Publication 
dates and effective dates are usually not the same and care must be 
exercised by the user in determining the actual effective date. In 
instances where the effective date is beyond the cut-off date for the 
Code a note has been inserted to reflect the future effective date. In 
those instances where a regulation published in the Federal Register 
states a date certain for expiration, an appropriate note will be 
inserted following the text.

OMB CONTROL NUMBERS

    The Paperwork Reduction Act of 1980 (Pub. L. 96-511) requires 
Federal agencies to display an OMB control number with their information 
collection request.

[[Page vi]]

Many agencies have begun publishing numerous OMB control numbers as 
amendments to existing regulations in the CFR. These OMB numbers are 
placed as close as possible to the applicable recordkeeping or reporting 
requirements.

OBSOLETE PROVISIONS

    Provisions that become obsolete before the revision date stated on 
the cover of each volume are not carried. Code users may find the text 
of provisions in effect on a given date in the past by using the 
appropriate numerical list of sections affected. For the period before 
January 1, 1986, consult either the List of CFR Sections Affected, 1949-
1963, 1964-1972, or 1973-1985, published in seven separate volumes. For 
the period beginning January 1, 1986, a ``List of CFR Sections 
Affected'' is published at the end of each CFR volume.

INCORPORATION BY REFERENCE

    What is incorporation by reference? Incorporation by reference was 
established by statute and allows Federal agencies to meet the 
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to materials already published elsewhere. For an incorporation to be 
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effect of incorporation by reference is that the material is treated as 
if it were published in full in the Federal Register (5 U.S.C. 552(a)). 
This material, like any other properly issued regulation, has the force 
of law.
    What is a proper incorporation by reference? The Director of the 
Federal Register will approve an incorporation by reference only when 
the requirements of 1 CFR part 51 are met. Some of the elements on which 
approval is based are:
    (a) The incorporation will substantially reduce the volume of 
material published in the Federal Register.
    (b) The matter incorporated is in fact available to the extent 
necessary to afford fairness and uniformity in the administrative 
process.
    (c) The incorporating document is drafted and submitted for 
publication in accordance with 1 CFR part 51.
    Properly approved incorporations by reference in this volume are 
listed in the Finding Aids at the end of this volume.
    What if the material incorporated by reference cannot be found? If 
you have any problem locating or obtaining a copy of material listed in 
the Finding Aids of this volume as an approved incorporation by 
reference, please contact the agency that issued the regulation 
containing that incorporation. If, after contacting the agency, you find 
the material is not available, please notify the Director of the Federal 
Register, National Archives and Records Administration, Washington DC 
20408, or call (202) 523-4534.

CFR INDEXES AND TABULAR GUIDES

    A subject index to the Code of Federal Regulations is contained in a 
separate volume, revised annually as of January 1, entitled CFR Index 
and Finding Aids. This volume contains the Parallel Table of Statutory 
Authorities and Agency Rules. A list of CFR titles, chapters, and parts 
and an alphabetical list of agencies publishing in the CFR are also 
included in this volume.
    An index to the text of ``Title 3--The President'' is carried within 
that volume.
    The Federal Register Index is issued monthly in cumulative form. 
This index is based on a consolidation of the ``Contents'' entries in 
the daily Federal Register.
    A List of CFR Sections Affected (LSA) is published monthly, keyed to 
the revision dates of the 50 CFR titles.

[[Page vii]]


REPUBLICATION OF MATERIAL

    There are no restrictions on the republication of material appearing 
in the Code of Federal Regulations.

INQUIRIES

    For a legal interpretation or explanation of any regulation in this 
volume, contact the issuing agency. The issuing agency's name appears at 
the top of odd-numbered pages.
    For inquiries concerning CFR reference assistance, call 202-523-5227 
or write to the Director, Office of the Federal Register, National 
Archives and Records Administration, Washington, DC 20408.

SALES

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ELECTRONIC SERVICES

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site also contains links to GPO Access.

                              Raymond A. Mosley,
                                    Director,
                          Office of the Federal Register.

October 1, 1999.



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                               THIS TITLE

    Title 47--Telecommunication is composed of five volumes. The parts 
in these volumes are arranged in the following order: Parts 0-19, parts 
20-39, parts 40-69, parts 70-79, and part 80 to end, chapter I--Federal 
Communications Commission. The last volume, part 80 to end, also 
includes chapter II--Office of Science and Technology Policy and 
National Security Council, and chapter III--National Telecommunications 
and Information Administration, Department of Commerce. The contents of 
these volumes represent all current regulations codified under this 
title of the CFR as of October 1, 1999.

    Part 73 contains a numerical designation of FM broadcast channels 
(Sec. 73.201) and a table of FM allotments designated for use in 
communities in the United States, its territories, and possessions 
(Sec. 73.202). Part 73 also contains a numerical designation of 
television channels (Sec. 73.603) and a table of allotments which 
contain channels designated for the listed communities in the United 
States, its territories, and possessions (Sec. 73.606).

    The OMB control numbers for the Federal Communications Commission, 
appear in Sec. 0.408 of chapter I. For the convenience of the user 
Sec. 0.408 is reprinted in the Finding Aids section of the second 
through fifth volumes.

    A redesignation table appears in the Finding Aids section of the 
volume containing part 80 to end.

    For this volume, Shelley C. Featherson was Chief Editor. The Code of 
Federal Regulations publication program is under the direction of 
Frances D. McDonald, assisted by Alomha S. Morris.

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[[Page 1]]



                       TITLE 47--TELECOMMUNICATION




                   (This book contains parts 70 to 79)

-----------------------------------------------------------------------
                                                                    Part

Chapter I--Federal Communications Commission (Continued)....          73

[[Page 3]]




       CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (Continued)        



-----------------------------------------------------------------------

                 SUBCHAPTER C--BROADCAST RADIO SERVICES

Part                                                                Page
70-72           [Reserved]
73              Radio broadcast services....................           5
74              Experimental radio, auxiliary, special 
                    broadcast and other program 
                    distributional services.................         389
76              Multichannel video and cable television 
                    service.................................         522
78              Cable television relay service..............         686
79              Closed captioning of video programming......         716

Supplemental Publications:   

  Annual Reports of the Federal Communications Commission to Congress.

  Federal Communications Commission Reports of Orders and Decision.

  Communications Act of 1934 (with amendments and index thereto), Recap. 
Version May 1989.

Miscellaneous Publications:   

  Broadcast Operator Handbook, 1976 edition.

[[Page 5]]



                 SUBCHAPTER C--BROADCAST RADIO SERVICES



                         PARTS 70-72  [RESERVED]



PART 73--RADIO BROADCAST SERVICES--Table of Contents




                    Subpart A--AM Broadcast Stations

Sec.
73.1  Scope.
73.14  AM broadcast definitions.
73.21  Classes of AM broadcast channels and stations.
73.23  AM broadcast station applications affected by international 
          agreements.
73.24  Broadcast facilities; showing required.
73.25  Clear channels; Class A, Class B and Class D stations.
73.26  Regional channels; Class B and Class D stations.
73.27  Local channels; Class C stations.
73.28  Assignment of stations to channels.
73.29  Class C stations on regional channels.
73.30  Petition for authorization of an allotment in the 1605-1705 kHz 
          band.
73.31  Rounding of nominal power specified on applications.
73.33  Antenna systems; showing required.
73.35  Calculation of improvement factors.
73.37  Applications for broadcast facilities, showing required.
73.44  AM transmission system emission limitations.
73.45  AM antenna systems.
73.49  AM transmission system fencing requirements.
73.51  Determining operating power.
73.53  Requirements for authorization of antenna monitors.
73.54  Antenna resistance and reactance measurements.
73.57  Remote reading antenna and common point ammeters.
73.58  Indicating instruments.
73.61  AM directional antenna field strength measurements.
73.62  Directional antenna system tolerances.
73.68  Sampling systems for antenna monitors.
73.69  Antenna monitors.
73.72  Operating during the experimental period.
73.88  Blanketing interference.
73.99  Presunrise service authorization (PSRA) and Postsunset service 
          authorization (PSSA).
73.127  Use of multiplex transmission.
73.128  AM stereophonic broadcasting.
73.132  Territorial exclusivity.
73.150  Directional antenna systems.
73.151  Field strength measurements to establish performance of 
          directional antennas.
73.152  Modification of directional antenna data.
73.153  Field strength measurements in support of applications or 
          evidence at hearings.
73.154  AM directional antenna partial proof of performance 
          measurements.
73.157  Antenna testing during daytime.
73.158  Directional antenna monitoring points.
73.160  Vertical plane radiation characteristics, f(
                    Subpart A--AM Broadcast Stations



Sec. 73.1  Scope.

    This subpart contains those rules which apply exclusively to the AM 
broadcast service and are in addition to those rules in Subpart H which 
are common to all AM, FM and TV broadcast services, commercial and 
noncommercial.

[47 FR 8587, Mar. 1, 1982]



Sec. 73.14  AM broadcast definitions.

    AM broadcast band. The band of frequencies extending from 535 to 
1705 kHz.
    AM broadcast channel. The band of frequencies occupied by the 
carrier and the upper and lower sidebands of an AM broadcast signal with 
the carrier frequency at the center. Channels are designated by their 
assigned carrier frequencies. The 117 carrier frequencies assigned to AM 
broadcast stations begin at 540 kHz and progress in 10 kHz steps to 1700 
kHz. (See Sec. 73.21 for the classification of AM broadcast channels).
    AM broadcast station. A broadcast station licensed for the 
dissemination of radio communications intended to be received by the 
public and operated on a channel in the AM broadcast band.
    Amplitude modulated stage. The radio-frequency stage to which the 
modulator is coupled and in which the carrier wave is modulated in 
accordance with the system of amplitude modulation and the 
characteristics of the modulating wave.
    Amplitude modulator stage. The last amplifier stage of the 
modulating wave amplitude modulates a radio-frequency stage.
    Antenna current. The radio-frequency current in the antenna with no 
modulation.
    Antenna input power. The product of the square of the antenna 
current and the antenna resistance at the point where the current is 
measured.
    Antenna resistance. The total resistance of the transmitting antenna 
system at the operating frequency and at the point at which the antenna 
current is measured.
    Auxiliary facility. An auxiliary facility is an AM antenna tower(s) 
separate from the main facility's antenna tower(s), permanently 
installed at the same site or at a different location, from which an AM 
station may broadcast for short periods without prior Commission 
authorization or notice to

[[Page 10]]

the Commission while the main facility is not in operation (e.g., where 
tower work necessitates turning off the main antenna or where lightning 
has caused damage to the main antenna or transmission system) (See 
Sec. 73.1675).
    Blanketing. The interference which is caused by the presence of an 
AM broadcast signal of one volt per meter (V/m) or greater strengths in 
the area adjacent to the antenna of the transmitting station. The 1 V/m 
contour is referred to as the blanket contour and the area within this 
contour is referred to as the blanket area.
    Carrier-amplitude regulation (Carrier shift). The change in 
amplitude of the carrier wave in an amplitude-modulated transmitter when 
modulation is applied under conditions of symmetrical modulation.
    Combined audio harmonics. The arithmetical sum of the amplitudes of 
all the separate harmonic components. Root sum square harmonic readings 
may be accepted under conditions prescribed by the FCC.
    Critical directional antenna. An AM broadcast directional antenna 
that is required, by the terms of a station authorization, to be 
operated with the relative currents and phases within the antenna 
elements at closer tolerances of deviation than those permitted under 
Sec. 73.62 and observed with a high precision monitor capable of 
measuring these parameters.
    Critical hours. The two hour period immediately following local 
sunrise and the two hour period immediately preceding local sunset.
    Daytime. The period of time between local sunrise and local sunset.
    Effective field; Effective field strength. The root-mean-square 
(RMS) value of the inverse distance fields at a distance of 1 kilometer 
from the antenna in all directions in the horizontal plane. The term 
``field strength'' is synonymous with the term ``field intensity'' as 
contained elsewhere in this Part.
    Equipment performance measurements. The measurements performed to 
determine the overall performance characteristics of a broadcast 
transmission system from point of program origination at main studio to 
sampling of signal as radiated. (See Sec. 73.1590)
    Experimental period. the time between 12 midnight local time and 
local sunrise, used by AM stations for tests, maintenance and 
experimentation.
    Frequency departure. The amount of variation of a carrier frequency 
or center frequency from its assigned value.
    Incidental phase modulation. The peak phase deviation (in radians) 
resulting from the process of amplitude modulation.
    Input power. Means the product of the direct voltage applied to the 
last radio stage and the total direct current flowing to the last radio 
stage, measured without modulation.
    Intermittent service area. Means the area receiving service from the 
groundwave of a broadcast station but beyond the primary service area 
and subject to some interference and fading.
    Last radio stage. The radio-frequency power amplifier stage which 
supplies power to the antenna.
    Left (or right) signal. The electrical output of a microphone or 
combination of microphones placed so as to convey the intensity, time, 
and location of sounds originated predominately to the listener's left 
(or right) of the center of the performing area.
    Left (or right) stereophonic channel. The left (or right) signal as 
electrically reproduced in reception of AM stereophonic broadcasts.
    Main channel. The band of audio frequencies from 50 to 10,000 Hz 
which amplitude modulates the carrier.
    Maximum percentage of modulation. The greatest percentage of 
modulation that may be obtained by a transmitter without producing in 
its output, harmonics of the modulating frequency in excess of those 
permitted by these regulations. (See Sec. 73.1570)
    Maximum rated carrier power. The maximum power at which the 
transmitter can be operated satisfactorily and is determined by the 
design of the transmitter and the type and number of vacuum tubes or 
other amplifier devices used in the last radio stage.
    Model I facility. A station operating in the 1605-1705 kHz band 
featuring fulltime operation with stereo, competitive technical quality, 
10 kW daytime power, 1 kW nighttime power, non-directional antenna (or a 
simple

[[Page 11]]

directional antenna system), and separated by 400-800 km from other co-
channel stations.
    Model II facility. A station operating in the 535-1605 kHz band 
featuring fulltime operation, competitive technical quality, wide area 
daytime coverage with nighttime coverage at least 15% of the daytime 
coverage.
    Nighttime. The period of time between local sunset and local 
sunrise.
    Nominal power. The antenna input power less any power loss through a 
dissipative network and, for directional antennas, without consideration 
of adjustments specified in paragraphs (b)(1) and (b)(2) of Sec. 73.51 
of the rules. However, for AM broadcast applications granted or filed 
before June 3, 1985, nominal power is specified in a system of 
classifications which include the following values: 50 kW, 25 kW, 10 kW, 
5 kW, 2.5 kW, 1 kW, 0.5 kW, and 0.25 kW. The specified nominal power for 
any station in this group of stations will be retained until action is 
taken on or after June 3, 1985, which involves a change in the technical 
facilities of the station.
    Percentage modulation (amplitude)
    In a positive direction:

M = MAX-C  x  100
      ----------------
          c

    In a negative direction:

M = C-MIN  x  100
      ---------------
          c

Where:
    M = Modulation level in percent.
    MAX = Instantaneous maximum level of the modulated radio frequency 
envelope.
    MIN = Instantaneous minimum level of the modulated radio frequency 
envelope.
    C = (Carrier) level of radio frequency envelope without modulation.

    Plate modulation. The modulation produced by introduction of the 
modulating wave into the plate circuit of any tube in which the carrier 
frequency wave is present.
    Primary service area. Means the service area of a broadcast station 
in which the groundwave is not subject to objectionable interference or 
objectionable fading.
    Proof of performance measurements or antenna proof of performance 
measurements. The measurements of field strengths made to determine the 
radiation pattern or characteristics of an AM directional antenna 
system.
    Secondary service area. Means the service area of a broadcast 
station served by the skywave and not subject to objectionable 
interference and in which the signal is subject to intermittent 
variations in strength.
    Stereophonic channel. The band of audio frequencies from 50 to 
10,000 Hz containing the stereophonic information which modulates the 
radio frequency carrier.
    Stereophonic crosstalk. An undesired signal occurring in the main 
channel from modulation of the stereophonic channel or that occurring in 
the stereophonic channel from modulation of the main channel.
    Stereophonic pilot tone. An audio tone of fixed or variable 
frequency modulating the carrier during the transmission of stereophonic 
programs.
    Stereophonic separation. The ratio of the electrical signal caused 
in the right (or left) stereophonic channel to the electrical signal 
caused in the left (or right) stereophonic channel by the transmission 
of only a right (or left) signal.
    Sunrise and sunset. For each particular location and during any 
particular month, the time of sunrise and sunset as specified in the 
instrument of authorization (See Sec. 73.1209).
    White area. The area or population which does not receive 
interference-free primary service from an authorized AM station or does 
not receive a signal strength of at least 1 mV/m from an authorized FM 
station.

[47 FR 8587, Mar. 1, 1982, as amended at 47 FR 13164, Mar. 29, 1982; 47 
FR 13812, Apr. 1, 1982; 50 FR 18821, May 2, 1985; 50 FR 47054, Nov. 14, 
1985; 56 FR 64856, Dec. 12, 1991; 62 FR 51058, Sept. 30, 1997]



Sec. 73.21  Classes of AM broadcast channels and stations.

    (a) Clear channel. A clear channel is one on which stations are 
assigned to serve wide areas. These stations are protected from 
objectionable interference within their primary service areas and, 
depending on the class of station, their secondary service areas.

[[Page 12]]

Stations operating on these channels are classified as follows:
    (1) Class A station. A Class A station is an unlimited time station 
that operates on a clear channel and is designed to render primary and 
secondary service over an extended area and at relatively long distances 
from its transmitter. Its primary service area is protected from 
objectionable interference from other stations on the same and adjacent 
channels, and its secondary service area is protected from interference 
from other stations on the same channel. (See Sec. 73.182). The 
operating power shall not be less than 10 kW nor more than 50 kW. (Also 
see Sec. 73.25(a)).
    (2) Class B station. A Class B station is an unlimited time station 
which is designed to render service only over a primary service area. 
Class B stations are authorized to operate with a minimum power of 0.25 
kW (or, if less than 0.25 kW, an equivalent RMS antenna field of at 
least 141 mV/m at 1 km) and a maximum power of 50 kW, or 10 kW for 
stations that are authorized to operate in the 1605-1705 kHz band.
    (3) Class D station. A Class D station operates either daytime, 
limited time or unlimited time with nighttime power less than 0.25 kW 
and an equivalent RMS antenna field of less than 141 mV/m at one km. 
Class D stations shall operate with daytime powers not less than 0.25 kW 
nor more than 50 kW. Nighttime operations of Class D stations are not 
afforded protection and must protect all Class A and Class B operations 
during nighttime hours. New Class D stations that had not been 
previously licensed as Class B will not be authorized.
    (b) Regional Channel. A regional channel is one on which Class B and 
Class D stations may operate and serve primarily a principal center of 
population and the rural area contiguous thereto.

    Note: Until the North American Regional Broadcasting Agreement 
(NARBA) is terminated with respect to the Bahama Islands and the 
Dominican Republic, radiation toward those countries from a Class B 
station may not exceed the level that would be produced by an 
omnidirectional antenna with a transmitted power of 5 kW, or such lower 
level as will comply with NARBA requirements for protection of stations 
in the Bahama Islands and the Dominican Republic against objectionable 
interference.

    (c) Local channel. A local channel is one on which stations operate 
unlimited time and serve primarily a community and the suburban and 
rural areas immediately contiguous thereto.
    (1) Class C station. A Class C station is a station operating on a 
local channel and is designed to render service only over a primary 
service area that may be reduced as a consequence of interference in 
accordance with Sec. 73.182. The power shall not be less than 0.25 kW, 
nor more than 1 kW. Class C stations that are licensed to operate with 
0.1 kW may continue to do so.

[56 FR 64856, Dec. 12, 1991]



Sec. 73.23  AM broadcast station applications affected by international agreements.

    (a) Except as provided in paragraph (b) of this section, no 
application for an AM station will be accepted for filing if 
authorization of the facilities requested would be inconsistent with 
international commitments of the United States under treaties and other 
international agreements, arrangements and understandings. (See list of 
such international instruments in Sec. 73.1650(b)). Any such application 
that is inadvertently accepted for filing will be dismissed.
    (b) AM applications that involve conflicts only with the North 
American Regional Broadcasting Agreement (NARBA), but that are in 
conformity with the remaining treaties and other international 
agreements listed in Sec. 73.1650(b) and with the other requirements of 
this part 73, will be granted subject to such modifications as the FCC 
may subsequently find appropriate, taking international considerations 
into account.
    (c) In the case of any application designated for hearing on issues 
other than those related to consistency with international relationships 
and as to which no final decision has been rendered, whenever action 
under this section becomes appropriate because of inconsistency with 
international relationships, the applicant involved shall, 
notwithstanding the provisions Secs. 73.3522 and 73.3571, be permitted 
to

[[Page 13]]

amend its application to achieve consistency with such relationships. In 
such cases the provisions of Sec. 73.3605(c) will apply.
    (d) In some circumstances, special international considerations may 
require that the FCC, in acting on applications, follow procedures 
different from those established for general use. In such cases, 
affected applicants will be informed of the procedures to be followed.

[56 FR 64856, Dec. 12, 1991]



Sec. 73.24  Broadcast facilities; showing required.

    An authorization for a new AM broadcast station or increase in 
facilities of an existing station will be issued only after a 
satisfactory showing has been made in regard to the following, among 
others:
    (a) That the proposed assignment will tend to effect a fair, 
efficient, and equitable distribution of radio service among the several 
states and communities.
    (b) That a proposed new station (or a proposed change in the 
facilities of an authorized station) complies with the pertinent 
requirements of Sec. 73.37 of this chapter.
    (c) That the applicant is financially qualified to construct and 
operate the proposed station.
    (d) That the applicant is legally qualified. That the applicant (or 
the person or persons in control of an applicant corporation or other 
organization) is of good character and possesses other qualifications 
sufficient to provide a satisfactory public service.
    (e) That the technical equipment proposed, the location of the 
transmitter, and other technical phases of operation comply with the 
regulations governing the same, and the requirements of good engineering 
practice.
    (f) That the facilities sought are subject to assignment as 
requested under existing international agreements and the rules and 
regulations of the Commission.
    (g) That the population within the 1 V/m contour does not exceed 1.0 
percent of the population within the 25 mV/m contour: Provided, however, 
That where the number of persons within the 1 V/m contour is 300 or less 
the provisions of this paragraph are not applicable.
    (h) That, in the case of an application for a Class B or Class D 
station on a clear channel, the proposed station would radiate, during 
two hours following local sunrise and two hours preceding local sunset, 
in any direction toward the 0.1 mV/m groundwave contour of a co-channel 
United States Class A station, no more than the maximum value permitted 
under the provisions of Sec. 73.187.
    (i) That, for all stations, the daytime 5 mV/m contour encompasses 
the entire principal community to be served. That, for stations in the 
535-1605 kHz band, 80% of the principal community is encompassed by the 
nighttime 5 mV/m contour or the nighttime interference-free contour, 
whichever value is higher. That, for stations in the 1605-1705 kHz band, 
50% of the principal community is encompassed by the 5 mV/m contour or 
the nighttime interference-free contour, whichever value is higher. 
That, Class D stations with nighttime authorizations need not 
demonstrate such coverage during nighttime operation.
    (j) That the public interest, convenience, and necessity will be 
served through the operation under the proposed assignment.

[28 FR 13574, Dec. 14, 1963, as amended at 38 FR 5874, Mar. 5, 1973; 49 
FR 43960, Nov. 1, 1984; 50 FR 40014, Oct. 1, 1985; 52 FR 11654, Apr. 10, 
1987; 53 FR 1031, Jan. 15, 1988; 56 FR 64857, Dec. 12, 1991]



Sec. 73.25  Clear channels; Class A, Class B and Class D stations.

    The frequencies in the following tabulations are designated as clear 
channels and assigned for use by the Classes of stations given:
    (a) On each of the following channels, one Class A station may be 
assigned, operating with power of 50 kW: 640, 650, 660, 670, 700, 720, 
750, 760, 770, 780, 820, 830, 840, 870, 880, 890, 1020, 1030, 1040, 
1100, 1120, 1160, 1180, 1200, and 1210 kHz. In Alaska, these frequencies 
can be used by Class A stations subject to the conditions set forth in 
Sec. 73.182(a)(1)(ii). On the channels listed in this paragraph, Class B 
and Class D stations may be assigned.

[[Page 14]]

    (b) To each of the following channels there may be assigned Class A, 
Class B and Class D stations: 680, 710, 810, 850, 940, 1000, 1060, 1070, 
1080, 1090, 1110, 1130, 1140, 1170, 1190, 1500, 1510, 1520, 1530, 1540, 
1550, and 1560 kHz.

    Note: Until superseded by a new agreement, protection of the Bahama 
Islands shall be in accordance with NARBA. Accordingly, a Class A, Class 
B or Class D station on 1540 kHz shall restrict its signal to a value no 
greater than 5 V/m groundwave or 25 V/m-10% skywave at 
any point of land in the Bahama Islands, and such stations operating 
nighttime (i.e., sunset to sunrise at the location of the U.S. station) 
shall be located not less than 650 miles from the nearest point of land 
in the Bahama Islands.

    (c) Class A, Class B and Class D stations may be assigned on 540, 
690, 730, 740, 800, 860, 900, 990, 1010, 1050, 1220, 1540, 1570, and 
1580 kHz.

[28 FR 13574, Dec. 14, 1963, as amended at 33 FR 4410, Mar. 12, 1968; 35 
FR 18052, Nov. 25, 1970; 47 FR 27862, June 28, 1982; 49 FR 43960, Nov. 
1, 1984; 50 FR 24520, June 11, 1985; 52 FR 47568, Dec. 15, 1987; 53 FR 
1031, Jan. 15, 1988; 54 FR 39736, Sept. 28, 1989; 56 FR 64857, Dec. 12, 
1991]



Sec. 73.26  Regional channels; Class B and Class D stations.

    (a) The following frequencies are designated as regional channels 
and are assigned for use by Class B and Class D stations: 550, 560, 570, 
580, 590, 600, 610, 620, 630, 790, 910, 920, 930, 950, 960, 970, 980, 
1150, 1250, 1260, 1270, 1280, 1290, 1300, 1310, 1320, 1330, 1350, 1360, 
1370, 1380, 1390, 1410, 1420, 1430, 1440, 1460, 1470, 1480, 1590, 1600, 
1610, 1620, 1630, 1640, 1650, 1660, 1670, 1680, 1690, and 1700 kHz.
    (b) Additionally, in Alaska, Hawaii, Puerto Rico, and the U.S. 
Virgin Islands the frequencies 1230, 1240, 1340, 1400, 1450, and 1490 
kHz are designated as Regional channels, and are assigned for use by 
Class B stations. Stations formerly licensed to these channels in those 
locations as Class C stations are redesignated as Class B stations.

[56 FR 64857, Dec. 12, 1991]



Sec. 73.27  Local channels; Class C stations.

    Within the conterminous 48 states, the following frequencies are 
designated as local channels, and are assigned for use by Class C 
stations: 1230, 1240, 1340, 1400, 1450, and 1490 kHz.

[56 FR 64857, Dec. 12, 1991]



Sec. 73.28  Assignment of stations to channels.

    (a) The Commission will not make an AM station assignment that does 
not conform with international requirements and restrictions on spectrum 
use that the United States has accepted as a signatory to treaties, 
conventions, and other international agreements. See Sec. 73.1650 for a 
list of pertinent treaties, conventions and agreements, and Sec. 73.23 
for procedural provisions relating to compliance with them.
    (b) Engineering standards now in force domestically differ in some 
respects from those specified for international purposes. The 
engineering standards specified for international purposes (see 
Sec. 73.1650, International Agreements) will be used to determine:
    (1) The extent to which interference might be caused by a proposed 
station in the United States to a station in another country; and
    (2) whether the United States should register an objection to any 
new or changed assignment notified by another country. The domestic 
standards in effect in the United States will be used to determine the 
extent to which interference exists or would exist from a foreign 
station where the value of such interference enters into a calculation 
of:
    (i) The service to be rendered by a proposed operation in the United 
States; or
    (ii) the permissible interfering signal from one station in the 
United States to another United States station.

[28 FR 13574, Dec. 14, 1963, as amended at 29 FR 9499, July 11, 1964; 49 
FR 32358, Aug. 14, 1984; 50 FR 18821, May 2, 1985; 54 FR 39736, Sept. 
28, 1989; 56 FR 64857, Dec. 12, 1991]



Sec. 73.29  Class C stations on regional channels.

    No license will be granted for the operation of a Class C station on 
a regional channel.

[ 56 FR 64857, Dec. 12, 1991]

[[Page 15]]



Sec. 73.30  Petition for authorization of an allotment in the 1605-1705 kHz band.

    (a) Any party interested in operating an AM broadcast station on one 
of the ten channels in the 1605-1705 kHz band must file a petition for 
the establishment of an allotment to its community of license. Each 
petition must include the following information:
    (1) Name of community for which allotment is sought;
    (2) Frequency and call letters of the petitioner's existing AM 
operation; and
    (3) Statement as to whether or not AM stereo operation is proposed 
for the operation in the 1605-1705 kHz band.
    (b) Petitions are to be filed during a filing period to be 
determined by the Commission. For each filing period, eligible stations 
will be allotted channels based on the following steps:
    (1) Stations are ranked in descending order according to the 
calculated improvement factor.
    (2) The station with the highest improvement factor is initially 
allotted the lowest available channel.
    (3) Successively, each station with the next lowest improvement 
factor, is allotted an available channel taking into account the 
possible frequency and location combinations and relationship to 
previously selected allotments. If a channel is not available for the 
subject station, previous allotments are examined with respect to an 
alternate channel, the use of which would make a channel available for 
the subject station.
    (4) When it has been determined that, in accordance with the above 
steps, no channel is available for the subject station, that station is 
no longer considered and the process continues to the station with the 
next lowest improvement factor.
    (c) If awarded an allotment, a petitioner will have sixty (60) days 
from the date of public notice of selection to file an application for 
construction permit on FCC Form 301. (See Secs. 73.24 and 73.37(e) for 
filing requirements). Unless instructed by the Commission to do 
otherwise, the application shall specify Model I facilities. (See 
Sec. 73.14). Upon grant of the application and subsequent construction 
of the authorized facility, the applicant must file a license 
application on FCC Form 302.

    Note 1: Until further notice by the Commission, the filing of these 
petitions is limited to licensees of existing AM stations (excluding 
Class C stations) operating in the 535-1605 kHz band. First priority 
will be assigned to Class D stations located within the primary service 
contours of U.S. Class A stations that are licensed to serve communities 
of 100,000 or more for which there exists no local fulltime aural 
service.

    Note 2: Selection among competing petitions will be based on 
interference reduction. Notwithstanding the exception contained in Note 
5 of this section, within each operational category, the station 
demonstrating the highest value of improvement factor will be afforded 
the highest priority for an allotment, with the next priority assigned 
to the station with next lowest value, and so on, until available 
allotments are filled.

    Note 3: The Commission will periodically evaluate the progress of 
the movement of stations from the 535-1605 kHz band to the 1605-1705 kHz 
band to determine whether the 1605-1705 kHz band should continue to be 
administered on an allotment basis or modified to an assignment method. 
If appropriate, the Commission will later develop further procedures for 
use of the 1605-1705 kHz band by existing station licensees and others.

    Note 4: Other than the exception specified in note 1 of this 
section, existing fulltime stations are considered first for selection 
as described in note 2 of this section. In the event that an allotment 
availability exists for which no fulltime station has filed a relevant 
petition, such allotment may be awarded to a licensed Class D station. 
If more than one Class D station applies for this migration opportunity, 
the following priorities will be used in the selection process: First 
priority--a Class D station located within the 0.5 mV/m-50% contour of a 
U.S. Class A station and licensed to serve a community of 100,000 or 
more, for which there exists no local fulltime aural service; Second 
priority--Class D stations ranked in order of improvement factor, from 
highest to lowest, considering only those stations with improvement 
factors greater than zero.

    Note 5: The preference for AM stereo in the expanded band will be 
administered as follows: when an allotment under consideration 
(candidate allotment) conflicts with one or more previously selected 
allotments (established allotments) and cannot be accommodated in the 
expanded band, the candidate allotment will be substituted for the 
previously established allotment provided that: the petitioner for the 
candidate allotment has made a written commitment to the use of AM 
stereo and the petitioner for the established allotment has not; the 
difference

[[Page 16]]

between the ranking factors associated with the candidate and 
established allotments does not exceed 10% of the ranking factor of the 
candidate allotment; the substitution will not require the displacement 
of more than one established allotment; and both the candidate allotment 
and the established allotment are within the same priority group.


[58 FR 27949, May 12, 1993]



Sec. 73.31  Rounding of nominal power specified on applications.

    (a) An application filed with the FCC for a new station or for an 
increase in power of an existing station shall specify nominal power 
rounded to two significant figures as follows:

------------------------------------------------------------------------
                                                                Rounded
                                                                down to
                      Nominal power (kW)                        nearest
                                                                 figure
                                                                  (kW)
------------------------------------------------------------------------
Below 0.25...................................................      0.001
0.25 to 0.99.................................................       0.01
1 to 9.9.....................................................        0.1
10 to 50.....................................................          1
------------------------------------------------------------------------

    (b) In rounding the nominal power in accordance with paragraph (a) 
of this section the RMS shall be adjusted accordingly. If rounding 
upward to the nearest figure would result in objectionable interference, 
the nominal power specified on the application is to be rounded downward 
to the next nearest figure and the RMS adjusted accordingly.

[50 FR 18821, May 2, 1985, as amended at 53 FR 1031, Jan. 15, 1988]



 73.33  Antenna systems; showing required.

    (a) An application for authority to install a broadcast antenna 
shall specify a definite site and include full details of the antenna 
design and expected performance.
    (b) All data necessary to show compliance with the terms and 
conditions of the construction permit must be filed with the license 
application. If the station is using a directional antenna, a proof of 
performance must also be filed.

[28 FR 13574, Dec. 14, 1963, as amended at 37 FR 25840, Dec. 5, 1972]



Sec. 73.35  Calculation of improvement factors.

    A petition for an allotment (See Sec. 73.30) in the 1605-1705 kHz 
band filed by an existing fulltime AM station licensed in the 535-1605 
kHz band will be ranked according to the station's calculated 
improvement factor. (See Sec. 73.30). Improvement factors relate to both 
nighttime and daytime interference conditions and are based on two 
distinct considerations: (a) Service area lost by other stations due to 
interference caused by the subject station, and (b) service area of the 
subject station. These considerations are represented by a ratio. The 
ratio consists, where applicable, of two separate additive components, 
one for nighttime and one for daytime. For the nighttime component, to 
determine the numerator of the ratio (first consideration), calculate 
the RSS and associated service area of the stations (co- and adjacent 
channel) to which the subject station causes nighttime interference. 
Next, repeat the RSS and service area calculations excluding the subject 
station. The cumulative gain in the above service area is the numerator 
of the ratio. The denominator (second consideration) is the subject 
station's interference-free service area. For the daytime component, the 
composite amount of service lost by co-channel and adjacent channel 
stations, each taken individually, that are affected by the subject 
station, excluding the effects of other assignments during each study, 
will be used as the numerator of the daytime improvement factor. The 
denominator will consist of the actual daytime service area (0.5 mV/m 
contour) less any area lost tointerference from other assignments. The 
value of this combined ratio will constitute the petitioner's 
improvement factor. Notwithstanding the requirements of Sec. 73.153, for 
uniform comparisons and simplicity, measurement data will not be used 
for determining improvement factors and FCC figure M-3 ground 
conductivity values are to be used exclusively in accordance with the 
pertinent provisions of Sec. 73.183(c)(1).

[56 FR 64858, Dec. 12, 1991]

[[Page 17]]



Sec. 73.37  Applications for broadcast facilities, showing required.

    (a) No application will be accepted for a new station if the 
proposed operation would involve overlap of signal strength contours 
with any other station as set forth below in this paragraph; and no 
application will be accepted for a change of the facilities of an 
existing station if the proposed change would involve such overlap where 
there is not already such overlap between the stations involved:

------------------------------------------------------------------------
                                 Contour of
                                  proposed
                                   station       Contour of any other
   Frequency separation (kHz)     (classes          station (mV/m)
                                  B, C and
                                  D) (mV/m)
------------------------------------------------------------------------
0..............................       0.005  0.100 (Class A).
                                      0.025  0.500(Other classes).
                                      0.500  0.025 (All classes).
10.............................       0.250  0.500(All classes).
                                      0.500  0.250 (All classes).
20.............................           5  5 (All classes).
                                          5  5 (All classes).
30.............................          25  25 (All classes).
------------------------------------------------------------------------

    (b) In determining overlap received, an application for a new Class 
C station with daytime power of 250 watts, or greater, shall be 
considered on the assumption that both the proposed operation and all 
existing Class C stations operate with 250 watts and utilize non-
directional antennas.
    (c) If otherwise consistent with the public interest, an application 
requesting an increase in the daytime power of an existing Class C 
station on a local channel from 250 watts to a maximum of 1kW, or from 
100 watts to a maximum of 500 watts, may be granted notwithstanding 
overlap prohibited by paragraph (a) of this section. In the case of a 
100 watt Class C station increasing daytime power, the provisions of 
this paragraph shall not be construed to permit an increase in power to 
more than 500 watts, if prohibited overlap would be involved, even if 
successive applications should be tendered.
    (d) In addition to demonstrating compliance with paragraphs (a), 
and, as appropriate, (b), and (c) of this section, an application for a 
new AM broadcast station, or for a major change (see Sec. 73.3571(a)(1)) 
in an authorized AM broadcast station, as a condition for its 
acceptance, shall make a satisfactory showing, if new or modified 
nighttime operation by a Class B station is proposed, that objectionable 
interference will not result to an authorized station, as determined 
pursuant to Sec. 73.182(1).
    (e) An application for an authorization in the 1605-1705 kHz band 
which has been selected through the petition process (See Sec. 73.30) is 
not required to demonstrate compliance with paragraph (a), (b), (c), or 
(d) of this section. Instead, the applicant need only comply with the 
terms of the allotment authorization issued by the Commission in 
response to the earlier petition for establishment of a station in the 
1605-1705 kHz band. Within the allotment authorization, the Commission 
will specify the assigned frequency and the applicable technical 
requirements.
    (f) Stations on 1580, 1590 and 1600 kHz. In addition to the rules 
governing the authorization of facilities in the 535-1605 kHz band, 
stations on these frequencies seeking facilities modifications must 
protect assignments in the 1610-1700 kHz band. Such protection shall be 
afforded in a manner which considers the spacings that occur or exist 
between the subject station and a station within the range 1605-1700 
kHz. The spacings are the same as those specified for stations in the 
frequency band 1610-1700 kHz or the current separation distance, 
whichever is greater. Modifications that would result in a spacing or 
spacings that fails to meet any of the separations must include a 
showing that appropriate adjustment has been made to the radiated signal 
which effectively results in a site-to-site radiation that is equivalent 
to the radiation of a station with standard Model I facilities (10 kW-D, 
1 kW-N, non-DA, 90 degree antenna ht. & ground system) operating in 
compliance with all of the above separation distances. In those cases 
where that radiation equivalence value is already exceeded, a station 
may continue to maintain, but not increase beyond that level.

    Note  1: In the case of applications for changes in the facilities 
of AM broadcast stations covered by this section, an application will be 
accepted even though overlap of field strength contours as mentioned in 
this section would occur with another station in an

[[Page 18]]

area where such overlap does not already exist, if:
    (1) The total area of overlap with that station would not be 
increased;
    (2) There would be no net increase in the area of overlap with any 
other station; and
    (3) There would be created no area of overlap with any station with 
which overlap does not now exist.

    Note 2: The provisions of this section concerning prohibited overlap 
of field strength contours will not apply where:
    (1) The area of overlap lies entirely over sea water: or
    (2) The only overlap involved would be that caused to a foreign 
station, in which case the provisions of the applicable international 
agreement, as identified in Sec. 73.1650, will apply. When overlap would 
be received from a foreign station, the provisions of this section will 
apply, except where there would be overlap with a foreign station with a 
frequency separation of 20 kHz, in which case the provisions of the 
international agreement will apply in lieu of this section.

    Note 3: In determining the number of ``authorized'' aural 
transmission facilities in a given community, applications for that 
community in hearing or otherwise having protected status under 
specified ``cut-off'' procedures shall be considered as existing 
stations. In the event that there are two or more mutually exclusive 
protected applications seeking authorization for the proposed community 
it will be assumed that only one is ``authorized.''

    Note 4: A ``transmission facility'' for a community is a station 
licensed to the community. Such a station provides a ``transmission 
service'' for that community.


[56 FR 64858, Dec. 12, 1991; 57 FR 43290, Sept. 18, 1992]



Sec. 73.44  AM transmission system emission limitations.

    (a) The emissions of stations in the AM service shall be attenuated 
in accordance with the requirements specified in paragraph (b) of this 
section. Emissions shall be measured using a properly operated and 
suitable swept-frequency RF spectrum analyzer using a peak hold duration 
of 10 minutes, no video filtering, and a 300 Hz resolution bandwidth, 
except that a wider resolution bandwidth may be employed above 11.5 kHz 
to detect transient emissions. Alternatively, other specialized 
receivers or monitors with appropriate characteristics may be used to 
determine compliance with the provisions of this section, provided that 
any disputes over measurement accuracy are resolved in favor of 
measurements obtained by using a calibrated spectrum analyzer adjusted 
as set forth above.
    (b) Emissions 10.2 kHz to 20 kHz removed from the carrier must be 
attenuated at least 25 dB below the unmodulated carrier level, emissions 
20 kHz to 30 kHz removed from the carrier must be attenuated at least 35 
dB below the unmodulated carrier level, emissions 30 kHz to 60 kHz 
removed from the carrier must be attenuated at least [5 + 1 dB/kHz] 
below the unmodulated carrier level, and emissions between 60 kHz and 75 
kHz of the carrier frequency must be attenuated at least 65 dB below the 
unmodulated carrier level. Emissions removed by more than 75 kHz must be 
attenuated at least 43 + 10 Log (Power in watts) or 80 dB below the 
unmodulated carrier level, whichever is the lesser attenuation, except 
for transmitters having power less than 158 watts, where the attenuation 
must be at least 65 dB below carrier level.
    (c) Should harmful interference be caused to the reception of other 
broadcast or non-broadcast stations by out of band emissions, the 
licensee may be directed to achieve a greater degree of attentuation 
than specified in paragraphs (a) and (b) of this section.
    (d) Measurements to determine compliance with this section for 
transmitter type acceptance are to be made using signals sampled at the 
output terminals of the transmitter when operating into an artificial 
antenna of substantially zero reactance. Measurements made of the 
emissions of an operating station are to be made at ground level 
approximately 1 kilometer from the center of the antenna system. When a 
directional antenna is used, the carrier frequency reference field 
strength to be used in order of preference shall be:
    (1) The measure non-directional field strength.
    (2) The RMS field strength determined from the measured directional 
radiation pattern.
    (3) The calculated expected field strength that would be radiated by 
a non-directional antenna at the station authorized power.

[[Page 19]]

    (e) Licensees of stations complying with the ANSI/EIA-549-1988, 
NRSC-1 AM Preemphasis/Deemphasis and Broadcast Transmission Bandwidth 
Specifications (NRSC-1), prior to June 30, 1990 or from the original 
commencement of operation will, until June 30, 1994, be considered to 
comply with paragraphs (a) and (b) of this section, absent any reason 
for the Commission to believe otherwise. Such stations are waived from 
having to make the periodic measurements required in Sec. 73.1590(a)(6) 
until June 30, 1994. However, licensees must make measurements to 
determine compliance with paragraphs (a) and (b) of this section upon 
receipt of an Official Notice of Violation or a Notice of Apparent 
Liability alleging noncompliance with those provisions, or upon specific 
request by the Commission.

[47 FR 8588, Mar. 1, 1982, as amended at 49 FR 3999, Feb. 1, 1984]



Sec. 73.45  AM antenna systems.

    (a) All applicants for new, additional, or different AM station 
facilities and all licensees requesting authority to change the 
transmitting system site of an existing station must specify an antenna 
system, the efficiency of which complies with the requirements for the 
class and power of station. (See Secs. 73.186 and 73.189.)
    (1) An application for authority to install an AM broadcast antenna 
must specify a definite site and include full details of the antenna 
system design and expected performance.
    (2) All data necessary to show compliance with the terms and 
conditions of the construction permit must be filed with the application 
for the station license to cover the construction. If the station has 
constructed a directional antenna, a directional proof of performance 
must be filed. See Secs. 73.150 through 73.157.
    (b) The simultaneous use of a common antenna or antenna structure by 
more than one AM station or by a station of any other type or service 
may be authorized provided:
    (1) Engineering data are submitted showing that satisfactory 
operation of each station will be obtained without adversely affecting 
the operation of the other station(s).
    (2) The minimum field strength for each AM station complies with 
Sec. 73.189(b).
    (c) Should any changes be made or otherwise occur which would 
possibly alter the resistance of the antenna system, the licensee must 
commence the determination of the operating power by a method described 
in Sec. 73.51(a)(1) or (d). (If the changes are due to the construction 
of FM or TV transmitting facilities, see Secs. 73.316, 73.685, and 
73.1692.) Upon completion of any necessary repairs or adjustments, or 
upon completion of authorized construction or modifications, the 
licensee must make a new determination of the antenna resistance using 
the procedures described in Sec. 73.54. Operating power should then be 
determined by a direct method as described in Sec. 73.51. Notification 
of the value of resistance of the antenna system must be filed with the 
FCC in Washington, DC as follows:
    (1) Whenever the measurements show that the antenna or common point 
resistance differs from that shown on the station authorization by more 
than 2%, FCC Form 302 must be filed with the information and measurement 
data specified in Sec. 73.54(d).
    (2) Whenever AM stations use direct reading power meters pursuant to 
Sec. 73.51, a letter notification to the FCC in Washington, DC, 
Attention: Audio Services Division, Mass Media Bureau, must be filed in 
accordance with Sec. 73.54(e).

[43 FR 53735, Nov. 17, 1978, as amended at 45 FR 28141, Apr. 28, 1980; 
47 FR 8589, Mar. 1, 1982; 50 FR 32416, Aug. 12, 1985; 51 FR 2707; Jan. 
21, 1986; 51 FR 26250, July 22, 1986; 63 FR 33875, June 22, 1998]



Sec. 73.49  AM transmission system fencing requirements.

    Antenna towers having radio frequency potential at the base (series 
fed, folded unipole, and insulated base antennas) must be enclosed 
within effective locked fences or other enclosures. Ready access must be 
provided to each antenna tower base for meter reading and maintenance 
purposes at all times. However, individual tower fences need not be 
installed if the towers are contained within a protective property 
fence.

[51 FR 2707, Jan. 21, 1986]

[[Page 20]]



Sec. 73.51  Determining operating power.

    (a) Except in those circumstances described in paragraph (d) of this 
section, the operating power shall be determined by the direct method. 
The direct method consists of either:
    (1) using a suitable instrument for determining the antenna's input 
power directly from the RF voltage, RF current, and phase angle; or
    (2) calculating the product of the licensed antenna or common point 
resistance at the operating frequency (see Sec. 73.54), and the square 
of the indicated unmodulated antenna current at that frequency, measured 
at the point where the resistance has been determined.
    (b) The authorized antenna input power for each station shall be 
equal to the nominal power for such station, with the following 
exceptions:
    (1) For stations with nominal powers of 5 kW, or less, the 
authorized antenna input power to directional antennas shall exceed the 
nominal power by 8 percent.
    (2) For stations with nominal powers in excess of 5 kW, the 
authorized antenna input power to directional antennas shall exceed the 
nominal power by 5.3 percent.
    (3) In specific cases, it may be necessary to limit the radiated 
field to a level below that which would result if normal power were 
delivered to the antenna. In such cases, excess power may be dissipated 
in the antenna feed circuit, the transmitter may be operated with power 
output at a level which is less than the rated carrier power, or a 
combination of the two methods may be used, subject to the conditions 
given in paragraph (c) of this section.
    (i) Where a dissipative network is employed, the authorized antenna 
current and resistance, and the authorized antenna input power shall be 
determined at the input terminals of the dissipative network.
    (ii) Where the authorized antenna input power is less than the 
nominal power, subject to the conditions set forth in paragraph (c) of 
this section, the transmitter may be operated at the reduced power level 
necessary to supply the authorized antenna input power.
    (c) Applications for authority to operate with antenna input power 
which is less than nominal power and/or to employ a dissipative network 
in the antenna system shall be made on FCC Form 302. The technical 
information supplied on section II-A of this form shall be that applying 
to the proposed conditions of operation. In addition, the following 
information shall be furnished, as pertinent:
    (1) Full details of any network employed for the purpose of 
dissipating radio frequency energy otherwise delivered to the antenna 
(see Sec. 73.54).
    (2) A showing that the transmitter has been type accepted or 
notified for operation at the proposed power output level, or, in lieu 
thereof:
    (i) A full description of the means by which transmitter output 
power will be reduced.
    (ii) Where the proposed transmitter power output level(s) is less 
than 90% of the rated power of the transmitter, equipment performance 
measurements must be made to confirm that the station transmissions 
conform to the emission limitation specified in Sec. 73.44, under all 
conditions of program operation.
    (iii) A showing that, at the proposed power output level, means are 
provided for varying the transmitter output within a tolerance of 
plus-minus10 percent, to compensate for variations in line 
voltage or other factors which may affect the power output level.
    (d) When it is not possible or appropriate to use the direct method 
of power determination due to technical reasons, the indirect method of 
determining operating power (see paragraphs (e) and (f) of this section) 
may be used on a temporary basis. A notation must be made in the station 
log indicating the dates of commencement and termination of measurement 
using the indirect method of power determination.
    (e) The antenna input power is determined indirectly by applying an 
appropriate factor to the input power to the last radio-frequency power 
amplifier stage of the transmitter, using the following formula:
Where:

Antenna input power=Ep x Ip x F

Ep=DC input voltage of final radio stage.

[[Page 21]]

Ip=Total DC input current of final radio stage.
F= Efficiency factor.

    (1) If the above formula is not appropriate for the design of the 
transmitter final amplifier, use a formula specified by the transmitter 
manufacturer with other appropriate operating parameters.
    (2) The value of F applicable to each mode of operation must be 
determined and a record kept thereof with a notation as to its 
derivation. This factor is to be established by one of the methods 
described in paragraph (f) of this section and retained in the station 
records.
    (f) The value of F is to be determined by one of the following 
procedures listed in order of preference:
    (1) If the station had previously been authorized and operating by 
determining the antenna input power by the direct method, the factor F 
is the ratio of the antenna input power (determined by the direct 
method) to the corresponding final radio frequency power amplifier input 
power.
    (2) If a station has not been previously in regular operation with 
the power authorized for the period of indirect power determination, if 
a new transmitter has been installed, or if, for any other reason, the 
determination of the factor F by the method described in paragraph 
(f)(1) of this section is impracticable:
    (i) The factor F as shown in the transmitter manufacturer's test 
report, if such a test report specifies a unique value of F for the 
power level and frequently used; or
    (ii) The value determined by reference to the following table:

------------------------------------------------------------------------
                Method of        Maximum rated carrier      Class of
Factor(F)       modulation               power              amplifier
------------------------------------------------------------------------
   0.70    Plate..............  1 kW or less..........  ................
    .80    Plate..............  2.5 kW and over.......  ................
    .35    Low level..........  0.25 kW and over......  B
    .65    Low level..........  0.25 kW and over......  BC\1\
    .35    Grid...............  0.25 kW and over......  ................
------------------------------------------------------------------------
\1\ All linear amplifier operation where efficiency approaches that of
  class C operation.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, as amended, 1068, 1082, as 
amended; 47 U.S.C. 154, 155, 303. Interpret or apply secs. 301, 303, 
307, 48 Stat. 1081, 1082, as amended, 47 U.S.C. 301, 303, 307)

[37 FR 7516, Apr. 15, 1972, as amended at 42 FR 36827, July 18, 1977; 42 
FR 61863, Dec. 7, 1977; 44 FR 36036, June 20, 1979; 47 FR 28387, June 
30, 1982; 48 FR 38477, Aug. 24, 1983; 48 FR 44805, Sept. 30, 1983; 49 FR 
3999, Feb. 1, 1984; 49 FR 4210, Feb. 3, 1984; 49 FR 49850, Dec. 24, 
1984; 50 FR 24521, June 11, 1985; 52 FR 10570, Apr. 2, 1987]



Sec. 73.53  Requirements for authorization of antenna monitors.

    (a) Antenna monitors shall be verified for compliance with the 
technical requirements in this section. The procedure for verification 
is specified in subpart J of part 2 of the FCC's rules.
    (b) An antenna monitor shall meet the following specifications:
    (1) The monitor shall be designed to operate in the 535-1705 kHz 
band.
    (2) The monitor shall be capable of indicating any phase difference 
between two RF voltages of the same frequency over a range of from 0 to 
360 deg..
    (3) The monitor shall be capable of indicating the relative 
amplitude of two RF voltages.
    (4) The device used to indicate phase differences shall indicate in 
degrees, and shall be graduated in increments of 2 deg., or less. If a 
digital indicator is provided, the smallest increment shall be 0.5 deg., 
or less.
    (5) The device used to indicate relative amplitudes shall be 
graudated in increments which are 1 percent, or less, of the full scale 
value. If a digital indicator is provided, the smallest increment shall 
be 0.1 percent, or less, of the full scale value.
    (6) The monitor shall be equipped with means, if necessary, to 
resolve ambiguities in indication.
    (7) If the monitor is provided with more than one RF input terminal 
in addition to a reference input terminal, appropriate switching shall 
be provided in the monitor so that the signal at each of these RF inputs 
may be selected separately for comparison with the reference input 
signal.
    (8) Each RF input of the monitor shall provide a termination of such 
characteristics that, when connected

[[Page 22]]

to a sampling line of an impedance specified by the manufacturer the 
voltage reflection coefficient shall be 3 percent or less.
    (9) The monitor, if intended for use by stations operating 
directional antenna systems by remote control, shall be designed so that 
the switching functions required by paragraph (b)(7) of this section may 
be performed from a point external to the monitor, and phase and 
amplitude indications be provided by external meters. The indications of 
external meters furnished by the manufacturer shall meet the 
specifications for accuracy and repeatability of the monitor itself, and 
the connection of these meters to the monitor, or of other indicating 
instruments with electrical characteristics meeting the specifications 
of the monitor manufacturer shall not affect adversely the performance 
of the monitor in any respect.
    (10) Complete and correct schematic diagrams and operating 
instructions shall be retained by the party responsible for verification 
of the equipment and submitted to the FCC upon request. For the purpose 
of equipment authorization, these diagrams and instructions shall be 
considered as part of the monitor.
    (11) When an RF signal of an amplitude within a range specified by 
the manufacturer is applied to the reference RF input terminal of the 
monitor, and another RF signal of the same frequency and of equal or 
lower amplitude is applied to any other selected RF input terminal, 
indications shall be provided meeting the following specifications.
    (i) The accuracy with which any difference in the phases of the 
applied signals is indicated shall be plus-minus1 deg., or 
better, for signal amplitude ratios of from 2:1 to 1:1, and 
plus-minus2 deg., or better, for signal amplitude ratios in 
excess of 2:1 and up to 5:1.
    (ii) The repeatability of indication of any difference in the phases 
of the applied signals shall be plus-minus1 deg., or better.
    (iii) The accuracy with which the relative amplitudes of the applied 
signals is indicated, over a range in which the ratio of these 
amplitudes is between 2:1 and 1:1, shall be plus-minus2 
percent of the amplitude ratio, or better, and for amplitude ratios in 
excess of 2:1 and up to 5:1, plus-minus5 percent of the 
ratio, or better.
    (iv) The repeatability of indication of the relative amplitudes of 
the applied signals, over a range where the ratio of these amplitudes is 
between 5:1 and 1:1, shall be plus-minus2 percent of the 
amplitude ratio, or better.
    (v) The modulation of the RF signals by a sinusoidal wave of any 
frequency between 100 and 10,000 Hz, at any amplitude up to 90 percent 
shall cause no deviation in an indicated phase difference from its 
value, as determined without modulation, greater than 
plus-minus0.5 deg..
    (12) The performance specifications set forth in paragraph (c)(13) 
of this section, shall be met when the monitor is operated and tested 
under the following conditions.
    (i) After continuous operation for 1 hour, the monitor shall be 
calibrated and adjusted in accordance with the manufacturer's 
instructions.
    (ii) The monitor shall be subjected to variations in ambient 
temperature between the limits of 10 and 40 deg.C; external meters 
furnished by the manufacturer will be subjected to variations between 15 
and 30 deg.C.
    (iii) Powerline supply voltage shall be varied over a range of from 
10 percent below to 10 percent above the rated supply voltage.
    (iv) The amplitude of the reference signal shall be varied over the 
operating range specified by the manufacturer, and in any case over a 
range of maximum to minimum values of 3 to 1.
    (v) The amplitude of the comparison signal shall be varied from a 
value which is 0.2 of the amplitude of the reference signal to a value 
which is equal in amplitude to the reference signal.
    (vi) Accuracy shall be determined for the most adverse combination 
of conditions set forth above.
    (vii) Repeatability shall be determined as that which may be 
achieved under the specified test conditions over a period of 7 days, 
during which no calibration or adjustment of the instrument, subsequent 
to the initial calibration, shall be made.
    (viii) The effects of modulation of the RF signal shall be 
separately determined, and shall not be included in establishing values 
for accuracy and repeatability.

[[Page 23]]

    (c) A station determined to have a critical directional antenna must 
use an antenna monitor having high tolerance characteristics determined 
on an individual basis, and specified on the station authorization. Such 
monitors are not subject to the authorization of paragraph (a), however 
they may be used only at the station for which they were specified.

    Note: In paragraph (b)(1) of this section, the requirement that 
monitors be capable of operation in the 535-1705 kHz band shall apply 
only to equipment manufactured after July 1, 1992. Use of a monitor in 
the 1605-1705 kHz band which is not approved for such operation will be 
permitted pending the general availability of 535-1705 kHz band monitors 
if a manufacturer can demonstrate, in the interim, that its monitor 
performs in accordance with the standards in this section on these 10 
channels.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[38 FR 1917, Jan. 19, 1973, as amended at 49 FR 3999, Feb. 1, 1984; 49 
FR 29069, July 18, 1984; 50 FR 32416, Aug. 12, 1985; 50 FR 47054, Nov. 
14, 1985; 51 FR 2707, Jan. 21, 1986; 56 FR 64859, Dec. 12, 1991; 57 FR 
43290, Sept. 18, 1992; 60 FR 55480, Nov. 1, 1995; 63 FR 36604, July 7, 
1998]



Sec. 73.54  Antenna resistance and reactance measurements.

    (a) The resistance of an omnidirectional series fed antenna is 
measured at either the base of the antenna without intervening coupling 
or tuning networks, or at the point the transmission line connects to 
the output terminals of the transmitter. The resistance of a shunt 
excited antenna may be measured at the point the radio frequency energy 
is transferred to the feed wire circuit or at the output terminals of 
the transmitter.
    (b) The resistance and reactance of a directional antenna shall be 
measured at the point of common radiofrequency input to the directional 
antenna system. The following conditions shall obtain:
    (1) The antenna shall be finally adjusted for the required radiation 
pattern.
    (2) The reactance at the operating frequency and at the point of 
measurement shall be adjusted to zero, or as near thereto as 
practicable.
    (c)(1) The resistance of an antenna shall be determined by the 
following procedure: A series of discrete measurements shall be made 
over a band of frequencies extending from approximately 25 kHz below the 
operating frequency to approximately 25 kHz above that frequency, at 
intervals of approximately 5 kHz. The measured values shall be plotted 
on a linear graph, with frequency as the abscissa and resistance as the 
ordinate. A smooth curve shall be drawn through the plotted values. The 
resistance value corresponding to the point of intersection of the curve 
and the ordinate representing the operating frequency of the station 
shall be the resistance of the antenna.
    (2) For a directional antenna, the reactance of the antenna shall be 
determined by a procedure similar to that described in paragraph (c)(1) 
of this section.
    (d) A letter of notification must be filed with the FCC in 
Washington, DC, Attention: Audio Services Division, Mass Media Bureau, 
when determining power by the direct method pursuant to Sec. 73.51 and 
must specify the antenna or common point resistance at the operating 
frequency. The following information must also be kept on file at the 
station:
    (1) A full description of the method used to make measurements.
    (2) A schematic diagram showing clearly all components of coupling 
circuits, the point of resistance measurement, the location of the 
antenna ammeter, connections to and characteristics of all tower 
lighting isolation circuits, static drains, and any other fixtures 
connected to and supported by the antenna, including other antennas and 
associated networks. Any network or circuit component used to dissipate 
radio frequency power shall be specifically identified, and the 
impedances of all components which control the level of power 
dissipation, and the effective input resistance of the network must be 
indicated.
    (e) AM stations using direct reading power meters in accordance with 
Sec. 73.51, can either submit the information required by paragraph (d) 
of this section or submit a statement indicating that such a meter is 
being used.

[[Page 24]]

Subsequent station licenses will indicate the use of a direct reading 
power meter in lieu of the antenna resistance value in such a situation.

[34 FR 18305, Nov. 15, 1969, as amended at 37 FR 7517, Apr. 15, 1972; 45 
FR 26062, Apr. 17, 1980; 49 FR 49850, Dec. 24, 1984; 50 FR 32416, Aug. 
12, 1985; 51 FR 2707, Jan. 21, 1986; 51 FR 26250, July 22, 1986; 63 FR 
33876, June 22, 1998]



Sec. 73.57  Remote reading antenna and common point ammeters.

    Remote reading antenna and common point ammeters may be used without 
further authority according to the following conditions:
    (a) Remote reading antenna or common point ammeters may be provided 
by:
    (1) Inserting second radio frequency current sensing device directly 
in the antenna circuit with remote leads to the indicating instruments.
    (2) Inductive coupling to radio frequency current sensing device for 
providing direct current to indicating instrument.
    (3) Capacity coupling to radio frequency current sensing device for 
providing direct current to indicating instrument.
    (4) Current transformer connected to radio frequency current sensing 
device for providing direct current to indicating instrument.
    (5) Using transmission line current meter at transmitter as remote 
reading ammeter. See paragraph (c) of this section.
    (6) Using the indications of the antenna (phase) monitor, provided 
that when the monitor is used to obtain remote reading indication of 
non-directional antenna base current, the monitor calibration can be 
independently made and maintained for each mode of operation.
    (b) Devices used for obtaining remote reading antenna or common 
point current indications, except antenna monitor coupling elements, 
shall be located at the same point as, but below (transmitter side) the 
associated main ammeter.
    (c) In the case of shunt-excited antennas, the transmission line 
current meter at the transmitter may be considered as the remote antenna 
ammeter provided the transmission line is terminated directly into the 
excitation circuit feed line, which shall employ series tuning only (no 
shunt circuits of any type shall be employed) and insofar as 
practicable, the type and scale of the transmission line meter should be 
the same as those of the excitation circuit feed line meter (meter in 
slant wire feed line or equivalent).
    (d) Each remote reading ammeter shall be accurate to within 2 
percent of the value read on its corresponding regular ammeter.
    (e) All remote reading ammeters shall conform with the 
specifications for regular antenna ammeters.
    (f) Meters with arbitrary scale divisions may be used provided that 
calibration charts or curves are provided at the transmitter control 
point showing the relationship between the arbitrary scales and the 
reading of the main meters.
    (g) If a malfunction affects the remote reading indicators of the 
antenna or common point ammeter, the operating power may be determined 
by a method using alternative procedures as described in Sec. 73.51.

[41 FR 36817, Sept. 1, 1976, as amended at 48 FR 38477, Aug. 24, 1983; 
49 FR 49850, Dec. 24, 1984; 50 FR 32416, Aug. 12, 1985; 60 FR 55480, 
Nov. 1, 1995]



Sec. 73.58  Indicating instruments.

    (a) Each AM broadcast station must be equipped with indicating 
instruments which conform with the specifications described in 
Sec. 73.1215 for determining power by the direct and indirect methods, 
and with such other instruments as are necessary for the proper 
adjustment, operation, and maintenance of the transmitting system. 
However, auxiliary transmitters with a nominal power rating of 100 watts 
or less are not required to be equipped with instruments to determine 
power by the indirect method provided that the licensee can determine 
the antenna input power at all times.
    (b) A thermocouple type ammeter or other device capable of providing 
an indication of radio frequency current, meeting the requirements of 
Sec. 73.1215, shall be installed at the base of each antenna element. A 
suitable jack and

[[Page 25]]

plug arrangement may be used to permit removal of the meter from the 
antenna circuit thereby protecting it from damage by lighting.
    (c) Since it is usually impractical to measure the actual antenna 
current of a shunt excited antenna system, the current measured at the 
input of the excitation circuit feed line is accepted as the antenna 
current.
    (d) The function of each instrument shall be clearly and permanently 
shown on the instrument itself or on the panel immediately adjacent 
thereto.
    (e) In the event that any one of these indicating instruments 
becomes defective when no substitute which conforms with the required 
specifications is available, the station may be operated without the 
defective instrument pending its repair or replacement for a period not 
in excess of 60 days without further authority of the Commission: 
Provided, That:
    (1) If the defective instrument is an antenna base current ammeter 
of a directional antenna system, the indications may be obtained from 
the antenna monitor pending the return to service of the regular meter, 
provided other parameters are maintained at their normal values.
    (2) If the defective instrument is the antenna current meter of a 
non-directional station which does not employ a remote antenna ammeter, 
or if the defective instrument is the common point meter of a station 
which employs a directional antenna and does not employ a remote common 
point meter, the operating power shall be determined by a method 
described in Sec. 73.51(a)(1) or (d) during the entire time the station 
is operated without the antenna current meter or common point meter. 
However, if a remote meter is employed and the antenna current ammeter 
or common point meter becomes defective, the remote meter can be used to 
determine operating power pending the return to service of the regular 
meter.
    (f) If conditions beyond the control of the licensee prevent the 
restoration of the meter to service within the above allowed period, 
information requested in accordance with Sec. 73.3549 may be filed by 
letter with the FCC in Washington, DC, Attention: Audio Services 
Division, Mass Media Bureau, to request additional time as may be 
required to complete repairs of the defective instrument.

[41 FR 36817, Sept. 1, 1976, as amended at 48 FR 38477, Aug. 24, 1983; 
49 FR 49850, Dec. 24, 1984; 50 FR 32416, Aug. 12, 1985; 51 FR 2707, Jan. 
21, 1986; 53 FR 2498, Jan. 28, 1988; 63 FR 33876, June 22, 1998]



Sec. 73.61  AM directional antenna field strength measurements.

    (a) Each AM station using a directional antenna must make field 
strength measurements at the monitoring point locations specified in the 
instrument of authorization, as often as necessary to ensure that the 
field at those points does not exceed the values specified in the 
station authorization. Additionally, stations not having an approved 
sampling system must make the measurements once each calendar quarter at 
intervals not exceeding 120 days. The provision of this paragraph 
supersedes any schedule specified on a station license issued prior to 
January 1, 1986. The results of the measurements are to be entered into 
the station log pursuant to the provisions of Sec. 73.1820.
    (b) Partial proof of performance measurements using the procedures 
described in Sec. 73.154 must be made whenever the licensee has reason 
to believe that the radiated field may be exceeding the limits for which 
the station was most recently authorized to operate.
    (c) A station may be directed to make a partial proof of performance 
by the FCC whenever there is an indication that the antenna is not 
operating as authorized.

[50 FR 47054, Nov. 14, 1985]



Sec. 73.62  Directional antenna system tolerances.

    (a) Each AM station operating a directional antenna must maintain 
the indicated relative amplitudes of the antenna base currents and 
antenna monitor currents within 5% of the values specified therein. 
Directional antenna relativephase currents must be maintained to within 
3 deg. of the values

[[Page 26]]

specified on the instrument of authorization, unless other tolerances 
are specified therein.
    (b) Whenever the operating parameters of a directional antenna 
cannot be maintained within the tolerances specified in paragraph (a) of 
this section, the following procedures will apply:
    (1) The licensee shall measure and log every monitoring point at 
least once for each mode of directional operation. Subsequent variations 
in operating parameters will require the remeasuring and logging of 
every monitoring point to assure that the authorized monitoring point 
limits are not being exceeded.
    (2) Provided each monitoring point is within its specified limit, 
operation may continue for a period up to 30 days before a request for 
Special Temporary Authority (STA) must be filed, pursuant to paragraph 
(b)(4) of this section, to operate with parameters at variance from the 
provisions of paragraph (a) of this section.
    (3) If any monitoring point exceeds its specified limit, the 
licensee must either terminate operation within 3 hours or reduce power 
in accordance with the applicable provisions of Sec. 73.1350(d), in 
order to eliminate any possibility of interference or excessive 
radiation in any direction.
    (4) If operation pursuant to paragraph (b)(3) of this section is 
necessary, or before the 30 day period specified in paragraph (b)(2) of 
this section expires, the licensee must request a Special Temporary 
Authority (STA) in accordance with Sec. 73.1635 to continue operation 
with parameters at variance and/or with reduced power along with a 
statement certifying that all monitoring points will be continuously 
maintained within their specified limits.
    (5) The licensee will be permitted 24 hours to accomplish the 
actions specified in paragraph (b)(1) of this section; provided that, 
the date and time of the failure to maintain proper operating parameters 
has been recorded in the station log.
    (c) In any other situation in which it might reasonably be 
anticipated that the operating parameters might vary out of tolerance 
(such as planned array repairs or adjustment and proofing procedures), 
the licensee shall, before such activity is undertaken, obtain an STA in 
accordance with Sec. 73.1635 in order to operate with parameters at 
variance and/or with reduced power as required to maintain all 
monitoring points within their specified limits.

[50 FR 30946, July 31, 1985, as amended at 60 FR 55480, Nov. 1, 1995]



Sec. 73.68  Sampling systems for antenna monitors.

    (a) Each AM station permittee authorized to construct a new 
directional antenna system, must install the sampling system in 
accordance with the following specifications:
    (1) Devices used to extract or sample the current and the 
transmission line connecting the sampling elements to the antenna 
monitor must provide accurate and stable signals to the monitor (e.g., 
rigidly mounted and non-rotatable loops and all system components 
protected from physical and environmental disturbances).
    (2) Sampling lines for critical directional antennas (see 
Sec. 73.14) must be of uniform length. Sampling lines for non-critical 
directional antennas may be of different lengths provided the phase 
difference of signals at the monitor are less than 0.5 deg. between the 
shortest and longest cable lengths due to temperature variations to 
which the system is exposed.
    (3) Other configurations of sampling systems may be used upon 
demonstration of stable operation to the FCC.
    (b) A station having an antenna sampling system constructed 
according to the specifications given in paragraph (a) of this section 
may obtain approval of that system by submitting an informal letter 
request to the FCC in Washington, DC, Attention: Audio Services 
Division, Mass Media Bureau. The request for approval, signed by the 
licensee or authorized representative, must contain sufficient 
information to show that the sampling system is in compliance with all 
requirements of paragraph (a) of this section.

    Note to paragraph (b): A public notice dated December 9, 1985 giving 
additional information on approval of antenna sampling systems is 
available through the Internet at

[[Page 27]]

http://www.fcc.gov/mmb/asd/decdoc/letter/1985-12-09--sample.html.

    (c) In the event that the antenna monitor sampling system is 
temporarily out of service for repair or replacement, the station may be 
operated, pending completion of repairs or replacement, for a period not 
exceeding 120 days without further authority from the FCC if all other 
operating parameters and the field monitoring point values are within 
the limits specified on the station authorization.
    (d) If the antenna sampling system is modified or components of the 
sampling system are replaced, the following procedure shall be followed:
    (1) Special Temporary Authority (see Sec. 73.1635) shall be 
requested and obtained from the Commission's Audio Services Division, 
Mass Media Bureau in Washington to operate with parameters at variance 
with licensed values pending issuance of a modified license specifying 
parameters subsequent to modification or replacement of components.
    (2) Immediately prior to modification or replacement of components 
of the sampling system not on the towers, and after a verification that 
all monitoring point values, base current ratios and operating 
parameters are within the limits or tolerances specified in the 
instrument of authorization or the pertinent rules, the following 
indications must be read for each radiation pattern: Final plate current 
and plate voltage, common point current, base currents and their ratios, 
antenna monitor phase and current indications, and the field strength at 
each monitoring point. Subsequent to these modifications or changes the 
above procedure must be repeated.
    (3) If that portion of the sampling system above the base of the 
towers is modified or components replaced, a partial proof of 
performance shall be executed in accordance with Sec. 73.154 subsequent 
to these changes. The partial proof of performance shall be accompanied 
by common point impedance measurements made in accordance with 
Sec. 73.54.
    (4) Request for modification of license shall be submitted to the 
FCC in Washington, DC, within 30 days of the date of sampling system 
modification or replacement. Such request shall specify the transmitter 
plate voltage and plate current, common point current, base currents and 
their ratios, antenna monitor phase and current indications, and all 
other data obtained pursuant to this paragraph.
    (e) If an existing sampling system is found to be patently of 
marginal construction, or where the performance of a directional antenna 
is found to be unsatisfactory, and this deficiency reasonably may be 
attributed, in whole or in part, to inadequacies in the antenna 
monitoring system, the FCC may require the reconstruction of the 
sampling system in accordance with requirements specified above.

[41 FR 7405, Feb. 18, 1976, as amended at 42 FR 24056, May 12, 1977; 44 
FR 58731, Oct. 11, 1979; 46 FR 35462, July 8, 1981; 48 FR 38478, Aug. 
24, 1983; 48 FR 44805, Sept. 30, 1983; 49 FR 32358, Aug. 14, 1984; 50 FR 
47054, Nov. 14, 1985; 51 FR 9965, Mar. 24, 1986; 51 FR 40435, Nov. 7, 
1986; 56 FR 64859, Dec. 12, 1991; 63 FR 33876, June 22, 1998]



Sec. 73.69  Antenna monitors.

    (a) Each station using a directional antenna must have in operation 
at the transmitter site an FCC authorized antenna monitor. However, if 
the station authorization sets specific tolerances within which the 
phase and amplitude relationships must be maintained, or requires the 
use of a monitor of specified repeatability, resolution or accuracy, the 
antenna monitor used will be authorized on an individual basis.
    (1) Normally, the antenna monitor is to be installed immediately 
adjacent to the transmitter and antenna phasing equipment. However, the 
monitor may be located elsewhere provided that its environment is 
maintained at all times within those limits under which the monitor was 
type-approved.
    (2) The antenna monitor installed at a station operating a 
directional antenna by remote control or when the monitor is installed 
in the antenna field at a distance from the transmitter, must be 
designed and authorized for such use in accordance with the provisions 
of Sec. 73.53(b)(9).

[[Page 28]]

    (b) In the event that the antenna monitor sampling system is 
temporarily out of service for repair or replacement, the station may be 
operated, pending completion of repairs or replacement, for a period not 
exceeding 120 days without further authority from the FCC if all other 
operating parameters, and the field monitoring point values are within 
the limits specified on the station authorization.
    (c) If conditions beyond the control of the licensee prevent the 
restoration of the monitor to service within the allowed period, an 
informal letter request in accordance with Sec. 73.3549 of the 
Commission's rules must be filed with the FCC, Attention: Audio Services 
Division, Mass Media Bureau in Washington, DC for such additional time 
as may be required to complete repairs of the defective instrument.
    (d) If an authorized antenna monitor is replaced by another antenna 
monitor, the following procedure shall be followed:
    (1) Temporary authority shall be requested and obtained from the 
Commission in Washington to operate with parameters at variance with 
licensed values, pending issuance of a modified license specifying new 
parameters.
    (2) Immediately prior to the replacement of the antenna monitor, 
after a verification that all monitoring point values and base current 
ratios are within the limits or tolerances specified in the instrument 
of authorization or the pertinent rules, the following indications must 
be read for each radiation pattern: Final plate current and plate 
voltage, common point current, base currents, antenna monitor phase and 
current indications, and the field strength at each monitoring point.
    (3) With the new monitor substituted for the old, all indications 
specified in paragraph (d)(2) of this section, again must be read. If no 
change has occurred in the indication for any parameter other than the 
indications of the antenna monitor, the new antenna monitor indications 
must be deemed to be those reflecting correct array adjustments.
    (4) If it cannot be established by the observations required in 
paragraph (d)(2) of this section that base current ratios and monitoring 
point values are within the tolerances or limits prescribed by the rules 
and the instrument of authorization, or if the substitution of the new 
antenna monitor for the old results in changes in these parameters, a 
partial proof of performance shall be executed and analyzed in 
accordance with Sec. 73.154.
    (5) An informal letter request for modification of license shall be 
submitted to the FCC, Attention: Audio Services Division, Mass Media 
Bureau in Washington, DC within 30 days of the date of monitor 
replacement. Such request shall specify the make, type, and serial 
number of the replacement monitor, phase and sample current indications, 
and other data obtained pursuant to paragraph (d) of this section.
    (e) The antenna monitor must be calibrated according to the 
manufacturer's instructions as often as necessary to ensure its proper 
operation.

(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, as amended, 1082, as 
amended; 47 U.S.C. 154, 303. Interpret or apply secs. 301, 303, 307, 48 
Stat. 1081, 1082, as amended, 1083, as amended, 47 U.S.C. 301, 303, 307)

[38 FR 1918, Jan. 19, 1973, as amended at 40 FR 15884, Apr. 8, 1975; 40 
FR 25459, June 16, 1975; 40 FR 27939, July 2, 1975; 41 FR 22942, June 8, 
1976; 41 FR 32892, Aug. 6, 1976; 43 FR 4022, Jan. 31, 1978; 45 FR 26062, 
Apr. 17, 1980; 48 FR 38478, Aug. 24, 1983; 49 FR 3999, Feb. 1, 1984; 50 
FR 47054, Nov. 14, 1985; 51 FR 9965, Mar. 24, 1986; 56 FR 64859, Dec. 
12, 1991; 60 FR 55480, Nov. 1, 1995; 63 FR 33876, June 22, 1998]



Sec. 73.72  Operating during the experimental period.

    (a) An AM station may operate during the experimental period (the 
time between midnight and sunrise, local time) on its assigned frequency 
and with its authorized power for the routine testing and maintenance of 
its transmitting system, and for conducting experimentation under an 
experimental authorization, provided no interference is caused to other 
stations maintaining a regular operating schedule within such period.
    (b) No station licensed for ``daytime'' or ``specified hours'' of 
operation may broadcast any regular or scheduled program during this 
period.
    (c) The licensee of an AM station shall operate or refrain from 
operating

[[Page 29]]

its station during the experimental period as directed by the FCC to 
facilitate frequency measurements or for the determination of 
interference.

[43 FR 32780, July 28, 1978, as amended at 56 FR 64859, Dec. 12, 1991]



Sec. 73.88  Blanketing interference.

    The licensee of each broadcast station is required to satisfy all 
reasonable complaints of blanketing interference within the 1 V/m 
contour.

    Note: For more detailed instructions concerning operational 
responsibilities of licensees and permittees under this section, see 
Sec. 73.318 (b), (c) and (d).


[28 FR 13574, Dec. 14, 1963, as amended at 56 FR 64859, Dec. 12, 1991]



Sec. 73.99  Presunrise service authorization (PSRA) and postsunset service authorization (PSSA).

    (a) To provide maximum uniformity in early morning operation 
compatible with interference considerations, and to provide for 
additional service during early evening hours for Class D stations, 
provisions are made for presunrise service and postsunset service. The 
permissible power for presunrise or postsunset service authorizations 
shall not exceed 500 watts, or the authorized daytime or critical hours 
power (whichever is less). Calculation of the permissible power shall 
consider only co-channel stations for interference protection purposes.
    (b) Presunrise service authorizations (PSRA) permit:
    (1) Class D stations operating on Mexican, Bahamian, and Canadian 
priority Class A clear channels to commence PSRA operation at 6 a.m. 
local time and to continue such operation until the sunrise times 
specified in their basic instruments of authorization.
    (2) Class D stations situated outside 0.5 mV/m-50% skywave contours 
of co-channel U.S. Class A stations to commence PSRA operation at 6 a.m. 
local time and to continue such operation until sunrise times specified 
in their basic instruments of authorization.
    (3) Class D stations located within co-channel 0.5 mV/m-50% skywave 
contours of U.S. Class A stations, to commence PSRA operation either at 
6 a.m. local time, or at sunrise at the nearest Class A station located 
east of the Class D station (whichever is later), and to continue such 
operation until the sunrise times specified in their basic instruments 
of authorization.
    (4) Class B and Class D stations on regional channels to commence 
PSRA operation at 6 a.m. local time and to continue such operation until 
local sunrise times specified in their basic instruments of 
authorization.
    (c) Extended Daylight Saving Time Pre-Sunrise Authorizations:
    (1) Between the first Sunday in April and the end of the month of 
April, Class D stations will be permitted to conduct pre-sunrise 
operation beginning at 6 a.m. local time with a maximum power of 500 
watts (not to exceed the station's regular daytime or critical hours 
power), reduced as necessary to comply with the following requirements:
    (i) Full protection is to be provided as specified in applicable 
international agreements.
    (ii) Protection is to be provided to the 0.5 mV/m groundwave signals 
of co-channel U.S. Class A stations; protection to the 0.5 mV/m-50% 
skywave contours of these stations is not required.
    (iii) In determining the protection to be provided, the effect of 
each interfering signal will be evaluated separately. The presence of 
interference from other stations will not reduce or eliminate the 
required protection.
    (iv) Notwithstanding the requirements of paragraph (c)(1) (ii) and 
(iii) of this section, the stations will be permitted to operate with a 
minimum power of 10 watts unless a lower power is required by 
international agreement.
    (2) The Commission will issue appropriate authorizations to Class D 
stations not previously eligible to operate during this period. Class D 
stations authorized to operate during this presunrise period may 
continue to operate under their current authorization.
    (d) Postsunset service authorizations (PSSA) permit:
    (1) Class D stations located on Mexican, Bahamian, and Canadian 
priority Class A clear channels to commence

[[Page 30]]

PSSA operation at sunset times specified in their basic instruments of 
authorization and to continue for two hours after such specified times.
    (2) Class D stations situated outside 0.5 mV/m-50% skywave contours 
of co-channel U.S. Class A stations to commence PSSA operations at 
sunset times specified in their basic instruments of authorization and 
to continue for two hours after such specified times.
    (3) Class D stations located within co-channel 0.5 mV/m-50% skywave 
contours of U.S. Class A stations to commence PSSA operation at sunset 
times specified in their basic instruments of authorization and to 
continue such operation until two hours past such specified times, or 
until sunset at the nearest Class A station located west of the Class D 
station, whichever is earlier. Class D stations located west of the 
Class A station do not qualify for PSSA operation.
    (4) Class D stations on regional channels to commence PSSA operation 
at sunset times specified on their basic instruments of authorization 
and to continue such operation until two hours past such specified 
times.
    (e) Procedural Matters. (1) Applications for PSRA and PSSA operation 
are not required. Instead, the FCC will calculate the periods of such 
operation and the power to be used pursuant to the provisions of this 
section and the protection requirements contained in applicable 
international agreements. Licensees will be notified of permissible 
power and times of operation. Presunrise and Postsunset service 
authority permits operation on a secondary basis and does not confer 
license rights. No request for such authority need be filed. However, 
stations intending to operate PSRA or PSSA shall submit by letter, 
signed as specified in Sec. 73.3513, the following information:
    (i) Licensee name, station call letters and station location,
    (ii) Indication as to whether PSRA operation, PSSA operation, or 
both, is intended by the station,
    (iii) A description of the method whereby any necessary power 
reduction will be achieved.
    (2) Upon submission of the required information, such operation may 
begin without further authority.
    (f) Technical criteria. Calculations to determine whether there is 
objectionable interference will be determined in accordance with the AM 
Broadcast Technical Standards, Secs. 73.182 through 73.190, and 
applicable international agreements. Calculations will be performed 
using daytime antenna systems, or critical hours antenna systems when 
specified on the license. In performing calculations to determine 
assigned power and times for commencement of PSRA and PSSA operation, 
the following standards and criteria will be used:
    (1) Class D stations operating in accordance with paragraphs (b)(1), 
(b)(2), (d)(1), and (d)(2) of this section are required to protect the 
nighttime 0.5 mV/m-50% skywave contours of co-channel Class A stations. 
Where a 0.5 mV/m-50% skywave signal from the Class A station is not 
produced, the 0.5 mV/m groundwave contour shall be protected.
    (2) Class D stations are required to fully protect foreign Class B 
and Class C stations when operating PSRA and PSSA; Class D stations 
operating PSSA are required to fully protect U.S. Class B stations. For 
purposes of determining protection, the nighttime RSS limit will be used 
in the determination of maximum permissible power.
    (3) Class D stations operating in accordance with paragraphs (d)(2) 
and (d)(3) of this section are required to restrict maximum 10% skywave 
radiation at any point on the daytime 0.1 mV/m groundwave contour of a 
co-channel Class A station to 25 V/m. The location of the 0.1 
mV/m contour of the Class A station will be determined by use of Figure 
M3, Estimated Ground Conductivity in the United States. When the 0.1 mV/
m contour extends beyond the national boundary, the international 
boundary shall be considered the 0.1 mV/m contour.
    (4) Class B and Class D stations on regional channels operating PSRA 
and PSSA (Class D only) are required to provide full protection to co-
channel foreign Class B and Class C stations.
    (5) Class D stations on regional channels operating PSSA beyond 6 
p.m.

[[Page 31]]

local time are required to fully protect U.S. Class B stations.
    (6) The protection that Class D stations on regional channels are 
required to provide when operating PSSA until 6 p.m. local time is as 
follows.
    (i) For the first half-hour of PSSA operation, protection will be 
calculated at sunset plus 30 minutes at the site of the Class D station;
    (ii) For the second half-hour of PSSA operation, protection will be 
calculated at sunset plus one hour at the site of the Class D station;
    (iii) For the second hour of PSSA operation, protection will be 
calculated at sunset plus two hours at the site of the Class D station;
    (iv) Minimum powers during the period until 6 p.m. local time shall 
be permitted as follows:

------------------------------------------------------------------------
           Calculated power                  Adjusted minimum power
------------------------------------------------------------------------
From 1 to 45 watts....................  50 watts.
Above 45 to 70 watts..................  75 watts.
Above 70 to 100 watts.................  100 watts.
------------------------------------------------------------------------

    (7) For protection purposes, the nighttime 25% RSS limit will be 
used in the determination of maximum permissible power.
    (g) Calculations made under paragraph (d) of this section may not 
take outstanding PSRA or PSSA operations into account, nor will the 
grant of a PSRA or PSSA confer any degree of interference protection on 
the holder thereof.
    (h) Operation under a PSRA or PSSA is not mandatory, and will not be 
included in determining compliance with the requirements of 
Sec. 73.1740. To the extent actually undertaken, however, presunrise 
operation will be considered by the FCC in determining overall 
compliance with past programming representations and station policy 
concerning commercial matter.
    (i) The PSRA or PSSA is secondary to the basic instrument of 
authorization with which it is to be associated. The PSRA or PSSA may be 
suspended, modified, or withdrawn by the FCC without prior notice or 
right to hearing, if necessary to resolve interference conflicts, to 
implement agreements with foreign governments, or in other circumstances 
warranting such action. Moreover, the PSRA or PSSA does not extend 
beyond the term of the basic authorization.
    (j) The Commission will periodically recalculate maximum permissible 
power and times for commencing PSRA and PSSA for each Class D station 
operating in accordance with paragraph (c) of this section. The 
Commission will calculate the maximum power at which each individual 
station may conduct presunrise operations during extended daylight 
saving time and shall issue conforming authorizations. These original 
notifications and subsequent notifications should be associated with the 
station's authorization. Upon notification of new power and time of 
commencing operation, affected stations shall make necessary adjustments 
within 30 days.
    (k) A PSRA and PSSA does not require compliance with Secs. 73.45, 
73.182 and 73.1560 where the operation might otherwise be considered as 
technically substandard. Further, the requirements of paragraphs (a)(5), 
(b)(2), (c)(2), and (d)(2) of Sec. 73.1215 concerning the scale ranges 
of transmission system indicating instruments are waived for PSRA and 
PSSA operation except for the radio frequency ammeters used in 
determining antenna input power.
    (1) A station having an antenna monitor incapable of functioning at 
the authorized PSRA and PSSA power when using a directional antenna 
shall take the monitor reading using an unmodulated carrier at the 
authorized daytime power immediately prior to commencing PSRA or PSSA 
operations. Special conditions as the FCC may deem appropriate may be 
included for PSRA or PSSA to insure operation of the transmitter and 
associated equipment in accordance with all phases of good engineering 
practice.

[56 FR 64860, Dec. 12, 1991; 57 FR 43290, Sept. 18, 1992, as amended at 
58 FR 27950, May 12, 1993]



Sec. 73.127  Use of multiplex transmission.

    The licensee of an AM broadcast station may use its AM carrier to 
transmit signals not audible on ordinary consumer receivers, for both 
broadcast and non-broadcast purposes subject to the following 
requirements:
    (a) Such use does not disrupt or degrade the station's own programs 
or

[[Page 32]]

the programs of other broadcast stations.
    (b) AM carrier services that are common carrier in nature are 
subject to common carrier regulation. Licensees operating such services 
are required to apply to the FCC for the appropriate authorization and 
to comply with all policies and rules applicable to the service. 
Responsibility for making the initial determinations of whether a 
particular activity is common carriage rests with the AM station 
licensee. Initial determinations by licensees are subject to FCC 
examination and may be reviewed at the FCC's discretion. AM carrier 
services that are private carrier in nature must notify the Licensing 
Division of the Private Radio Bureau at Gettysburg, Pennsylvania 17325, 
by letter, prior to initiating service certifying compliance with 47 CFR 
parts 90 and 94.
    (c) AM carrier services are of a secondary nature under the 
authority of the AM station authorization, and the authority to provide 
such communications services may not be retained or transferred in any 
manner separate from the station's authorization. The grant or renewal 
of an AM station permit or license is not furthered or promoted by 
proposed or past service. The permittee or licensee must establish that 
the broadcast operation is in the public interest wholly apart from the 
subsidiary communications services provided.
    (d) The station identification, delayed recording, and sponsor 
identification announcements required by Secs. 73.1201, 73.1208, and 
73.1212 are not applicable to leased communications services transmitted 
via services that are not of a general broadcast program nature.
    (e) The licensee or permittee must retain control over all material 
transmitted in a broadcast mode via the station's facilities, with the 
right to reject any material that it deems inappropriate or undesirable.
    (f) Installation of the multiplex transmitting equipment must 
conform with the requirements of Sec. 73.1690(e).

[47 FR 25345, June 11, 1982, as amended at 49 FR 34015, Aug. 28, 1984; 
51 FR 41629, Nov. 18, 1986; 51 FR 44478, Dec. 10, 1986]



Sec. 73.128  AM stereophonic broadcasting.

    (a) An Am broadcast station may, without specific authority from the 
FCC, transmit stereophonic programs upon installation of type accepted 
stereophonic transmitting equipment and the necessary measuring 
equipment to determine that the stereophonic transmissions conform to 
the modulation characteristics specified in paragraphs (b) and (c) of 
this section. Stations transmitting stereophonic programs prior to March 
21, 1994 may continue to do so until March 21, 1995 as long as they 
continue to comply with the rules in effect prior to March 21, 1994.
    (b) The following limitations on the transmitted wave must be met to 
insure compliance with the occupied bandwidth limitations, compatibility 
with AM receivers using envelope detectors, and any applicable 
international agreements to which the FCC is a party:
    (1) The transmitted wave must meet the occupied bandwidth 
specifications of Sec. 73.44 under all possible conditions of program 
modulation. Compliance with requirement shall be demonstrated either by 
the following specific modulation tests or other documented test 
procedures that are to be fully described in the application for type 
acceptance and the transmitting equipment instruction manual. (See 
Sec. 2.983(d)(8) and (j)).
    (i) Main channel (L+R) under all conditions of amplitude modulations 
for the stereophonic system but not exceeding amplitude modulation on 
negative peaks of 100%.
    (ii) Stereophonic (L-R) modulated with audio tones of the same 
amplitude at the transmitter input terminals as in paragraph (b)(i) of 
this section but with the phase of either the L or R channel reversed.
    (iii) Left and Right Channel only, under all conditions of 
modulation for the stereophonic system in use but not exceeding 
amplitude modulation on negative peaks of 100%.
    (c) Effective on December 20, 1994, stereophonic transmissions shall 
conform to the following additional modulation characteristics:

[[Page 33]]

    (1) The audio response of the main (L+R) channel shall conform to 
the requirements of the ANSI/EIA-549-1988, NRSC-1 AM Preemphasis/
Deemphasis and Broadcast Transmission Bandwidth Specifications (NRSC-1).
    (2) The left and right channel audio signals shall conform to 
frequency response limitations dictated by ANSI/EIA-549-1988.
    (3) The stereophonic difference (L-R) information shall be 
transmitted by varying the phase of the carrier in accordance with the 
following relationship:
[GRAPHIC] [TIFF OMITTED] TR20DE93.000

    where:

L(t)=audio signal left channel,
R(t)=audio signal right channel,
m=modulation factor, and
mpeak(L(t)+R(t))=1 for 100% amplitude modulation,
mpeak(L(t)-R(t))=1 for 100% phase modulation.

    (4) The carrier phase shall advance in a positive direction when a 
left channel signal causes the transmitter envelope to be modulated in a 
positive direction. The carrier phase shall likewise retard (negative 
phase change) when a right channel signal causes the transmitter 
envelope to be modulated in a positive direction. The phase modulation 
shall be symmetrical for the condition of difference (L-R) channel 
information sent without the presence of envelope modulation.
    (5) Maximum angular modulation, which occurs on negative peaks of 
the left or right channel with no signal present on the opposite channel 
(L(t)=-0.75, R(t)=0, or R(t)=-0.75, L(t)=0) shall not exceed 1.25 
radians.
    (6) A peak phase modulation of +/-0.785 radians under the condition 
of difference (L-R) channel modulation and the absence of envelope (L+R) 
modulation and pilot signal shall represent 100% modulation of the 
difference channel.
    (7) The composite signal shall contain a pilot tone for indication 
of the presence of stereophonic information. The pilot tone shall 
consist of a 25 Hz tone, with 3% or less total harmonic distortion and a 
frequency tolerance of +/- 0.1 H2, which modulates the 
carrier phase +/- 0.05 radians peak, corresponding to 5% L-R modulation 
when no other modulation is present. The injection level shall be 5%, 
with a tolerance of +1, -1%.
    (8) The composite signal shall be described by the following 
expression:
[GRAPHIC] [TIFF OMITTED] TR20DE93.001


[[Page 34]]


    where:

A=the unmodulated carrier voltage
m=the modulation index
Csn=the magnitude of the nth term of the sum signal
Cdn=the magnitude of the nth term of the difference signal
sn=the nth order angular velocity of the sum signal
dn=the nth order angular velocity of the difference 
    signal
c=the angular velocity of the carrier
[GRAPHIC] [TIFF OMITTED] TR20DE93.002

Asn and Bsn are the nth sine and cosine 
    coefficients of Csn
Adn and Bdn are the nth sine and cosine 
    coefficients of Cdn

[58 FR 66301, Dec. 20, 1993]



Sec. 73.132  Territorial exclusivity.

    No licensee of an AM broadcast station shall have any arrangement 
with a network organization which prevents or hinders another station 
serving substantially the same area from broadcasting the network's 
programs not taken by the former station, or which prevents or hinders 
another station serving a substantially different area from broadcasting 
any program of the network organization: Provided, however, That this 
section does not prohibit arrangements under which the station is 
granted first call within its primary service area upon the network's 
programs. The term ``network organization'' means any organization 
originating program material, with or without commercial messages, and 
furnishing the same to stations interconnected so as to permit 
simultaneous broadcast by all or some of them. However, arrangements 
involving only stations under common ownership, or only the rebroadcast 
by one station or programming from another with no compensation other 
than a lump-sum payment by the station rebroadcasting, are not 
considered arrangements with a network organization. The term 
``arrangement'' means any contract, arrangement or understanding, 
expressed or implied.

[42 FR 16422, Mar. 28, 1977]



Sec. 73.150  Directional antenna systems.

    (a) For each station employing a directional antenna, all 
determinations of service provided and interference caused shall be 
based on the inverse distance fields of the standard radiation pattern 
for that station. (As applied to nighttime operation the term ``standard 
radiation pattern'' shall include the radiation pattern in the 
horizontal plane, and radiation patterns at angles above this plane.)
    (1) Parties submitting directional antenna patterns pursuant to this 
section and Sec. 73.152 (Modified standard pattern) must submit patterns 
which are tabulated and plotted in units of millivolts per meter at 1 
kilometer.

    Note:  Applications for new stations and for changes (both minor and 
major) in existing stations must use a standard pattern.

    (b) The following data shall be submitted with an application for 
authority to install a directional antenna:
    (1) The standard radiation pattern for the proposed antenna in the 
horizontal

[[Page 35]]

plane, and where pertinent, tabulated values for the azimuthal radiation 
patterns for angles of elevation up to and including 60 degrees, with a 
separate section for each increment of 5 degrees.
    (i) The standard radiation pattern shall be based on the theoretical 
radiation pattern. The theoretical radiation pattern shall be calculated 
in accordance with the following mathematical expression:
[GRAPHIC] [TIFF OMITTED] TC13NO91.014


where:

E(,)th Represents the 
          theoretical inverse distance fields at one kilometer for the 
          given azimuth and elevation.
k  Represents the multiplying constant which determines the basic 
          pattern size. It shall be chosen so that the effective field 
          (RMS) of the theoretical pattern in the horizontal plane shall 
          be no greater than the value computed on the assumption that 
          nominal station power (see Sec. 73.14) is delivered to the 
          directional array, and that a lumped loss resistance of one 
          ohm exists at the current loop of each element of the array, 
          or at the base of each element of electrical height lower than 
          0.25 wavelength, and no less than the valuerequired by 
          Sec. 73.189(b)(2) of this part for a station of the class and 
          nominal power for which the pattern is designed.
n  Represents the number of elements (towers) in the directional array.
i  Represents the ith element in the array.
Fi  Represents the field ratio of the ith element 
          in the array.
i (th antenna. This value 
          depends on the tower height, as well as whether the tower is 
          top-loaded or sectionalized. The various formulas for 
          computing fi (i  Represents the electrical spacing of the ith 
          tower from the reference point.
i  Represents the orientation (with respect to true 
          north) of the ith tower.
  Represents the azimuth (with respect to true north).
i  Represents the electrical phase angle of the 
          current in the ith tower.
    The standard radiation pattern shall be constructed in accordance 
with the following mathematical expression:
[GRAPHIC] [TIFF OMITTED] TC01MR91.063

    where:
    E(,)std represents the inverse 
distance fields at one kilometer which are produced by the directional 
antenna in the horizontal and vertical planes. 
E(,)th represents the theoretical inverse 
distance fields at one kilometer as computed in accordance with Eq. 1, 
above.
    Q is the greater of the following two quantities: 0.025g() 
Erss or 10.0g()  PkW
    where:
    g() is the vertical plane distribution factor, 
f(), for the shortest element in the array (see Eq. 2, above; 
also see Sec. 73.190, Figure 5). If the shortest element has an 
electrical height in excess of 0.5 wavelength, g() shall be 
computed as follows:
[GRAPHIC] [TIFF OMITTED] TC01MR91.064

    Erss is the root sum square of the amplitudes of the 
inverse fields of the elements of the array in the horizontal plane, as 
used in the expression for E(,)th (see 
Eq. 1, above), and is computed as follows:
[GRAPHIC] [TIFF OMITTED] TC01MR91.065

    PkW is the nominal station power expressed in kilowatts, 
see Sec. 73.14. If the nominal power is less than one kilowatt, 
PkW=1.


[[Page 36]]


    (ii) Where the orthogonal addition of the factor Q to 
E(,)th results in a standard pattern 
whose minimum fields are lower than those found necessary or desirable, 
these fields may be increased by appropriate adjustment of the 
parameters of E(,)th.
    (2) All patterns shall be computed for integral multiples of five 
degrees, beginning with zero degrees representing true north, and, shall 
be plotted to the largest scale possible on unglazed letter-size paper 
(main engraving approximately 7"  x  10") using only scale divisions and 
subdivisions of 1,2,2.5, or 5 times 10nth. The horizontal 
plane pattern shall be plotted on polar coordinate paper, with the zero 
degree point corresponding to true north. Patterns for elevation angles 
above the horizontal plane may be plotted in polar or rectangular 
coordinates, with the pattern for each angle of elevation on a separate 
page. Rectangular plots shall begin and end at true north, with all 
azimuths labelled in increments of not less than 20 degrees. If a 
rectangular plot is used, the ordinate showing the scale for radiation 
may be logarithmic. Such patterns for elevation angles above the 
horizontal plane need be submitted only upon specific request by 
Commission staff. Minor lobe and null detail occurring between 
successive patterns for specific angles of elevation need not be 
submitted. Values of field strength on any pattern less than ten percent 
of the maximum field strength plotted on that pattern shall be shown on 
an enlarged scale. Rectangular plots with a logarithmic ordinate need 
not utilize an expanded scale unless necessary to show clearly the minor 
lobe and null detail.
    (3) The effective (RMS) field strength in the horizontal plane of 
E(,)std, 
E(,)th and the root-sum-square (RSS) 
value of the inverse distance fields of the array elements at 1 
kilometer, derived from the equation for 
E(,)th. These values shall be tabulated 
on the page on which the horizontal plane pattern is plotted, which 
shall be specifically labelled as the Standard Horizontal Plane Pattern.
    (4) Physical description of the array, showing:
    (i) Number of elements.
    (ii) Type of each element (i.e., guyed or self-supporting, uniform 
cross section or tapered (specifying base dimensions), grounded or 
insulated, etc.)
    (iii) Details of top loading, or sectionalizing, if any.
    (iv) Height of radiating portion of each element in feet (height 
above base insulator, or base, if grounded).
    (v) Overall height of each element above ground.
    (vi) Sketch of antenna site, indicating its dimensions, the location 
of the antenna elements, thereon, their spacing from each other, and 
their orientation with respect to each other and to true north, the 
number and length of the radials in the ground system about each 
element, the dimensions of ground screens, if any, and bonding between 
towers and between radial systems.
    (5) Electrical description of the array, showing:
    (i) Relative amplitudes of the fields of the array elements.
    (ii) Relative time phasing of the fields of the array elements in 
degrees leading [+] or lagging [-].
    (iii) Space phasing between elements in degrees.
    (iv) Where waiver of the content of this section is requested or 
upon request of the Commission staff, all assumptions made and the basis 
therefor, particularly with respect to the electrical height of the 
elements, current distribution along elements, efficiency of each 
element, and ground conductivity.
    (v) Where waiver of the content of this section is requested, or 
upon request of the Commission staff, those formulas used for computing 
E(,)th and 
E(,)std. Complete tabulation of final 
computed data used in plotting patterns, including data for the 
determination of the RMS value of the pattern, and the RSS field of the 
array.
    (6) The values used in specifying the parameters which describe the 
array must be specified to no greater precision than can be achieved 
with available monitoring equipment. Use of greater precision raises a 
rebuttable presumption of instability of the array. Following are 
acceptable values of precision; greater precision may be used only upon 
showing that the monitoring

[[Page 37]]

equipment to be installed gives accurate readings with the specified 
precision.
    (i) Field Ratio: 3 significant figures.
    (ii) Phasing: to the nearest 0.1 degree.
    (iii) Orientation (with respect to a common point in the array, or 
with respect to another tower): to the nearest 0.1 degree.
    (iv) Spacing (with respect to a common point in the array, or with 
respect to another tower): to the nearest 0.1 degree.
    (v) Electrical Height (for all parameters listed in Section 73.160): 
to the nearest 0.1 degree.
    (vi) Theoretical RMS (to determine pattern size): 4 significant 
figures.
    (vii) Additional requirements relating to modified standard patterns 
appear in Sec. 73.152(c)(3) and (c)(4).
    (7) Any additional information required by the application form.
    (c) Sample calculations for the theoretical and standard radiation 
follow. Assume a five kilowatt (nominal power) station with a 
theoretical RMS of 685 mV/m at one kilometer. Assume that it is an in-
line array consisting of three towers. Assume the following parameters 
for the towers:

------------------------------------------------------------------------
                                 Field   Relative  Relative    Relative
             Tower               ratio    phasing   spacing  orientation
------------------------------------------------------------------------
1.............................     1.0     -128.5       0.0        0.0
2.............................     1.89       0.0     110.0      285.0
3.............................     1.0      128.5     220.0      285.0
------------------------------------------------------------------------

    Assume that tower 1 is a typical tower with an electrical height of 
120 degrees. Assume that tower 2 is top-loaded in accordance with the 
method described in Sec. 73.160(b)(2) where A is 120 electrical degrees 
and B is 20 electrical degrees. Assume that tower 3 is sectionalized in 
accordance with the method described in Sec. 73.160(b)(3) where A is 120 
electrical degrees, B is 20 electrical degrees, C is 220 electrical 
degrees, and D is 15 electrical degrees.
    The multiplying constant will be 323.6.
    Following is a tabulation of part of the theoretical pattern:

------------------------------------------------------------------------
                                                                Vertical
           Azimuth                0          30         60       angle
------------------------------------------------------------------------
0...........................      15.98      62.49      68.20
105.........................    1225.30     819.79     234.54
235.........................       0.43      18.46      34.56
247.........................      82.62      51.52      26.38
------------------------------------------------------------------------

    If we further assume that the station has a standard pattern, we 
find that Q, for 
Sec. 73.151  Field strength measurements to establish performance of directional antennas.

    (a) In addition to the information required by the license 
application form, the following showing must be submitted to establish, 
for each mode of directional operation, that the effective measured 
field strength (RMS) at 1 kilometer (km) is not less than 85 percent of 
the effective measured field strength (RMS) specified for the standard 
radiation pattern, or less than that specified in Sec. 73.189(b) for the 
class of station involved, whichever is the higher value, and that the 
measured field strength at 1 km in any direction does not exceed the 
field shown in that direction on the standard radiation pattern for that 
mode of directional operation:
    (1) A tabulation of inverse field strengths in the horizontal plane 
at 1 km, as determined from field strength measurements taken and 
analyzed in accordance with Sec. 73.186, and a statement of the 
effective measured field strength (RMS). Measurements shall be made in 
at least the following directions:
    (i) Those specified in the instrument of authorization.

[[Page 38]]

    (ii) In major lobes. Generally at least three radials are necessary 
to establish a major lobe; however, additional radials may be required.
    (iii) Along sufficient number of other radials to establish the 
effective field. In the case of a relatively simple directional antenna 
pattern, approximately five radials in addition to those in paragraphs 
(a)(1) (i) and (ii) of this section are sufficient. However, when more 
complicated patterns are involved, that is, patterns having several or 
sharp lobes or nulls, measurements shall be taken along as many radials 
as may be necessary, to definitely establish the pattern(s).
    (2) A tabulation of:
    (i) The phase difference of the current in each other element with 
respect to the reference element, and whether the current leads (+) or 
lags (-) the current in the reference element, as indicated by the 
station's antenna monitor.
    (ii) The ratio of the amplitude of the radio frequency current in 
each other element to the current in the reference element, as indicated 
on the station's antenna monitor.
    (iii) The value of the radio frequency current at the base of each 
element, and the ratio of the current in each other element to the base 
current in the reference element. If there are substantial differences 
between the ratios established in paragraph (a)(2)(ii) of this section 
and the ratios computed in this paragraphs (a)(2)(iii) and/or if there 
are substantial differences between the parameters established in 
paragraphs (a)(2) (i) and (ii) of this section and this paragraph 
(a)(2)(iii), and those used in the design of the standard radiation 
pattern, a full explanation of the reasons for these differences shall 
be given.
    (3) The actual field strength measured at each monitoring point 
established in the various directions for which a limiting field was 
specified in the instrument of authorization together with accurate and 
detailed description of each monitoring point together with ordinary 
snapshots, clear and sharp, taken with the field strength meter in its 
measuring position and with the camera so located that its field of view 
takes in as many pertinent landmarks as possible. In addition, the 
directions for proceeding to each monitoring point together with a rough 
sketch or map upon which has been indicated the most accessible 
approaches to the monitoring points should be submitted.
    (b) For stations authorized to operate with simple directional 
antenna systems (e.g., two towers) in the 1605-1705 kHz band, the 
measurements to support pattern RMS compliance referred to in paragraphs 
(a)(1)(ii) and (a)(1)(iii) of this section are not required. In such 
cases, measured radials are required only in the direction of short-
spaced allotments, or in directions specifically identified by the 
Commission.

[36 FR 919, Jan. 20, 1971, as amended at 42 FR 36828, July 18, 1977; 49 
FR 23348, June 6, 1984; 50 FR 32416, Aug. 12, 1985; 56 FR 64862, Dec. 
12, 1991; 63 FR 33876, June 22, 1998]



Sec. 73.152  Modification of directional antenna data.

    (a) If, after construction and final adjustment of a directional 
antenna, a measured inverse distance field in any direction exceeds the 
field shown on the standard radiation pattern for the pertinent mode of 
directional operation, an application shall be filed, specifying a 
modified standard radiation pattern and/or such changes as may be 
required in operating parameters so that all measured effective fields 
will be contained within the modified standard radiation pattern.
    (b) Normally, a modified standard pattern is not acceptable at the 
initial construction permit stage, before a proof-of-performance has 
been completed. However, in certain cases, where it can be shown that 
modification is necessary, a modified standard pattern will be 
acceptable at the initial construction permit stage. Following is a non-
inclusive list of items to be considered in determining whether a 
modification is acceptable at the initial construction permit stage:
    (1) When the proposed pattern is essentially the same as an existing 
pattern at the same antenna site. (e.g., A DA-D station proposing to 
become a DA-1 station.)
    (2) Excessive reradiating structures, which should be shown on a 
plat of the antenna site and surrounding area.

[[Page 39]]

    (3) Other environmental factors; they should be fully described.
    (4) Judgment and experience of the engineer preparing the 
engineering portion of the application. This must be supported with a 
full discussion of the pertinent factors.
    (c) The following general principles shall govern the situations in 
paragraphs (a) and (b) in this section:
    (1) Where a measured field in any direction will exceed the 
authorized standard pattern, the license application may specify the 
level at which the input power to the antenna shall be limited to 
maintain the measured field at a value not in excess of that shown on 
the standard pattern, and shall specify the common point current 
corresponding to this power level. This value of common point current 
will be specified on the license for that station.
    (2) Where any excessive measured field does not result in 
objectionable interference to another station, a modification of 
construction permit application may be submitted with a modified 
standard pattern encompassing all measured fields. The modified standard 
pattern shall supersede the previously submitted standard radiation 
pattern for that station in the pertinent mode of directional operation. 
Following are the possible methods of creating a modified standard 
pattern:
    (i) The modified pattern may be computed by making the entire 
pattern larger than the original pattern (i.e., have a higher RMS value) 
if the measured fields systematically exceed the confines of the 
original pattern. The larger pattern shall be computed by using a larger 
multiplying constant, k, in the theoretical pattern equation (Eq. 1) in 
Sec. 73.150(b)(1).
    (ii) Where the measured field exceeds the pattern in discrete 
directions, but objectionable interference does not result, the pattern 
may be expanded over sectors including these directions. When this 
``augmentation'' is desired, it shall be achieved by application of the 
following equation:

     E(,aug =  { 
    E(,std }2+ 
             A{g(A/S }2

where:

    E(,std is the standard 
pattern field at some particular azimuth and elevation angle, before 
augmentation, computed pursuant to Eq. 2, Sec. 73.150(b)(1)(i).
    E(,aug. is the field in 
the direction specified above, after augmentation.
    A=E(, 
O)2aug-E(, 
O)2std in which  is the central azimuth 
of augmentation. E(, O)aug and 
E(, O)std are the fields in the 
horizontal plane at the central azimuth of augmentation.

    Note: ``A'' must be positive, except during the process of 
converting non-standard patterns to standard patterns pursuant to the 
Report and Order in Docket No. 21473, and in making minor changes to 
stations with patterns developed during the conversion. However, even 
when ``A'' is negative, ``A'' cannot be so negative that 
E(,)aug is less than 
E(,th at any azimuth or 
vertical elevation angle.


    g(A is the absolute horizontal angle between the azimuth 
at which the augmented pattern value is being computed and the central 
azimuth of augmentation. (DA cannot exceed 1/2 S.)

    In the case where there are spans which overlap, the above formula 
shall be applied repeatedly, once for each augmentation, in ascending 
order of central azimuth of augmentation, beginning with zero degrees 
representing true North. Note that, when spans overlap, there will be, 
in effect, an augmentation of an augmentation. And, if the span of an 
earlier augmentation overlaps the central azimuth of a later 
augmentation, the value of ``A'' for the later augmentation will be 
different than the value of ``A'' without the overlap of the earlier 
span.
    (iii) A combination of paragraphs (c)(2) (i) and (ii), of this 
section, with (i) being applied before (ii) is applied.
    (iv) Where the measured inverse distance field exceeds the value 
permitted by the standard pattern, and augmentation is allowable under 
the terms of this section, the requested amount of augmentation shall be 
centered upon the azimuth of the radial upon which the excessive 
radiation was measured and shall not exceed the following:

[[Page 40]]

    (A) The actual measured inverse distance field value, where the 
radial does not involve a required monitoring point.
    (B) 120% of the actual measured inverse field value, where the 
radial has a monitoring point required by the instrument of 
authorization.

Whereas some pattern smoothing can be accommodated, the extent of the 
requested span(s) shall be minimized and in no case shall a requested 
augmentation span extend to a radial azimuth for which the analyzed 
measurement data does not show a need for augmentation.
    (3) A Modified Standard Pattern shall be specifically labeled as 
such, and shall be plotted in accordance with the requirements of 
paragraph (b)(2) of Sec. 73.150. The effective (RMS) field strength in 
the horizontal plane of E(,)std, 
E(,)th, and the root sum square 
(RSS) value of the inverse fields of the array elements (derived from 
the equation for E(,)th), shall 
be tabulated on the page on which the horizontal plane pattern is 
plotted. Where sector augmentation has been employed in designing the 
modified pattern, the direction of maximum augmentation (i.e., the 
central azimuth of augmentation) shall be indicated on the horizontal 
plane pattern for each augmented sector, and the limits of each sector 
shall also be shown. Field values within an augmented sector, computed 
prior to augmentation, shall be depicted by a broken line.
    (4) There shall be submitted, for each modified standard pattern, 
complete tabulations of final computed data used in plotting the 
pattern. In addition, for each augmented sector, the central azimuth of 
augmentation, span, and radiation at the central azimuth of augmentation 
(E(,)aug) shall be tabulated.
    (5) The parameters used in computing the modified standard pattern 
shall be specified with realistic precision. Following is a list of the 
maximum acceptable precision:
    (i) Central Azimuth of Augmentation: to the nearest 0.1 degree.
    (ii) Span: to the nearest 0.1 degree.
    (iii) Radiation at Central Azimuth of Augmentation: 4 significant 
figures.
    (d) Sample calculations for a modified standard pattern follow. 
First, assume the existing standard pattern in Sec. 73.150(c). Then, 
assume the following augmentation parameters:

------------------------------------------------------------------------
                                                               Radiation
                                             Central               at
            Augmentation number              azimuth    Span    central
                                                                azimuth
------------------------------------------------------------------------
1..........................................      110       40      1,300
2..........................................      240       50         52
3..........................................      250       10        130
------------------------------------------------------------------------

    Following is a tabulation of part of the modified standard pattern:

------------------------------------------------------------------------
                                                                Vertical
           Azimuth                0          30         60       angle
------------------------------------------------------------------------
0...........................      28.86      68.05      72.06  .........
105.........................   1,299.42     872.14     254.21  .........
235.........................      39.00      35.74      38.71  .........
247.........................     100.47      66.69      32.78  .........
------------------------------------------------------------------------


[46 FR 11992, Feb. 12, 1981, as amended at 56 FR 64862, Dec. 12, 1991]



Sec. 73.153  Field strength measurements in support of applications or evidence at hearings.

    In the determination of interference, groundwave field strength 
measurements will take precedence over theoretical values, provided such 
measurements are properly taken and presented. When measurements of 
groundwave signal strength are presented, they shall be sufficiently 
complete in accordance with Sec. 73.186 to determine the field strength 
at 1 mile in the pertinent directions for that station. The antenna 
resistance measurements required by Sec. 73.186 need not be taken or 
submitted.

[44 FR 36037, June 20, 1979, as amended at 56 FR 64862, Dec. 12, 1991]



Sec. 73.154  AM directional antenna partial proof of performance measurements.

    (a) A partial proof of performance consists of at least 10 field 
strength measurements made on each of the radials established in the 
latest complete proof of performance of the directional antenna system.
    (b) The measurements are to be made within 2 to 10 miles (3 to 16 
kilometers) from the center of the antenna array. When a monitoring 
point as designated on the station authorization is on a particular 
radial, one of the radial

[[Page 41]]

measurements must be made at that point.
    (c) The results of the measurements are to be analyzed in either of 
two methods. Either the arithmetic average or the logarithmic average of 
the ratios of the field strength at each measurement point along each 
radial to the corresponding field strength in the most recent complete 
proof of performance may be used to establish the inverse distance 
fields. (The logarithmic average for each radial is the antilogarithm of 
the mean of the logarithms of the ratios of field strength (new to old) 
for each measurement location along a given radial).
    (d) The result of the most recent partial proof of performance 
measurements and analysis is to be retained in the station records 
available to the FCC upon request.

[50 FR 47054, Nov. 14, 1985]



Sec. 73.157  Antenna testing during daytime.

    (a) The licensee of a station using a directional antenna during 
daytime or nighttime hours may, without further authority, operate 
during daytime hours with the licensed nighttime directional facilities 
or with a nondirectional antenna when conducting monitoring point field 
strength measurements or antenna proof of performance measurements.
    (b) Operation pursuant to this section is subject to the following 
conditions:
    (1) No harmful interference will be caused to any other station.
    (2) The FCC may notify the licensee to modify or cease such 
operation to resolve interference complaints or when such action may 
appear to be in the public interest, convenience and necessity.
    (3) Such operation shall be undertaken only for the purpose of 
taking monitoring point field strength measurements or antenna proof of 
performance measurements, and shall be restricted to the minimum time 
required to accomplish the measurements.
    (4) Operating power in the nondirectional mode shall be adjusted to 
the same power as was utilized for the most recent nondirectional proof 
of performance covering the licensed facilities.

[50 FR 30947, July 31, 1985]



Sec. 73.158  Directional antenna monitoring points.

    (a) When a licensee of a station using a directional antenna system 
finds that a field monitoring point, as specified on the station 
authorization, is no longer accessible for use or is unsuitable because 
of nearby construction or other disturbances to the measured field, an 
informal application to change the monitoring point location is to be 
promptly submitted to the FCC in Washington, DC. The application must 
include the following information:
    (1) A partial proof of performance conducted on the radial 
containing the monitoring point to be changed.
    (2) A written description of the routing to the new selected 
monitoring point.
    (3) A map showing the location and routing to the new selected 
monitoring point.
    (4) A photograph showing the new monitoring point in relation to 
nearby permanent landmarks that can be used in locating the point 
accurately at all times throughout the year. Do not use seasonal or 
temporary features in either the written descriptions or photographs as 
landmarks for locating field points.
    (b) When the descriptive routing to reach any of the monitoring 
points as shown on the station license is no longer correct due to road 
or building construction or other changes, the licensee must prepare and 
file with the FCC, in Washington, DC, a request for a corrected station 
license showing the new routing description. A copy of the description 
is to be posted with the existing station license. The notification is 
to include the information specified in paragraphs (a) (2) and (3) of 
this section.

[47 FR 28387, June 30, 1982]



Sec. 73.160  Vertical plane radiation characteristics, f(, is 0 degrees in the horizontal plane, and 90 
degrees when perpendicular to the horizontal plane. The vertical plane 
radiation characteristic is referred to as f(.
    E(O) is the radiation from the tower in the horizontal plane.

    (b) Listed below are formulas for f( is the difference between H and A; H-A.

    See Figure 2 of this section.

[[Page 45]]

[GRAPHIC] [TIFF OMITTED] TC01MR91.067

    (c) One of the above f(=115 
electrical degrees (235-120):

------------------------------------------------------------------------
                         
Sec. 73.182  Engineering standards of allocation.

    (a) Sections 73.21 to 73.37, inclusive, govern allocation of 
facilities in the AM broadcast band 535-1705 kHz. Sec. 73.21 establishes 
three classes of channels in this band, namely, clear, regional and 
local. The classes and power of AM broadcast stations which will be 
assigned to the various channels are set forth in Sec. 73.21. The 
classifications of the AM broadcast stations are as follows:
    (1) Class A stations operate on clear channels with powers no less 
than 10kW nor greater than 50 kW. These stations are designed to render 
primary and secondary service over an extended area, with their primary 
services areas protected from objectionable interference from other 
stations on the same and adjacent channels. Their secondary service 
areas are protected from objectionable interference from co-channel 
stations. For purposes of protection, Class A stations may be divided 
into two groups, those located in any of the contiguous 48 States and 
those located in Alaska in accordance with Sec. 73.25.
    (i) The mainland U.S. Class A stations are those assigned to the 
channels allocated by Sec. 73.25. The power of these stations shall be 
50 kW. The Class A stations in this group are afforded protection as 
follows:
    (A) Daytime. To the 0.1 mV/m groundwave contour from stations on the 
same channel, and to the 0.5 mV/m groundwave contour from stations on 
adjacent channels.
    (B) Nighttime. To the 0.5 mV/m-50% skywave contour from stations on 
the same channels.
    (ii) Class A stations in Alaska operate on the channels allocated by 
Sec. 73.25 with a minimum power of 10 kW, a maximum power of 50 kW, and 
an antenna efficiency of 282 mV/m/kW at 1 kilometer. Stations operating 
on these channels in Alaska which have not been designated as Class A 
stations in response to licensee request will continue to be considered 
as Class B stations. During daytime hours a Class A station in Alaska is 
protected to the 100 V/m groundwave contour from co-channel 
stations. During nighttime hours, a Class A station in Alaska is 
protected to the 100 V/m-50 percent skywave contour from co-
channel stations. The 0.5 mV/m groundwave contour is protected both 
daytime and nighttime from stations on adjacent channels.

    Note: In the Report and Order in MM Docket No. 83-807, the 
Commission designated 15 stations operating on U.S. clear channels as 
Alaskan Class A stations. Eleven of these stations already have Alaskan 
Class A facilities and are to be protected accordingly. Permanent 
designation of the other

[[Page 47]]

four stations as Alaskan Class A is conditioned on their constructing 
minimum Alaskan Class A facilities no later than December 31, 1989. 
Until that date or until such facilities are obtained, these four 
stations shall be temporarily designated as Alaskan Class A stations, 
and calculations involving these stations should be based on existing 
facilities but with an assumed power of 10 kW. Thereafter, these 
stations are to beprotected based on their actual Alaskan Class A 
facilities. If any of these stations does not obtain Alaskan Class A 
facilities in the period specified, it is to be protected as a Class B 
station based on its actual facilities. These four stations may increase 
power to 10 kW without regard to the impact on co-channel Class B 
stations. However, power increases by these stations above 10 kW (or by 
existing Alaskan Class A stations beyond their current power level) are 
subject to applicable protection requirements for co-channel Class B 
stations. Other stations not on the original list but which meet 
applicable requirements may obtain Alaskan Class A status by seeking 
such designation from the Commission. If a power increase or other 
change in facilities by a station not on the original list is required 
to obtain minimum Alaskan Class A facilities, any such application shall 
meet the interference protection requirements applicable to an Alaskan 
Class A proposal on the channel.

    (2) Class B stations are stations which operate on clear and 
regional channels with powers not less than 0.25 kW nor more than 50 kW. 
These stations render primary service only, the area of which depends on 
their geographical location, power, and frequency. It is recommended 
that Class B stations be located so that the interference received from 
other stations will not limit the service area to a groundwave contour 
value greater than 2.0 mV/m nighttime and to the 0.5 mV/m groundwave 
contour daytime, which are the values for themutual protection between 
this class of stations and other stations of the same class.

    Note: See Secs. 73.21(b)(1) and 73.26(b) concerning power 
restrictions and classifications relative to Class B, Class C, and Class 
D stations in Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands. 
Stations in the above-named places that are reclassified from Class C to 
Class B stations under Sec. 73.26(b) shall not be authorized to increase 
power to levels that would increase the nighttime interference-free 
limit of co-channel Class C stations in the conterminous United States.

    (3) Class C stations operate on local channels, normally rendering 
primary service to a community and the suburban or rural areas 
immediately contiguous thereto, with powers not less than 0.25 kW, nor 
more than 1 kW, except as provided in Sec. 73.21(c)(1). Such stations 
are normally protected to the daytime 0.5 mV/m contour. On local 
channels the separation required for the daytime protection shall also 
determine the nighttime separation. Where directional antennas are 
employed daytime by Class C stations operating with more than 0.25 kW 
power, the separations required shall in no case be less than those 
necessary to afford protection, assuming nondirectional operation with 
0.25 kW. In no case will 0.25 kW or greater nighttime power be 
authorized to a station unable to operate nondirectionally with a power 
of 0.25 kW during daytime hours. The actual nighttime limitation will be 
calculated. Fornighttime protection purposes, Class C stations in the 48 
contiguous United States may assume that stations in Alaska, Hawaii, 
Puerto Rico, and the U.S. Virgin Islands operating on 1230, 1240, 1340, 
1400, 1450, and 1490 kHz are Class C stations.
    (4) Class D stations operate on clear and regional channels with 
daytime powers of not less than 0.25 kW (or equivalent RMS field of 141 
mV/m at one kilometer if less than 0.25 kW) and not more than 50 kW. 
Class D stations that have previously received nighttime authority 
operate with powers of less than 0.25 kW (or equivalent RMS fields of 
less than 141 mV/m at one kilometer) are not required to provide 
nighttime coverage in accordance with Sec. 73.24(j) and are not 
protected from interference during nighttime hours. Such nighttime 
authority is permitted on the basis of full nighttime protection being 
afforded to all Class A and Class B stations.
    (b) When a station is already limited by interference from other 
stations to a contour value greater than that normally protected for its 
class, the individual received limits shall be the established standard 
for such station with respect to interference from each other station.
    (c) The four classes of AM broadcast stations have in general three 
types of

[[Page 48]]

service areas, i.e., primary, secondary and intermittent. (See 
Sec. 73.14 for the definitions of primary, secondary, and intermittent 
service areas.) Class A stations render service to all three areas. 
Class B stations render service to a primary area but the secondary and 
intermittent service areas may be materially limited or destroyed due to 
interference from other stations, depending on the station assignments 
involved. Class C and Class D stations usually have only primary service 
areas. Interference from other stations may limit intermittent service 
areas and generally prevents any secondary service to those stations 
which operate at night. Complete intermittent service may still be 
obtained in many cases depending on the station assignments involved.
    (d) The groundwave signal strength required to render primary 
service is 2 mV/m for communities with populations of 2,500 or more and 
0.5 mV/m for communities with populations of less than 2,500. See 
Sec. 73.184 for curves showing distance to various groundwave field 
strength contours for different frequencies and ground conductivities, 
and also see Sec. 73.183, ``Groundwave signals.''
    (e) A Class C station may be authorized to operate with a 
directional antenna during daytime hours providing the power is at least 
0.25 kW. In computing the degrees of protection which such antenna will 
afford, the radiation produced by the directional antenna system will be 
assumed to be no less, in any direction, than that which would result 
from non-directional operation using a single element of the directional 
array, with 0.25 kW.
    (f) All classes of broadcast stations have primary service areas 
subject to limitation by fading and noise, and interference from other 
stations to the contours set out for each class of station.
    (g) Secondary service is provided during nighttime hours in areas 
where the skywave field strength, 50% or more of the time, is 0.5 mV/m 
or greater (0.1 mV/m in Alaska). Satisfactory secondary service to 
cities is not considered possible unless the field strength of the 
skywave signal approaches or exceeds the value of the groundwave field 
strength that is required for primary service. Secondary service is 
subject to some interference and extensive fading whereas the primary 
service area of a station is subject to no objectionable interference or 
fading. Only Class A stations are assigned on the basis of rendering 
secondary service.

    Note: Standards have not been established for objectionable fading 
because of the relationship to receiver characteristics. Selective 
fading causes audio distortion and signal strength reduction below the 
noise level, objectionable characteristics inherent in many modern 
receivers. The AVC circuits in the better designed receivers generally 
maintain the audio output at a sufficiently constant level to permit 
satisfactory reception during most fading conditions.

    (h) Intermittent service is rendered by the groundwave and begins at 
the outer boundary of the primary service area and extends to a distance 
where the signal strength decreases to a value that is too low to 
provide any service. This may be as low as a few V/m in certain 
areas and as high as several millivolts per meter in other areas of high 
noise level, interference from other stations, or objectionable fading 
at night. The intermittent service area may vary widely from day to 
night and generally varies over shorter intervals of time. Only Class A 
stations are protected from interference from other stations to the 
intermittent service area.
    (i) Broadcast stations are licensed to operate unlimited time, 
limited time, daytime, share time, and specified hours. (See 
Secs. 73.1710, 73.1725, 73.1720, 73.1715, and 73.1730.) Applications for 
new stations shall specify unlimited time operation only.
    (j) Section 73.24 sets out the general requirements for modifying 
the facilities of a licensed station and for establishing a new station. 
Sections 73.24(b) and 73.37 include interference related provisions that 
be considered in connection with an application to modify the facilities 
of an existing station or to establish a new station. Section 73.30 
describes the procedural steps required to receive an authorization to 
operate in the 1605-1705 kHz band.
    (k) Objectionable nighttime interference from a broadcast station 
occurs

[[Page 49]]

when, at a specified field strength contour with respect to the desired 
station, the field strength of an undesired station (co-channel or first 
adjacent channel, after application of proper protection ratio) exceeds 
for 10% or more of the time the values set forth in these standards. The 
value derived from the root-sum-square of all interference contributions 
represents the extent of a station's interference-free coverage.
    (1) With respect to the root-sum-square (RSS) values of interfering 
field strengths referred to in this section, calculation of nighttime 
interference-free service is accomplished by considering the signals on 
the three channels of concern (co- and first adjacencies) in order of 
decreasing magnitude, adding the squares of the values and extracting 
the square root of the sum, excluding those signals which are less than 
50% of the RSS values of the higher signals already included.
    (2) With respect to the root-sum-square values of interfering field 
strengths referred to in this section, calculation of nighttime 
interference for non-coverage purposes is accomplished by considering 
the signals on the three channels of concern (co- and first adjacencies) 
in order of decreasing magnitude, adding the squares of the values and 
extracting the square root of the sum, excluding those signals which are 
less than 25% of the RSS values of the higher signals already included.
    (3) With respect to the root-sum-square values of interfering field 
strengths referred to in this section, calculation is accomplished by 
considering the signals on the three channels of concern (co- and first 
adjacencies) in order of decreasing magnitude, adding the squares of the 
values and extracting the square root of the sum. The 0% exclusion 
method applies only to the determination of an improvement factor value 
for evaluating a station's eligibility for migration to the band 1605-
1705 kHz.
    (4) The RSS value will not be considered to be increased when a new 
interfering signal is added which is less than the appropriate exclusion 
percentage as applied to the RSS value of the interference from existing 
stations, and which at the same time is not greater than the smallest 
signal included in the RSS value of interference from existing stations.
    (5) It is recognized that application of the above ``50% exclusion'' 
method (or any exclusion method using a per cent value greater than 
zero) of calculating the RSS interference may result in some cases in 
anomalies wherein the addition of a new interfering signal or the 
increase in value of an existing interfering signal will cause the 
exclusion of a previously included signal and may cause a decrease in 
the calculated RSS value of interference. In order to provide the 
Commission with more realistic information regarding gains and losses in 
service (as a basis for determination of the relative merits of a 
proposed operation) the following alternate method for calculating the 
proposed RSS values of interference will be employed wherever 
applicable.
    (6) In the cases where it is proposed to add a new interfering 
signal which is not less than 50% (or 25%, depending on which study is 
being performed) of the RSS value of interference from existing stations 
or which is greater that the smallest signal already included to obtain 
this RSS value, the RSS limitation after addition of the new signal 
shall be calculated without excluding any signal previously included. 
Similarly, in cases where it is proposed to increase the value of one of 
the existing interfering signals which has been included in the RSS 
value, the RSS limitation after the increase shall be calculated without 
excluding the interference from any source previously included.
    (7) If the new or increased signal proposed in such cases is 
ultimately authorized, the RSS values of interference to other stations 
affected will thereafter be calculated by the ``50% exclusion'' (or 25% 
exclusion, depending on which study is being performed) method without 
regard to this alternate method of calculation.
    (8) Examples of RSS interference calculations:
    (i) Existing interferences:

    Station No. 1--1.00 mV/m.
    Station No. 2--0.60 mV/m.
    Station No. 3--0.59 mV/m.
    Station No. 4--0.58 mV/m.


[[Page 50]]


The RSS value from Nos. 1, 2 and 3 is 1.31 mV/m; therefore interference 
from No. 4 is excluded for it is less than 50% of 1.31 mV/m.

    (ii) Station A receives interferences from:

    Station No. 1--1.00 mV/m.
    Station No. 2--0.60 mV/m.
    Station No. 3--0.59 mV/m.

It is proposed to add a new limitation, 0.68 mV/m. This is more than 50% 
of 1.31 mV/m, the RSS value from Nos. 1, 2 and 3. The RSS value of 
Station No. 1 and of the proposed station would be 1.21 m/Vm which is 
more than twice as large as the limitation from Station No. 2 or No. 3. 
However, under the above provision the new signal and the three existing 
interferences are nevertheless calculated for purposes of comparative 
studies, resulting in an RSS value of 1.47 mV/m. However, if the 
proposed station is ultimately authorized, only No. 1 and the new signal 
are included in all subsequent calculations for the reason that Nos. 2 
and 3 are less than 50% of 1.21 mV/m, the RSS value of the new signal 
and No. 1.

    (iii) Station A receives interferences from:

    Station No. 1--1.00 mV/m.
    Station No. 2--0.60 mV/m.
    Station No. 3--0.59 mV/m.

No. 1 proposes to increase the limitation it imposes on Station A to 
1.21 mV/m. Although the limitations from stations Nos. 2 and 3 are less 
than 50% of the 1.21 mV/m limitation, under the above provision they are 
nevertheless included for comparative studies, and the RSS limitation is 
calculated to be 1.47 mV/m. However, if the increase proposed by Station 
No. 1 is authorized, the RSS value then calculated is 1.21 mV/m because 
Stations Nos. 2 and 3 are excluded in view of the fact that the 
limitations they impose are less than 50% of 1.21 mV/m.

    Note: The principles demonstrated in the previous examples for the 
calculation of the 50% exclusion method also apply to calculations using 
the 25% exclusion method after appropriate adjustment.

    (l) Objectionable nighttime interference from a station shall be 
considered to exist to a station when, at the field strength contour 
specified in paragraph (q) of this section with respect to the class to 
which the station belongs, the field strength of an interfering station 
operating on the same channel or on a first adjacent channel after 
signal adjustment using the proper protection ratio, exceeds for 10% or 
more of the time the value of the permissible interfering signal set 
forth opposite such class in paragraph (q) of this section.
    (m) For the purpose of estimating the coverage and the interfering 
effects of stations in the absence of field strength measurements, use 
shall be made of Figure 8 of Sec. 73.190, which describes the estimated 
effective field (for 1 kW power input) of simple vertical 
omnidirectional antennas of various heights with ground systems having 
at least 120 quarter-wavelength radials. Certain approximations, based 
on the curve or other appropriate theory, may be made when other than 
such antennas and ground systems are employed, but in any event the 
effective field to be employed shall not be less than the following:

------------------------------------------------------------------------
              Class of station                Effective field (at 1 km)
------------------------------------------------------------------------
All Class A (except Alaskan)...............  362 mV/m.
Class A (Alaskan), B and D.................  282 mV/m.
Class C....................................  241 mV/m.
------------------------------------------------------------------------
Note (1): When a directional antenna is employed, the radiated signal of
  a broadcasting station will vary in strength in different directions,
  possibly being greater than the above values in certain directions and
  less in other directions depending upon the design and adjustment of
  the directional antenna system. To determine the interference in any
  direction, the measured or calculated radiated field (unattenuated
  field strength at 1 kilometer from the array) must be used in
  conjunction with the appropriate propagation curves. (See Sec.  73.185
  for further discussion and solution of a typical directional antenna
  case.)
Note (2): For Class B stations in Alaska, Hawaii, Puerto Rico and the
  U.S. Virgin Islands, 241 mV/m shall be used.

    (n) The existence or absence of objectionable groundwave 
interference from stations on the same or adjacent channels shall be 
determined by actual measurements made in accordance with the method 
described in Sec. 73.186, or in the absence of such measurements, by 
reference to the propagation curves of Sec. 73.184. The existence or 
absence of objectionable interference due to skywave propagation shall 
be determined by reference to Formula 2 in Sec. 73.190.
    (o) Computation of Skywave Field Strength Values:
    (1) Fifty Percent Skywave Field Strength Values (Clear Channel). In 
computing the fifty percent skywave field strength values of a Class A 
clear channel station, use shall be made of Formula 1 of Sec. 73.190, 
entitled ``Skywave Field Strength'' for 50 percent of the time.
    (2) Ten Percent Skywave Field Strength Values. In computing the 10%

[[Page 51]]

skywave field strength for stations on a single signal or an RSS basis, 
Formula 2 in Sec. 73.190 shall be used.
    (3) Determination of Angles of Departure. In calculating skywave 
field strength for stations on all channels, the pertinent vertical 
angle shall be determined by use of the formula in Sec. 73.190(d).
    (p) The distance to any specified groundwave field strength contour 
for any frequency may be determined from the appropriate curves in 
Sec. 73.184 entitled ``Ground Wave Field Strength vs. Distance.''
    (q) Normally protected service contours and permissible interference 
signals for broadcast stations are as follows (for Class A stations, see 
also paragraph (a) of this section):

----------------------------------------------------------------------------------------------------------------
                                            Signal strength contour of area      Permissible interfering signal
                                              protected from objectionable               (V/m)
  Class of station    Class of channel       interference \1\(V/m)    ---------------------------------
                            used        ---------------------------------------
                                              Day \2\             Night             Day \2\         Night \3\
----------------------------------------------------------------------------------------------------------------
A..................  Clear.............  SC 100            SC 500 50% SW        SC 5             SC 25
                                         AC 500            AC 500 GW            AC 250           AC 250
A (Alaskan)........  ......do..........  SC 100            SC 100 50% SW        SC 5             SC 5
                                         AC 500            AC 500 GW            AC 250           AC 250
B..................  Clear.............  500               2000 \2\             25               25
                     Regional..........  ................  ...................  AC 250           250
C..................  Local.............  500               No presc.\4\         SC25             Not presc.
D..................  Clear.............  500               Not presc            SC 25            Not presc.
                     Regional..........  ................  ...................  AC 250           ...............
----------------------------------------------------------------------------------------------------------------
\1\ When a station is already limited by interference from other stations to a contour of higher value than that
  normally protected for its class, this higher value contour shall be the established protection standard for
  such station. Changes proposed by Class A and B stations shall be required to comply with the following
  restrictions. Those interferers that contribute to another station's RSS using the 50% exclusion method are
  required to either reduce their contributions to that RSS by 10%, or to a level at which their contributions
  no longer enter into the 50% RSS value, whichever is the lesser amount of reduction. Those interferers that
  contribute to a station's RSS using the 25% exclusion method but do not contribute to that station's RSS using
  the 50% exclusion method may make changes not to exceed their present contribution. Interferers not included
  in a station's RSS using the 25% exclusion method are permitted to increase radiation as long as the 25%
  exclusion threshold is not equalled or exceeded. In no case will a reduction be required that would result in
  a contributing value that is below the pertinent value specified in the table. This note does not apply to
  Class C stations; or to the protection of Class A stations which are normally protected on a single signal,
  non-RSS basis.
\2\ Groundwave.
\3\ Skywave field strength for 10 percent or more of the time.
\4\ During nighttime hours, Class C stations in the contiguous 48 States may treat all Class B stations assigned
  to 1230, 1240, 1340, 1400, 1450 and 1490 kHz in Alaska, Hawaii, Puerto Rico and the U.S. Virgin Islands as if
  they were Class C stations.
 
Note: SC=Same channel; AC=Adjacent channel; SW=Skywave; GW=Groundwave

    (r) The following table of logarithmic expressions is to be used as 
required for determining the minimum permissible ratio of the field 
strength of a desired to an undesired signal. This table shall be used 
in conjunction with the protected contours specified in paragraph (q) of 
this section.

----------------------------------------------------------------------------------------------------------------
                                                    Desired Groundwave to:
  Frequency separation of desired to  --------------------------------------------------  Desired 50% Skywave to
       undesired signals (kHz)           Undesired groundwave    Undesired 10% Skywave    Undesired 10% Skywave
                                                 (dB)                     (dB)                     (dB)
----------------------------------------------------------------------------------------------------------------
0....................................                       26                       26                       26
10...................................                        6                        6               not presc.
----------------------------------------------------------------------------------------------------------------

    (s) Two stations, one with a frequency twice of the other, should 
not be assigned in the same groundwave service area unless special 
precautions are taken to avoid interference from the second harmonic of 
the station operating on the lower frequency. Additionally, in selecting 
a frequency, consideration should be given to the fact that occasionally 
the frequency assignment of two stations in the same area may bear such 
a relation to the intermediate frequency of some broadcast receivers as 
to cause ``image'' interference, However, since this can usually be 
rectified by readjustment of the intermediate frequency of such 
receivers, the Commission, in general, will not take this kind of 
interference into consideration when authorizing stations.

[[Page 52]]

    (t) The groundwave service of two stations operating with 
synchronized carriers and broadcasting identical programs will be 
subject to some distortion in areas where the signals from the two 
stations are of comparable strength. For the purpose of estimating 
coverage of such stations, areas in which the signal ratio is between 
1:2 and 2:1 will not be considered as receiving satisfactory service.

    Note: Two stations are considered to be operated synchronously when 
the carriers are maintained within 0.2 Hz of each other and they 
transmit identical program s.


[56 FR 64862, Dec. 12, 1991; 57 FR 43290, Sept. 18, 1992, as amended at 
58 FR 27950, May 12, 1993]



Sec. 73.183  Groundwave signals.

    (a) Interference that may be caused by a proposed assignment or an 
existing assignment during daytime hours should be determined, when 
possible, by measurements on the frequency involved or on another 
frequency over the same terrain and by means for the curves in 
Sec. 73.184 entitled ``Ground Wave Field Strength versus Distance.''

    Note: Groundwave field strength measurements will not be accepted or 
considered for the purpose of establishing that interference to a 
station in a foreign country other than Canada, or that the field 
strength at the border thereof, would be less than indicated by the use 
of the ground conductivity maps and engineering standards contained in 
this part and applicable international agreements. Satisfactory 
groundwave measurements offered for the purpose of demonstrating values 
of conductivity other than those shown by Figure M3 in problems 
involving protection of Canadian stations will be considered only if, 
after review thereof, the appropriate agency of the Canadian government 
notifies the Commission that they are acceptable for such purpose.

    (b)(1) In all cases where measurements taken in accordance with the 
requirements are not available, the groundwave strength must be 
determined by means of the pertinent map of ground conductivity and the 
groundwave curves of field strength versus distance. The conductivity of 
a given terrain may be determined by measurements of any broadcast 
signal traversing the terrain involved. Figure M3 (See Note 1) shows the 
conductivity throughout the United States by general areas of reasonably 
uniform conductivity. When it is clear that only one conductivity value 
is involved, Figure R3 of Sec. 73.190, may be used. It is a replica of 
Figure M3, and is contained in these standards. In all other situations 
Figure M3 must be employed. It is recognized that in areas of limited 
size or over a particular path, the conductivity may vary widely from 
the values given; therefore, these maps are to be used only when 
accurate and acceptable measurements have not been made.
    (2) For determinations of interference and service requiring a 
knowledge of ground conductivities in other countries, the ground 
conductivity maps comprising Appendix 1 to Annex 2 of each of the 
following international agreements may be used:
    (i) For Canada, the U.S.-Canada AM Agreement, 1984;
    (ii) For Mexico, the U.S.-Mexico AM Agreement, 1986; and
    (iii) For other Western Hemisphere countries, the Regional Agreement 
for the Medium Frequency Broadcasting Service in Region 2.
    Where different conductivities appear in the maps of two countries 
on opposite sides of the border, such differences are to be considered 
as real, even if they are not explained by geophysical cleavages.
    (c) Example of determining interference by the graphs in 
Sec. 73.184:

    It is desired to determine whether objectionable interference exists 
between a proposed 5 kW Class B station on 990 kHz and an existing 1 kW 
Class B station on first adjacent channel, 1000 kHz. The distance 
between the two stations is 260 kilometers and both stations operate 
nondirectionally with antenna systems that produce a horizontal 
effective field of 282 in mV/m at one kilometer. (See Sec. 73.185 
regarding use of directional antennas.) The ground conductivity at the 
site of each station and along the intervening terrain is 6 mS/m. The 
protection to Class B stations during daytime is to the 500 V/m 
(0.5 Vm) contour using a 6 dB protection factor. The distance to the 500 
V/m groundwave contour of the 1 kW station is determined by the 
use of the appropriate curve in Sec. 73.184. Since the curve is plotted 
for 100 mV/m at a 1 kilometer, to find the distance of the 0.5 mV/m 
contour of the 1 kw station, it is necessary to determine the distance 
to the 0.1773 m/Vm contour.


[[Page 53]]


(100 x 0.5/282=0.1773)

Using the 6 mS/m curve, the estimated radius of the 0.5 mV/m contour is 
62.5 kilometers. Subtracting this distance from the distance between the 
two stations leaves 197.5 kilometers. Using the same propagation curve, 
the signal from the 5 kW station at this distance is seen to be 0.059 
mV/m. Since a protection ratio of 6 dB, desired to undesired signal, 
applies to stations separated by 10 kHz, the undesired signal could have 
had a value of up to 0.25 mV/m without causing objectionable 
interference. For co-channel studies, adesired to undesired signal ratio 
of no less than 20:1 (26 dB) is required to avoid causing objectionable 
interference.

    (d) Where a signal traverses a path over which different 
conductivities exist, the distance to a particular groundwave field 
strength contour shall be determined by the use of the equivalent 
distance method. Reasonably accurate results may be expected in 
determining field strengths at a distance from the antenna by 
application of the equivalent distance method when the unattenuated 
field of the antenna, the various ground conductivities and the location 
of discontinuities are known. This method considers a wave to be 
propagated across a given conductivity according to the curve for a 
homogeneous earth of that conductivity. When the wave crosses from a 
region of one conductivity into a region of a second conductivity, the 
equivalent distance of the receiving point from the transmitter changes 
abruptly but the field strength does not. From a point just inside the 
second region the transmitter appearsto be at that distance where, on 
the curve for a homogeneous earth of the second conductivity, the field 
strength equals the value that occurred just across the boundary in the 
first region. Thus the equivalent distance from the receiving point to 
the transmitter may be either greater or less than the actual distance. 
An imaginary transmitter is considered to exist at that equivalent 
distance. This technique is not intended to be used as a means 
ofevaluating unattenuated field or ground conductivity by the analysis 
of measured data. The method to be employed for such determinations is 
set out in Sec. 73.186.
    (e) Example of the use of the equivalent distance method;

    It is desired to determine the distance to the 0.5 mV/m and 0.025 
mV/m contours of a station on a frequency of 1000 kHz with an inverse 
distance field of 100 mV/m at one kilometer being radiated over a path 
having a conductivity of 10 mS/m for a distance of 20 kilometers, 5 mS/m 
for the next 30 kilometers and 15 mS/m thereafter. Using the appropriate 
curve in Sec. 73.184, Graph 12, at a distance of 20 kilometers on the 
curve for 10 mS/m, the field strength is found to be 2.84 mV/m. On the 
5mS/m curve, the equivalent distance to this field strength is 14.92 
kilometers, which is 5.08 (20-14.92 kilometers nearer to the 
transmitter. Continuing on the propagation curve, the distance to a 
field strength of 0.5 mV/m is found to be 36.11 kilomteres.
    The actual length of the path travelled, however, is 41.19 
(36.11+5.08) kilometers. Continuing on this propagation curve to the 
conductivity change at 44.92 (50.00-5.08) kilometers, the field strength 
is found to be 0.304 mV/m. On the 15 mS/m propagation curve, the 
equivalent distance to this field strength is 82.94 kilometers, which 
changes the effective path length by 38.02(82.94-44.92) kilometers. 
Continuing on this propagation curve, the distance to a field strength 
of 0.025 mV/m is seen to be 224.4 kilometers. The actual length of the 
path travelled, however, is 191.46 (224.4+5.08-38.02) kilometers.

[28 FR 13574, Dec. 14, 1963, as amended at 44 FR 36037, June 20, 1979; 
48 FR 9011, Mar. 3, 1983; 50 FR 18822, May 2, 1985; 50 FR 24522, June 
11, 1985; 51 FR 9965, Mar. 24, 1986; 54 FR 39736, Sept. 28, 1989; 56 FR 
64866, Dec. 12, 1991; 57 FR 43290, Sept. 18, 1992]



Sec. 73.184  Groundwave field strength graphs.

    (a) Graphs 1 to 20 show, for each of 20 frequencies, the computed 
values of groundwave field strength as a function of groundwave 
conductivity and distance from the source of radiation. The groundwave 
field strength is considered to be that part of the vertical component 
of the electric field which has not been reflected from the ionosphere 
nor from the troposphere. These 20 families of curves are plotted on 
log-log graph paper and each is to be used for the range of frequencies 
shown thereon. Computations are based on a dielectric constant of the 
ground (referred to air as unity) equal to 15 for land and 80 for sea 
water and for the ground conductivities (expressed in mS/m) given on the 
curves. The curves show the variation of the groundwave field strength 
with distance to be expected for transmission from a vertical

[[Page 54]]

antenna at the surface of a uniformly conducting spherical earth with 
the groundwave constants shown on the curves. The curves are for an 
antenna power of such efficiency and current distribution that the 
inverse distance (unattenuated) field is 100 mV/m at 1 kilometer. The 
curves are valid for distances that are large compared to the dimensions 
of the antenna for other than short vertical antennas.
    (b) The inverse distance field (100 mV/m divided by the distance in 
kilometers) corresponds to the groundwave field intensity to be expected 
from an antenna with the same radiation efficiency when it is located 
over a perfectly conducting earth. To determine the value of the 
groundwave field intensity corresponding to a value of inverse distance 
field other than 100 mV/m at 1 kilometer, multiply the field strength as 
given on these graphs by the desired value of inverse distance field at 
1 kilometer divided by 100; for example, to determine the groundwave 
field strength for a station with an inverse distance field of 2700 mV/m 
at 1 kilometer, simply multiply the values given on the charts by 27. 
The value of the inverse distance field to be used for a particular 
antenna depends upon the power input to the antenna, the nature of the 
ground in the neighborhood of the antenna, and the geometry of the 
antenna. For methods of calculating the interrelations between these 
variables and the inverse distance field, see ``The Propagation of Radio 
Waves Over the Surface of the Earth and in the Upper Atmosphere,'' Part 
II, by Mr. K.A. Norton, Proc. I.R.E., Vol. 25, September 1937, pp. 1203-
1237.

    Note: The computed values of field strength versus distance used to 
plot Graphs 1 to 20 are available in tabular form. For information on 
obtaining copies of these tabulations call or write the Consumer Affairs 
Office, Federal Communications Commission, Washington, DC 20554, (202) 
632-7000.

    (c) Provided the value of the dielectric constant is near 15, the 
ground conductivity curves of Graphs 1 to 20 may be compared with actual 
field strength measurement data to determine the appropriate values of 
the ground conductivity and the inverse distance field strength at 1 
kilometer. This is accomplished by plotting the measured field strengths 
on transparent log-log graph paper similar to that used for Graphs 1 to 
20 and superimposing the plotted graph over the Graph corresponding to 
the frequency of the station measured. The plotted graph is then shifted 
vertically until the plotted measurement data is best aligned with one 
of the conductivity curves on the Graph; the intersection of the inverse 
distance line on the Graph with the 1 kilometer abscissa on the plotted 
graph determines the inverse distance field strength at 1 kilometer. For 
other values of dielectric constant, the following procedure may be used 
to determine the dielectric constant of the ground, the ground 
conductivity and the inverse distance field strength at 1 kilometer. 
Graph 21 gives the relative values of groundwave field strength over a 
plane earth as a function of the numerical distance p and phase angle b. 
On graph paper with coordinates similar to those of Graph 21, plot the 
measured values of field strength as ordinates versus the corresponding 
distances from the antenna in kilometers as abscissae. The data should 
be plotted only for distances greater than one wavelength (or, when this 
is greater, five times the vertical height of the antenna in the case of 
a nondirectional antenna or 10 times the spacing between the elements of 
a directional antenna) and for distances less than 
80f\1\/\3\MHz kilometers (i.e., 80 kilometers at 1 MHz). 
Then, using a light box, place the plotted graph over Graph 21 and shift 
the plotted graph vertically and horizontally (making sure that the 
vertical lines on both sheets are parallel) until the best fit with the 
data is obtained with one of the curves on Graph 21. When the two sheets 
are properly lined up, the valueof the field strength corresponding to 
the intersection of the inverse distance line of Graph 21 with the 1 
kilometer abscissa on the data sheet is the inverse distance field 
strength at 1 kilometer, and the values of the numerical distance at 1 
kilometer, p1, and of b are also determined. Knowing the 
values of b and p1 (the numerical distanceat one kilometer), 
we may substitute in the following approximate values of the ground 
conductivity and dielectric constant.

[[Page 55]]

[GRAPHIC] [TIFF OMITTED] TC13NO91.018


(R/)1= Number of wavelengths in 1 kilometer,

                                * * * * *

fMHz=frequency expressed in megahertz,

[GRAPHIC] [TIFF OMITTED] TC13NO91.019


=dielectric constant on the ground referred to air as unity.
    First solve for  by substituting the known values of 
p1, (R/)1, and cos b in equation (1). 
Equation (2) may then be solved for  and equation (3) for 
. At distances greater than 80/f\1\/\3\ MHz 
kilometers the curves of Graph 21 do not give the correct relative 
values of field strength since the curvature of the earth weakens the 
field more rapidly than these plane earth curves would indicate. Thus, 
no attempt should be made to fit experimental data to these curves at 
the larger distances.

    Note: For other values of dielectric constant, use can be made of 
the computer program which was employed by the FCC in generating the 
curves in Graphs 1 to 20. For information on obtaining a printout of 
this program, call or write the Consumer Affairs Office, Federal 
Communications Commission, Washington, DC 200554, (202) 632-7000.

    (d) At sufficiently short distances (less than 55 kilometers at AM 
broadcast frequencies), such that the curvature of the earth does not 
introduce an additional attenuation of the waves, the curves of Graph 21 
may be used to determine the groundwave field strength of transmitting 
and receiving antennas at the surface of the earth for any radiated 
power, frequency, or set of ground constants. First, trace the straight 
inverse distance line corresponding to the power radiated on transparent 
log-log graph paper similar to that of Graph 21, labelling the ordinates 
of the chart in terms of field strength, and the abscissae in terms of 
distance. Next, using the formulas given on Graph 21, calculate the 
value of the numerical distance, p, at 1 kilometer, and the value of b. 
Then superimpose the log-log graph paper over Graph 21, shifting it 
vertically until both inverse distance lines coincide and shifting it 
horizontally until the numerical distance at 1 kilometer on Graph 21 
coincides with 1 kilometer on the log-log graph paper. The curve of 
Graph 21 corresponding to the calculated value of b is then traced on 
the log-log graph paper giving the field strength versus distance in 
kilometers.
    (e) This paragraph consists of the following Graphs 1 to 20 and 21.

    Note: The referenced graphs are not published in the CFR, nor will 
they be included in the Commission's automated rules system. For 
information on obtaining copies of the graphs call or write the Consumer 
Affairs Office, Federal Communications Commission, Washington, DC 20554, 
Telephone: (202) 632-7000.


[28 FR 13574, Dec. 14, 1963, as amended at 50 FR 18823, May 2, 1985; 51 
FR 45891, Dec. 23, 1986; 52 FR 36878, Oct. 1, 1987; 56 FR 64866, Dec. 
12, 1991; 57 FR 43290, Sept. 18, 1992]



Sec. 73.185  Computation of interfering signal.

    (a) Measured values of radiation are not to be used in calculating 
overlap, interference, and coverage.
    (1) In the case of an antenna which is intended to be non-
directional in the horizontal plane, an ideal non-directional radiation 
pattern shall be used in determining interference, overlap, and 
coverage, even if the antenna is not actually non-directional.
    (2) In the case of an antenna which is directional in the horizontal 
plane, the radiation which shall be used in determining interference, 
overlap, and coverage is that calculated pursuant to Sec. 73.150 or 
Sec. 73.152, depending on whether the station has a standard or modified 
standard pattern.
    (3) In the case of calculation of interference or overlap to (not 
from) a foreign station, the notified radiation shall be used, even if 
the notified radiation differs from that in paragraphs (a) (1) or (2) of 
this section.
    (b) For skywave signals from stations operating on all channels, 
interference shall be determined from the appropriate formulas and 
Figure 6a contained in Sec. 73.190.
    (c) The formulas in Sec. 73.190(d) depicted in Figure 6a of 
Sec. 73.190, entitled

[[Page 56]]

``Angles of Departure versus Transmission Range'' are to be used in 
determining the angles in the vertical pattern of the antenna of an 
interfering station to be considered as pertinent to transmission by one 
reflection. To provide for variation in the pertinent vertical angle due 
to variations of ionosphere height and ionosphere scattering, the curves 
2 and 3 indicate the upper and lower angles within which the radiated 
field is to be considered. The maximum value of field strength occurring 
between these angles shall be used to determine the multiplying factor 
to apply to the 10 percent skywave field intensity value determined from 
Formula 2 in Sec. 73.190. The multiplying factor is found by dividing 
the maximum radiation between the pertinent angles by 100 mV/m.
    (d) Example of the use of skywave curves and formulas: Assume a 
proposed new Class B station from which interference may be expected is 
located at a distance of 724 kilometers from a licensed Class B station. 
The proposed station specifies geographic coordinates of 40 deg.00'00"N 
and 100 deg. 00'00"W and the station to be protected is located at an 
azimuth of 45 deg. true at geographic coordinates of 44 deg.26'05"N and 
93 deg.32'54"W. The critical angles of radiation as determined from 
Figure 6a of Sec. 73.190 for use with Class B stations are 9.6 deg. and 
16.6 deg.. If the vertical pattern of the antenna of the proposed 
station in the direction of the existing station is such that, between 
the angles of 9.6 deg. and 16.6 deg. above the horizon the maximum 
radiation is 260 mV/m at one kilometer, the value of the 50% field, as 
derived from Formula 1 of Sec. 73.190, is 0.06217 mV/m at the location 
of the existing station. To obtain the value of the 10% field, the 50% 
valuemust be adjusted by a factor derived from Formula 2 of Sec. 73.190. 
The value in this case is 8.42 dB. Thus, the 10% field is 0.1616 mV/m. 
Using this in conjunction with the co-channel protection ratio of 26 dB, 
the resultant nighttime limit from the proposed station to the licensed 
station is 3.232 mV/m.
    (e) In the case of an antenna which is non-directional in the 
horizontal plane, the vertical distribution of the relative fields 
should be computed pursuant to Sec. 73.160. In the case of an antenna 
which is directional in the horizontal plane, the vertical pattern in 
the great circle direction toward the point of reception in question 
must first be calculated. In cases where the radiation in the vertical 
plane, at the pertinent azimuth, contains a large lobe at a higher angle 
than the pertinent angle for one reflection, the method of calculating 
interference will not be restricted to that just described; each such 
case will be considered on the basis of the best knowledge available.
    (f) In performing calculations to determine permissible radiation 
from stations operating presunrise or postsunset in accordance with 
Sec. 73.99, calculated diurnal factors will be multiplied by the values 
of skywave field strength for such stations obtained from Formula 1 or 2 
of Sec. 73.190.
    (1) The diurnal factor is determined using the time of day at the 
mid-point of path between the site of the interfering station and the 
point at which interference is being calculated. Diurnal factors are 
computed using the formula 
Df=a+bF+cF2+dF3 where:

Df represents the diurnal factor,
F is the frequency in MHz,
a,b,c, and d are constants obtained from the tables in paragraph (k)(2)


A diurnal factor greater than one will not be used in calculations and 
interpolation is to be used between calculated values where necessary. 
For reference purposes, curves for presunrise and postsunset diurnal 
factors are contained in Figures 13 and 14 of Sec. 73.190.
    (2) Constants used in calculating diurnal factors for the presunrise 
and postsunset periods are contained in paragraphs (f)(2) (i) and (ii) 
of this section respectively. The columns labeled Tmp 
represent the number of hours before and after sunrise and sunset at the 
path midpoint.

                        (i) Presunrise Constants

------------------------------------------------------------------------
             Tmp                  a          b          c          d
------------------------------------------------------------------------
-2..........................     1.3084      .0083     -.0155      .0144
-1.75.......................     1.3165     -.4919      .6011     -.1884
-1.5........................     1.0079      .0296      .1488     -.0452
-1.25.......................      .7773      .3751     -.1911      .0736
-1..........................      .6230      .1547      .2654     -.1006
-.75........................      .3718      .1178      .3632     -.1172
-.5.........................      .2151      .0737      .4167     -.1413
-.25........................      .2027     -.2560      .7269     -.2577

[[Page 57]]

 
SR..........................      .1504     -.2325      .5374     -.1729
+.25........................      .1057     -.2092      .4148     -.1239
+5..........................      .0642     -.1295      .2583     -.0699
+.75........................      .0446     -.1002      .1754     -.0405
+1..........................      .0148      .0135      .0462      .0010
------------------------------------------------------------------------

                        (ii) Postsunset Constants

------------------------------------------------------------------------
             Tmp                  a          b          c          d
------------------------------------------------------------------------
1.75........................      .9495     -.0187      .0720     -.0290
1.5.........................      .7196      .3583     -.2280      .0611
1.25........................      .6756      .1518      .0279     -.0163
1.0.........................      .5486      .1401      .0952     -.0288
.75.........................      .3003      .4050     -.0961      .0256
.5..........................      .1186      .4281     -.0799      .0197
.25.........................      .0382      .3706     -.0673      .0171
SS..........................      .0002      .3024     -.0540      .0086
-.25........................      .0278      .0458      .1473     -.0486
-.5.........................      .0203      .0132      .1166     -.0340
-.75........................      .0152     -.0002      .0786     -.0185
-1.0........................     -.0043      .0452     -.0040      .0103
-1.25.......................      .0010      .0135      .0103      .0047
-1.5........................      .0018      .0052      .0069      .0042
-1.75.......................     -.0012      .0122     -.0076      .0076
-2.0........................     -.0024      .0141     -.0141     .0091Q
                                                               P='04'
Sec. 73.186  Establishment of effective field at one kilometer.

    (a) Section 73.189 provides that certain minimum field strengths are 
acceptable in lieu of the required minimum physical heights of the 
antennas proper. Also, in other situations, it may be necessary to 
determine the effective field. The following requirements shall govern 
the taking and submission of data on the field strength produced:
    (1) Beginning as near to the antenna as possible without including 
the induction field and to provide for the fact that a broadcast antenna 
is not a point source of radiation (not less than one wave length or 5 
times the vertical height in the case of a single element, i.e., 
nondirectional antenna or 10 times the spacing between the elements of a 
directional antenna), measurements shall be made on eight or more 
radials, at intervals of approximately 0.2 kilometer up to 3 kilometers 
(1.87 miles) from the antenna, at intervals of approximately 1 kilometer 
from 3 kilometers (1.87 miles) to 10 kilometers (6.2 miles) from the 
antenna, at intervals of approximately 3 kilometers from 10 kilometers 
(6.2 miles) to 25 or 34 kilometers (15.5 miles or 20 miles) from the 
antenna, and a few additional measurements if needed at greater 
distances from the antenna. Where the antenna is rurally located and 
unobstructed measurements can be made, there shall be as many as 18 
measurements on each radial. However, where the antenna is located in a 
city where unobstructed measurements are difficult to make, measurements 
shall be made on each radial at as many unobstructed locations as 
possible, even though the intervals are considerably less than stated 
above, particularly within 3 kilometers of the antenna. In cases where 
it is not possible to obtain accurate measurements at the closer 
distances (even out to 8 or 10 kilometers due to

[[Page 58]]

the character of the intervening terrain), the measurements at greater 
distances should be made at closer intervals. (It is suggested that 
``wave tilt'' measurements may be made to determine and compare 
locations for taking field strength measurements, particularly to 
determine that there are no abrupt changes in ground conductivity or 
that reflected waves are not causing abnormal strengths.
    (2) The data required by paragraph (a)(1) of this section should be 
plotted for each radial in accordance with either of the two methods set 
forth below:
    (i) Using log-log coordinate paper, plot field strengths as ordinate 
and distance as abscissa.
    (ii) Using semi-log coordinate paper, plot field strength times 
distance as ordinate on the log scale and distance as abscissa on the 
linear scale.
    (3) However, regardless of which of the methods in paragraph (a)(2) 
of this section is employed, the proper curve to be drawn through the 
points plotted shall be determined by comparison with the curves in 
Sec. 73.184 as follows: Place the sheet on which the actual points have 
been plotted over the appropriate Graph in Sec. 73.184, hold to the 
light if necessary and adjust until the curve most closely matching the 
points is found. This curve should then be drawn on the sheet on which 
the points were plotted, together with the inverse distance curve 
corresponding to that curve. The field at 1 kilometer for the radial 
concerned shall be the ordinate on the inverse distance curve at 1 
kilometer.
    (4) When all radials have been analyzed in accordance with paragraph 
(a)(3) of this section, a curve shall be plotted on polar coordinate 
paper from the fields obtained, which gives the inverse distance field 
pattern at 1 kilometer. The radius of a circle, the area of which is 
equal to the area bounded by this pattern, is the effective field. (See 
Sec. 73.14.)
    (5) The antenna power of the station shall be maintained at the 
authorized level during all field measurements. The power determination 
will be made using the direct method as described in Sec. 73.51(a) with 
instruments of acceptable accuracy specified in Sec. 73.1215.
    (b) Complete data taken in conjunction with the field strength 
measurements shall be submitted to the Commission in affidavit form 
including the following:
    (1) Tabulation by number of each point of measurement to agree with 
the map required in paragraph (b)(2) of this section, the date and time 
of each measurement, the field strength (E), the distance from the 
antenna (D) and the product of the field strength and distance (ED) (if 
data for each radial are plotted on semilogarithmic paper, see above) 
for each point of measurement.
    (2) Map showing each point of measurement numbered to agree with 
tabulation required above.
    (3) Description of method used to take field strength measurements.
    (4) The family of theoretical curves used in determining the curve 
for each radial properly identified by conductivity and dielectric 
constants.
    (5) The curves drawn for each radial and the field strength pattern.
    (6) The antenna resistance at the operating frequency.
    (7) Antenna current or currents maintained during field strength 
measurements.

[28 FR 13574, Dec. 14, 1963, as amended at 41 FR 44178, Oct. 7, 1976; 46 
FR 11995, Feb. 12, 1981; 49 FR 49851, Dec. 24, 1984; 50 FR 18843, May 2, 
1985; 50 FR 47055, Nov. 14, 1985; 51 FR 2707, Jan. 21, 1986; 52 FR 
10570, Apr. 2, 1987]



Sec. 73.187  Limitation on daytime radiation.

    (a)(1) Except as otherwise provided in paragraphs (a)(2) and (3) of 
this section, no authorization will be granted for a Class B or Class D 
station on a frequency specified in Sec. 73.25 if the proposed operation 
would radiate during the period of critical hours (the two hours after 
local sunrise and the two hours before local sunset) toward any point on 
the 0.1 mV/m contour of a co-channel U.S. Class A station, at or below 
the pertinent vertical angle determined from Curve 2 of Figure 6a of 
Sec. 73.190, values in excess of those obtained as provided in paragraph 
(b) of this section.
    (2) The limitation set forth in paragraph (a)(1) of this section 
shall not apply in the following cases:

[[Page 59]]

    (i) Any Class B or Class D operation authorized before November 30, 
1959; or
    (ii) For Class B and Class D stations authorized before November 30, 
1959, subsequent changes of facilities which do not involve a change in 
frequency, an increase in radiation toward any point on the 0.1 mV/m 
contour of a co-channel U.S. Class A station, or the move of transmitter 
site materially closer to the 0.1 mV/m contour of such Class A station.
    (3) A Class B or Class D station authorized before November 30, 
1959, and subsequently authorized to increase daytime radiation in any 
direction toward the 0.1 mV/m contour of a co-channel U.S. Class A 
station (without a change in frequency or a move of transmitter site 
materially closer to such contour), may not, during the two hours after 
local sunrise or the two hours before local sunset, radiate in such 
directions a value exceeding the higher of:
    (i) The value radiated in such directions with facilities last 
authorized before November 30, 1959, or
    (ii) The limitation specified in paragraph (a)(1) of this section.
    (b) To obtain the maximum permissible radiation for a Class B or 
Class D station on a given frequency from 640 through 990 kHz, multiply 
the radiation value obtained for the given distance and azimuth from the 
500 kHz chart (Figure 9 of Sec. 73.190) by the appropriate interpolation 
factor shown in the K500 column of paragraph (c) of this 
section; and multiply the radiation value obtained for the given 
distance and azimuth from the 1000 kHz chart (Figure 10 of Sec. 73.190) 
by the appropriate interpolation factor shown in the K1000 
column of paragraph (c) of this section. Add the two products thus 
obtained; the result is the maximum radiation value applicable to the 
Class B or Class D station in the pertinent directions. For frequencies 
from 1010 to 1580 kHz, obtain in a similar manner the proper radiation 
values from the 1000 and 1600 kHz charts (Figures 10 and 11 of 
Sec. 73.190), multiply each of these values by the appropriate 
interpolation factors in the K'1000 and K'1600 
columns in paragraph (c) of this section, and add the products.
    (c) Interpolation factors. (1) Frequencies below 1000 kHz.

------------------------------------------------------------------------
                        fkHz                            K500      K1000
------------------------------------------------------------------------
640.................................................     0.720     0.280
650.................................................     0.700     0.300
660.................................................     0.680     0.320
670.................................................     0.660     0.340
680.................................................     0.640     0.360
690.................................................     0.620     0.380
700.................................................     0.600     0.400
710.................................................     0.580     0.420
720.................................................     0.560     0.440
730.................................................     0.540     0.460
740.................................................     0.520     0.480
750.................................................     0.500     0.500
760.................................................     0.480     0.520
770.................................................     0.460     0.540
780.................................................     0.440     0.560
800.................................................     0.400     0.600
810.................................................     0.380     0.620
820.................................................     0.360     0.640
830.................................................     0.340     0.660
840.................................................     0.320     0.680
850.................................................     0.300     0.700
860.................................................     0.280     0.720
870.................................................     0.260     0.740
880.................................................     0.240     0.760
890.................................................     0.220     0.780
900.................................................     0.200     0.800
940.................................................     0.120     0.880
990.................................................     0.020     0.980
------------------------------------------------------------------------

    (2) Frequencies above 1000 kHz.

------------------------------------------------------------------------
                        f'kHz                          K'1000    K'1600
------------------------------------------------------------------------
1010................................................     0.983     0.017
1020................................................     0.967     0.033
1030................................................     0.950     0.050
1040................................................     0.933     0.067
1050................................................     0.917     0.083
1060................................................     0.900     0.100
1070................................................     0.883     0.117
1080................................................     0.867     0.133
1090................................................     0.850     0.150
1100................................................     0.833     0.167
1110................................................     0.817     0.183
1120................................................     0.800     0.200
1130................................................     0.783     0.217
1140................................................     0.767     0.233
1160................................................     0.733     0.267
1170................................................     0.717     0.283
1180................................................     0.700     0.300
1190................................................     0.683     0.317
1200................................................     0.667     0.333
1210................................................     0.650     0.350
1220................................................     0.633     0.367
1500................................................     0.167     0.833
1510................................................     0.150     0.850
1520................................................     0.133     0.867
1530................................................     0.117     0.883
1540................................................     0.100     0.900
1550................................................     0.083     0.917
1560................................................     0.067     0.933
1570................................................     0.050     0.950
1580................................................     0.033     0.967
------------------------------------------------------------------------


[28 FR 13574, Dec. 14, 1963, as amended at 49 FR 43962, Nov. 1, 1984; 56 
FR 64868, Dec. 12, 1991]

[[Page 60]]



Sec. 73.189  Minimum antenna heights or field strength requirements.

    (a) Section 73.45 requires that all applicants for new, additional, 
or different broadcast facilities and all licensees requesting authority 
to move 0the transmitter of an existing station, shall specify a 
radiating system, the efficiency of which complies with the requirements 
of good engineering practice for the class and power of the station.
    (b) The specifications deemed necessary to meet the requirements of 
good engineering practice at the present state of the art are set out in 
detail below.
    (1) The licensee of a AM broadcast station requesting a change in 
power, time of operation, frequency, or transmitter location must also 
request authority to install a new antenna system or to make changes in 
the existing antenna system which will meet the minimum height 
requirements, or submit evidence that the present antenna system meets 
the minimum requirements with respect to field strength, before 
favorable consideration will be given thereto. (See Sec. 73.186.) In the 
event it is proposed to make substantial changes in an existing antenna 
system, the changes shall be such as to meet the minimum height 
requirements or will be permitted subject to the submission of field 
strength measurements showing that it meets the minimum requirements 
with respect to effective field strength.
    (2) These minimum actual physical vertical heights of antennas 
permitted to be installed are shown by curves A, B, and C of Figure 7 of 
Sec. 73.190 as follows:
    (i) Class C stations, and stations in Alaska, Hawaii, Puerto Rico 
and the U.S. Virgin Islands on 1230, 1240, 1340, 1400, 1450 and 1490 kHz 
that were formerly Class C and were redesignated as Class B pursuant to 
Sec. 73.26(b), 45 meters or a minimum effective field strength of 241 
mV/m for 1 kW (121 mV/m for 0.25 kW). (This height applies to a Class C 
station on a local channel only. Curve A shall apply to any Class C 
stations in the 48 conterminous States that are assigned to Regional 
channels.)
    (ii) Class A (Alaska), Class B and Class D stations other than those 
covered in Sec. 73.189(b)(2)(i), a minimum effective field strength of 
282 mV/m for 1 kW.
    (iii) Class A stations, a minimum effective field strength of 362 
mV/m for 1 kW.
    (3) The heights given on the graph for the antenna apply regardless 
of whether the antenna is located on the ground or on a building. Except 
for the reduction of shadows, locating the antenna on a building does 
not necessarily increase the efficiency and where the height of the 
building is in the order of a quarter wave the efficiency may be 
materially reduced.
    (4) At the present development of the art, it is considered that 
where a vertical radiator is employed with its base on the ground, the 
ground system should consist of buried radial wires at least one-fourth 
wave length long. There should be as many of these radials evenly spaced 
as practicable and in no event less than 90. (120 radials of 0.35 to 0.4 
of a wave length in length and spaced 3 deg. is considered an excellent 
ground system and in case of high base voltage, a base screen of 
suitable dimensions should be employed.)
    (5) In case it is contended that the required antenna efficiency can 
be obtained with an antenna of height or ground system less than the 
minimum specified, a complete field strength survey must be supplied to 
the Commission showing that the field strength at a mile without 
absorption fulfills the minimum requirements. (See Sec. 73.186.) This 
field survey must be made by a qualified engineer using equipment of 
acceptable accuracy.
    (6) The main element or elements of a directional antenna system 
shall meet the above minimum requirements with respect to height or 
effective field strength. No directional antenna system will be approved 
which is so designed that the effective field of the array is less than 
the minimum prescribed for the class of station concerned, or in case of 
a Class A station less than 90 percent of the ground wave field which 
would be obtained from a perfect antenna of the height specified by 
Figure 7 of Sec. 73.190 for operation on frequencies below 1000 kHz, and 
in the case of a Class B or Class D station less than 90 percent of the 
ground wave

[[Page 61]]

field which would be obtained from a perfect antenna of the height 
specified by Figure 7 of Sec. 73.190 for operation on frequencies below 
750 kHz.

[28 FR 13574, Dec. 14, 1963, as amended at 31 FR 8069, June 8, 1966; 33 
FR 15420, Oct. 17, 1968; 44 FR 36038, June 20, 1979; 50 FR 18844, May 2, 
1985; 51 FR 2707, Jan. 21, 1986; 51 FR 4753, Feb. 7, 1986; 52 FR 10570, 
Apr. 2, 1987; 56 FR 64868, Dec. 12, 1991]



Sec. 73.190  Engineering charts and related formulas.

    (a) This section consists of the following Figures: 2, r3, 5, 6a, 7, 
8, 9, 10, 11, 12, and 13. Additionally, formulas that are directly 
related to graphs are included.
    (b) Formula 1 is used for calculation of 50% skywave field strength 
values.
    Formula 1. Skywave field strength, 50% of the time (at SS+6):
    The skywave field strength, Fc(50), for a characteristic 
field strength of 100 mV/m at 1 km is given by:
[GRAPHIC] [TIFF OMITTED] TC01MR91.068

    The slant distance, D, is given by:
    [GRAPHIC] [TIFF OMITTED] TC13NO91.020
    

The geomagnetic latitude of the midpoint of the path, 
M, is given by:

M =arcsin[sin aM sin 78.5 deg.

+ cos aM cos 78.5 deg. cos(69 + bM)]

degrees    (Eq. 3)

The short great-circle path distance, d, is given by:
[GRAPHIC] [TIFF OMITTED] TC13NO91.021


Where:

d deg. = arccos[sin aT sin aR

+ cos aT cos aR cos(bR - 
bT)]

degrees    (Eq.5)

Where:
aT is the geographic latitude of the transmitting terminal 
(degrees)
aR is the geographic latitude of the receiving terminal 
(degrees)
bT is the geographic longitude of the transmitting terminal 
(degrees)
bR is the geographic longitude of the receiving terminal 
(degrees)
aM is the geographic latitude of the midpoint of the great-
circle path (degrees) and is given by:
bM is the geographic longitude of the midpoint of the great-
circle path (degrees) and is given by:
[GRAPHIC] [TIFF OMITTED] TC01MR91.069

[GRAPHIC] [TIFF OMITTED] TC01MR91.070

    Note (1): If | FM| is greater than 60 degrees, equation 
(1) is evaluated for | FM| = 60 degrees.
    Note (2): North and east are considered positive; south and west 
negative.

[[Page 62]]

    Note (3): In equation (7), k = -1 for west to east paths (i.e., 
bR > bT), otherwise k = 1.
    (c) Formula 2 is used for calculation of 10% skywave field strength 
values.
    Formula 2. Skywave field strength, 10% of the time (at SS+6):
    The skywave field strength, Fc(10), is given by:

Fc(10) = Fc(50) +     dB(V/m)

Where:
 = 6 when | FM|  40
 = 0.2 | FM| - 2 when 40  | 
FM|  60
 = 10 when | FM| > 60
    (d) Figure 6a depicts angles of departure versus transmission range. 
These angles may also be computed using the following formulas:
[GRAPHIC] [TIFF OMITTED] TC01MR91.071

Where:

d=distance in kilometers
n=1 for 50% field strength values
n=2 or 3 for 10% field strength values
and where
K1=0.00752
K2=0.00938
K3=0.00565

    Note: Computations using these formulas should not be carried beyond 
0.1 degree.

    (e) In the event of disagreement between computed values using the 
formulas shown above and values obtained directly from the figures, the 
computed values will control.

[[Page 63]]

[GRAPHIC] [TIFF OMITTED] TC01MR91.072


[[Page 64]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.073


[[Page 65]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.074


[[Page 66]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.075


[[Page 67]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.076


[[Page 68]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.077


[[Page 69]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.078


[[Page 70]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.079


[[Page 71]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.080


[[Page 72]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.081


[[Page 73]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.082


[[Page 74]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.083


[[Page 75]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.084

[28 FR 13574, Dec. 14, 1963, as amended at 30 FR 12720, Oct. 6, 1965; 33 
FR 15420, Oct 17, 1968; 48 FR 42959, Sept. 20, 1983; 49 FR 43963, Nov. 
1, 1984; 50 FR 18844, May 2, 1985; 51 FR 4753, Feb. 7, 1986; 52 FR 
36879, Oct. 1, 1987; 56 FR 64869, Dec. 12, 1991]



                    Subpart B--FM Broadcast Stations



Sec. 73.201  Numerical designation of FM broadcast channels.

    The FM broadcast band consists of that portion of the radio 
frequency spectrum between 88 MHz and 108 MHz. It is divided into 100 
channels of 200 kHz each. For convenience, the frequencies available for 
FM broadcasting (including those assigned to noncommercial educational 
broadcasting) are given numerical designations which are shown in the 
table below:

------------------------------------------------------------------------
                                                                Channel
                      Frequency (Mc/s)                            No.
------------------------------------------------------------------------
88.1........................................................         201
88.3........................................................         202

[[Page 76]]

 
88.5........................................................         203
88.7........................................................         204
88.9........................................................         205
89.1........................................................         206
89.3........................................................         207
89.5........................................................         208
89.7........................................................         209
89.9........................................................         210
90.1........................................................         211
90.3........................................................         212
90.5........................................................         213
90.7........................................................         214
90.9........................................................         215
91.1........................................................         216
91.3........................................................         217
91.5........................................................         218
91.7........................................................         219
91.9........................................................         220
92.1........................................................         221
92.3........................................................         222
92.5........................................................         223
92.7........................................................         224
92.9........................................................         225
93.1........................................................         226
93.3........................................................         227
93.5........................................................         228
93.7........................................................         229
93.9........................................................         230
94.1........................................................         231
94.3........................................................         232
94.5........................................................         233
94.7........................................................         234
94.9........................................................         235
95.1........................................................         236
95.3........................................................         237
95.5........................................................         238
95.7........................................................         239
95.9........................................................         240
96.1........................................................         241
96.3........................................................         242
96.5........................................................         243
96.7........................................................         244
96.9........................................................         245
97.1........................................................         246
97.3........................................................         247
97.5........................................................         248
97.7........................................................         249
97.9........................................................         250
98.1........................................................         251
98.3........................................................         252
98.5........................................................         253
98.7........................................................         254
98.9........................................................         255
99.1........................................................         256
99.3........................................................         257
99.5........................................................         258
99.7........................................................         259
99.9........................................................         260
100.1.......................................................         261
100.3.......................................................         262
100.5.......................................................         263
100.7.......................................................         264
100.9.......................................................         265
101.1.......................................................         266
101.3.......................................................         267
101.5.......................................................         268
101.7.......................................................         269
101.9.......................................................         270
102.1.......................................................         271
102.3.......................................................         272
102.5.......................................................         273
102.7.......................................................         274
102.9.......................................................         275
103.1.......................................................         276
103.3.......................................................         277
103.5.......................................................         278
103.7.......................................................         279
103.9.......................................................         280
104.1.......................................................         281
104.3.......................................................         282
104.5.......................................................         283
104.7.......................................................         284
104.9.......................................................         285
105.1.......................................................         286
105.3.......................................................         287
105.5.......................................................         288
105.7.......................................................         289
105.9.......................................................         290
106.1.......................................................         291
106.3.......................................................         292
106.5.......................................................         293
106.7.......................................................         294
106.9.......................................................         295
107.1.......................................................         296
107.3.......................................................         297
107.5.......................................................         298
107.7.......................................................         299
107.9.......................................................         300
------------------------------------------------------------------------
Note: The frequency 108.0 MHz may be assigned to VOR test stations
  subject to the condition that interference is not caused to the
  reception of FM broadcasting stations, present or future.


[28 FR 13623, Dec. 14, 1963, as amended at 30 FR 4480, Apr. 7, 1965; 52 
FR 10570, Apr. 2, 1987]



Sec. 73.202  Table of Allotments.

    (a) General. The following Table of Allotments contains the channels 
(other than noncommercial educational Channels 201-220) designated for 
use in communities in the United States, its territories, and 
possessions. All listed channels are for Class B stations in Zones I and 
I-A and for Class C stations in Zone II unless otherwise specifically 
designated.
    (1) Channels designated with an asterisk may be used only by 
noncommercial educational broadcast stations. The rules governing the 
use of those channels are contained in Sec. 73.501.
    (2) Each channel listed in the Table of Allotments reflects the 
class of station that is authorized, or has an application filed, to use 
it based on the minimum and maximum facility requirements for each class 
contained in Sec. 73.211.

    Note: The provisions of this paragraph [(a)(2) of this section] 
become effective [3 years from the effective date of the Report and 
Order in BC Docket 80-90].

    (b) Table of FM Allotments.

[[Page 77]]



                                 Alabama
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abbeville.................................  232C3
Addison...................................  289A
Albertville...............................  286C
Alexander City............................  291C1
Andalusia.................................  251C1, 279A
Anniston..................................  263C
Arab......................................  224A
Ashland...................................  238A
Athens....................................  282C
Atmore....................................  290A
Auburn....................................  249A
Bay Minette...............................  288A
Birmingham................................  229C, 233C, 243C, 258C,
                                             284C, 295C, 299C
Brantley..................................  262A
Brewton...................................  292A
Brundidge.................................  234A
Butler....................................  228C2
Camden....................................  272A
Carrollton................................  231C
Centre....................................  290A
Chickasaw.................................  252C2
Citronelle................................  271C3
Clanton...................................  249A
Columbia..................................  221A
Columbiana................................  268A
Cordova...................................  237A
Cullman...................................  221A, 266C
Dadeville.................................  247A
Daphne....................................  293C2
Decatur...................................  245C, 271C1
Demopolis.................................  293C3
Dora......................................  223A
Dothan....................................  238C, 259C1, 267A, 273C3
Elba......................................  266A
Enterprise................................  245C, 294C
Eufaula...................................  224C2, 250A
Eutaw.....................................  282A
Eva.......................................  260A
Evergreen.................................  227C1
Fairhope..................................  221C3
Fayette...................................  251C1
Florence..................................  241A, 297C
Fort Mitchell.............................  252A
Fort Rucker...............................  263A
Fruithurst................................  274A
Gadsden...................................  279C
Geneva....................................  229C1
Georgiana.................................  299C2
Glencoe...................................  226A
Greensboro................................  256A
Greenville................................  232A, 240A
Grovehill.................................  291C3
Guntersville..............................  240C3
Haleyville................................  224A
Hamilton..................................  221A
Hartselle.................................  291C3
Headland..................................  287C3
Homewood..................................  247A
Huntsville................................  236C2, 256C
Jackson...................................  233C2
Jasper....................................  273C
Linden....................................  275C2, 253C1
Lisman....................................  299A
Luverne...................................  282C1
Meridianville.............................  231A
Millbrook.................................  246A
Mobile....................................  225C, 235C, 241C, 248C, 260C
Monroeville...............................  257C2
Montgomery................................  222C, 241A, 255C1, 255C2,
                                             270C, 277C
Moulton...................................  276A
Muscle Shoals.............................  288A
Northport.................................  264C3
Oneonta...................................  249A
Opelika...................................  244A
Opp.......................................  272A
Orange Beach..............................  289A
Orrville..................................  274A
Oxford....................................  250A
Ozark.....................................  280C3, 285A
Phoenix City..............................  261A
Pine Hill.................................  244C3
Prattville................................  236C2
Reform....................................  269C2
Repton....................................  266A
Roanoke...................................  272C3
Rogersville...............................  230A
Russellville..............................  249A
Saint Florian.............................  274A
Scottsboro................................  252A
Selma.....................................  261C2, 265C2, 287C2
Sheffield.................................  292C3
Smiths....................................  267A
Stevenson.................................  269A
Sylacauga.................................  252A
Talladega.................................  224A, 248A
Tallassee.................................  260A
Thomaston.................................  249A
Thomasville...............................  238C3
Trinity...................................  223A
Troy......................................  289C
Trussville................................  290A
Tuscaloosa................................  225C1, 239C1, 288A
Tuscumbia.................................  262C
Tuskegee..................................  240A
Union Springs.............................  231A
Uniontown.................................  298A
Valley....................................  237A
Vernon....................................  293A
Warrior...................................  254C1, 254C2
Wetumpka..................................  250A
Winfield..................................  290A
York......................................  285C2
------------------------------------------------------------------------


                                 Alaska
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anchorage.................................  225C, 229C2, 247C1, 251C1,
                                             255C1, 263C2, 267C2, 271C3,
                                             276C1, 281C1,287C1, 293C1,
                                             298C1
Bethel....................................  252C3, 261C3
College...................................  280C3
Cordova...................................  265A
Delta Junction............................  228A
Dillingham................................  256A
Fairbanks.................................  240C3, 245C3, 251C1, 266C2,
                                             273C, 284C3
Haines....................................  *272A
Homer.....................................  278C
Houston...................................  221A, 234C2, 241A, 242A
Juneau....................................  264A, 274A, 282A, 286A,
                                             292C3
Kasilof...................................  295A
Kenai.....................................  261C3
Ketchikan.................................  260A, 290C3, 294A
King Salmon...............................  221A
Kodiak....................................  261A, 266A
Kotzebue..................................  280A
Naknek....................................  265A
Nikiski...................................  227C2
Nome......................................  241A, 262A

[[Page 78]]

 
North Pole................................  262C1
Palmer....................................  238C1
Petersburg................................  *265A
Seward....................................  290A
Sitka.....................................  276C2, 284A
Soldotna..................................  243C3, 269C3
Sterling..................................  ............................
Valdez....................................  227A
Wasilla...................................  259C1, 265C2
Wrangell..................................  *269A
Yakutat...................................  280A
------------------------------------------------------------------------


                                 Arizona
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ajo.......................................  252A
Apache junction...........................  296C2
Arizona City..............................  293A
Bagdad....................................  276C3
Benson....................................  249A
Bisbee....................................  222A
Buckeye...................................  295A
Bullhead City.............................  274C
Casa Grande...............................  288C2
Chandler..................................  300C
Chinle....................................  297C2
Chino Valley..............................  280C3
Claypool..................................  291A
Clifton...................................  271C1
Colorado City.............................  296C3
Comobabi..................................  *275A
Cottonwood................................  240C1, 289C3
Douglas...................................  237A, 243A
Duncan....................................  264A
Eager.....................................  223C1
Flagstaff.................................  225C, 230C, 248C, 261C2,
                                             279C3
Florence..................................  276C1
Gilbert...................................  280C2
Glendale..................................  222C, 278C
Globe.....................................  247C3, 262C
Green Valley..............................  221C2, 246C3
Holbrook..................................  221C1
Kachina Village...........................  286C2
Kearny....................................  287C2
Kingman...................................  234C, 261C2, 290C1
Lake Havasu City..........................  224C2, 244C2, 266C3, 283C2,
                                             286C2
Leupp.....................................  255C
Marana....................................  252A
Mesa......................................  284C, 227C
Miami.....................................  252A
Munds Park................................  291A
Nogales...................................  252A, 256A
Oracle....................................  292A
Oro Valley................................  248A, 270A
Page......................................  227C2
Paradise Valley...........................  290C2
Parker....................................  230C3, 257C2
Payson....................................  257A, 266C1, 282C
Phoenix...................................  233C, 238C, 245C, 254C,
                                             260C, 268C, 273C
Pima......................................  296A
Pinetop...................................  294C1
Prescott..................................  256C, 271C
Prescott Valley...........................  252C2, 294C2
Quartzsite................................  232A
Safford...................................  231C1
Salome....................................  241A
Seligman..................................  277A
St. Johns.................................  239C
Strasburg.................................  272A
Scottsdale................................  264C
Sedona....................................  275C, 298C
Show Low..................................  228C2, 243C
Sierra Vista..............................  265A, 269A
Somerton..................................  260C3
Springerville.............................  269C1
Sun City..................................  292C2
Tempe.....................................  250C
Thatcher..................................  256C
Tuba City.................................  250C1
Tucson....................................  225C, 229C, 235C, 241C,
                                             258C, 281A, 298C
Tusayan...................................  221A
Wellton...................................  283C2, 240A
Wickenburg................................  231C3, 287C2
Willcox...................................  223C3, 285C2
Williams..................................  244A
Window Rock...............................  241C1, 274C3
Winslow...................................  236C
Yarnell...................................  258A
Yuma......................................  226C, 236C, 265A
------------------------------------------------------------------------


    Effective Date Notes: 1. At 64 FR 47405, 47407-47408, Aug. 31, 1999, 
Arizona was amended by removing Oraibi, channel 255C, and adding Leupp, 
channel 255C; by adding Somerton, channel 260C3 and channel 240A at 
Wellton, effective Oct. 4, 1999.
    2. At 64 FR 50009, Sept. 15, 1999, Arizona was amended by adding 
channel 279C3 at Flagstaff, effective Oct. 18, 1999.

                                Arkansas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Arkadelphia...............................  265A
Ashdown...................................  227C3, 280A
Atkins....................................  257A
Augusta...................................  249C2
Bald Knob.................................  296C3
Barling...................................  233A
Batesville................................  226C, 258A
Beebe.....................................  268A
Bella Vista...............................  293C2
Benton....................................  294C2
Bentonville...............................  239A, 252C1
Berryville................................  296C3
Blossom...................................  224C2
Blytheville...............................  242C1
Booneville................................  284C2
Bryant....................................  227A
Cabot.....................................  273A
Calico Rock...............................  246A
Camden....................................  246C2, 283A
Cherokee Village..........................  252A
Clarendon.................................  281A
Clarksville...............................  224A, 295A
Clinton...................................  221C3
Coalgate..................................  288C2
Colt......................................  272C2
Conway....................................  224A, 286C1
Corning...................................  228A
Cotton Plant..............................  257A
Crossett..................................  285A
Danville..................................  288A
Dardanelle................................  272C3
De Witt...................................  247C2
DeQueen...................................  221C2

[[Page 79]]

 
Dermott...................................  276A, 289A
Des Arc...................................  284A
Dumas.....................................  295C3
Earle.....................................  280C3
East Camden...............................  237C1
El Dorado.................................  227C3, 240A, 254C3, 268A,
                                             277C1
England...................................  243C3
Eudora....................................  268A
Eureka Springs............................  265A
Fairfield Bay.............................  291C2
Fayetteville..............................  221C3, 280C1, 300C
Fordyce...................................  272A
Forrest City..............................  228C3
Fort Smith................................  229C, 256C, 260C, 264C2
Glenwood..................................  283A
Gosnell...................................  297A
Gould.....................................  273A
Greenwood.................................  268A, 292C3
Grosnell..................................  230A
Gurdon....................................  295C3
Hamburg...................................  258A
Hampton...................................  293C3
Hardy.....................................  284A
Harrisburg................................  240C3
Harrison..................................  244A, 241C2, 275C1
Hatfield..................................  281C2
Heber Springs.............................  264C2
Helena....................................  233C3, 276C3
Hope......................................  269C2, 285A
Horseshoe Bend............................  293A
Hot Springs...............................  244A, 248C1, 290C1
Hot Springs Village.......................  225A
Hoxie.....................................  287A
Humnoke...................................  269A
Huntsville................................  258C3
Jacksonville..............................  262C1
Jonesboro.................................  263C2, 270C, 300C1
Judsonia..................................  237A
Kensett...................................  289A
Lakeview..................................  228C3
Lake City.................................  285C3
Lake Village..............................  240A, 278C3
Little Rock...............................  231C, 239C, 253C, 258A, 279C
Lonoke....................................  292C2
Lowell....................................  270C2
Magnolia..................................  300C1
Malvern...................................  268A
Mammoth Spring............................  236C1
Marianna..................................  287A
Marion....................................  296A
Marked Tree...............................  229A
Marshall..................................  282C
Maumelle..................................  235C, 245A
Mena......................................  242C1, 271C3, 287C3
Monticello................................  229C3, 260C3
Morrilton.................................  269A
Mountain Home.............................  250C2, 288C2, 298C1
Mountain Pine.............................  270A
Mountain View.............................  277C
Murfreesboro..............................  258C3
Nashville.................................  245A, 288A
Newport...................................  244C2
North Crossett............................  274C3
North Little Rock.........................  266A
Ola.......................................  267A
Ozark.....................................  244A
Pangburn..................................  256A
Paragould.................................  296A
Paris.....................................  237C2
Piggott...................................  288A
Pine Bluff................................  222C1, 257A, 267C3
Pocohontas................................  281A
Prairie Grove.............................  235C2
Rogers....................................  232C2
Russellville..............................  265A
Saint Paul................................  287A
Salem.....................................  265A
Searcy....................................  260C2
Sheridan..................................  275C2
Sherwood..................................  271A
Siloam Springs............................  *266A, 289C
Springdale................................  285A
Stamps....................................  263C2, 282A
Stuttgart.................................  288A
Texarkana.................................  284A, 292C2, 296A
Trumann...................................  294A
Turrell...................................  234A
Van Buren.................................  274C2
Viola.....................................  232C3
Waldo.....................................  256A
Waldron...................................  276C2
Walnut Ridge..............................  292A
Warren....................................  288A
West Helena...............................  233C3, 285A
White Hall................................  283A
Wrightsville..............................  299C2
Wynne.....................................  223C2
Yellville.................................  269A
------------------------------------------------------------------------


    Effective Date Notes: 1. At 64 FR 47405, 47407, Aug. 31, 1999, 
Arkansas was amended by adding Cotton Plant, channel 257A and Kensett, 
channel 289A, effective Oct. 4, 1999.
    2. At 64 FR 49683, Sept. 14, 1999, Arkansas was amended by adding 
Judsonia, channel 237A, effective Oct. 12, 1999.

                               California
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alameda...................................  224A
Alturas...................................  267C, 293C1, 297C
Anaheim...................................  240A
Anderson..................................  234C2
Apple Valley..............................  272A
Arcadia...................................  296A
Arcata....................................  226C
Arnold....................................  240A, 291B1
Arvin.....................................  223A
Atascadero................................  283B
Atwater...................................  223A
Auberry...................................  286B1
Auburn....................................  266B
Avalon....................................  224A
Avenal....................................  289A
Baker.....................................  235B1, 268B
Bakersfield...............................  221A, 231B, 243B, 257B1,
                                             268B, 296A, 300B
Barstow...................................  232B1, 240B1
Beaumont..................................  265A
Berkeley..................................  231B, 275B
Big Bear City.............................  227A
Big Bear Lake.............................  269A
Big Pine..................................  227B
Bishop....................................  264B
Blue Lake.................................  292A
Blythe....................................  262B
Booneville................................  241A
Brawley...................................  233B, 241B
Burney....................................  291C
Calexico..................................  249A

[[Page 80]]

 
California City...........................  295A
Calipatria................................  265A
Calistoga.................................  265A
Camarillo.................................  212B, 240B1
Cambria...................................  235B1, 278A
Carlsbad..................................  239B
Carmel....................................  238A, 269A
Carmel Valley.............................  290A
Carnelian Bay.............................  279C1
Carpinteria...............................  269A
Cartago...................................  275A
Cathedral City............................  253B
Central Valley............................  257C2
Chester...................................  255C, 259A
Chico.....................................  230B1, 236B, 224A
China Lake................................  274A
Chowchilla................................  227A
Clovis....................................  221B
Coachella.................................  229B
Coalinga..................................  247A, 261B
Coarsegold................................  233A
Columbia..................................  255A
Colusa....................................  276A, 298B
Compton...................................  272A
Copperopolis..............................  288A
Corcoran..................................  272B1
Corning...................................  264C1
Cresent City..............................  232C3
Cresent North.............................  250C2
Davis.....................................  282A
Delano....................................  253B, 287B
Desert Center.............................  288A
Dinuba....................................  255B
Dunnigan..................................  288B1
Dunsmuir..................................  261C3
Earlimart.................................  228A
East Hemet................................
East Los Angeles..........................  250B
East Porterville..........................  263B1
El Cajon..................................  227B
El Centro.................................  298B
El Rio....................................  279A
Ellwood...................................  233B
Escondido.................................  221A
Esparto...................................  250A
Essex.....................................  255B, 280B
Eureka....................................  222C1, 242C, 268C, 288C1
Fair Oaks.................................  234B1
Fallbrook.................................  296A
Farmington................................  232A
Felton....................................  229A
Ferndale..................................  257A
Firebaugh.................................  234A
Ford City.................................  271A
Fort Bragg................................  228B, 237B1, 253B1
Fortuna...................................  262C1
Fowler....................................  244B1
Freedom...................................  298A
Fremont...................................  285A
Fresno....................................  229B, 239B, 250B, 257A,
                                             266B, 270B, 274B, 290B
Garberville...............................  279C1, 284C
Garden Grove..............................  232A
George....................................  264A
Gilroy....................................  233B
Glendale..................................  270B
Goleta....................................  292A
Gonzales..................................  282A
Grass Valley..............................  232B1, 257A, 277A
Greenacres................................  291B1
Greenfield................................  258B, 300B
Gridley...................................  268A
Grover Beach..............................  297B
Guadalupe.................................  288A
Gualala...................................  263b1
Hamilton City.............................  269A
Hanford...................................  233A, 279B, 298B
Healdsburg................................  225B, 240A, 244A
Hollister.................................  228A
Holtville.................................  261A
Huron.....................................  252A
Hydesville................................  231C1
Idyllwild.................................  267A
Imperial..................................  257A
Independence..............................  223B
Indio.....................................  224A, 272A
Inglewood.................................  280A
Jackson...................................  259A
Johannesburg..............................  280B1
Joshua Tree...............................  221A
Julian....................................  261A
Kerman....................................  232A, 237A
Kernville.................................  273A
King City.................................  230B1, 271B
Kings Beach...............................  299C3
Kingsburg.................................  292A
La Quinta.................................  244A
Lake Arrowhead............................  280A
Lake Isabella.............................  283A
Lakeport..................................  252A, 258B
Lancaster.................................  292A
Lenwood...................................  245A, 283A
Lindsay...................................  277B1
Livermore.................................  269A
Livingston................................  240A
Lodi......................................  249A
Lompoc....................................  262B1, 281B1, 285A, 294B1
Long Beach................................  288A
Los Altos.................................  249A
Los Angeles...............................  222B, 226B, 230B, 234B,
                                             238B, 242B, 246B, 254B,
                                             258B, 262B, 266B, 274B,
                                             278B, 282B, 286B, 290B,
                                             298B
Los Banos.................................  284B, 295A
Los Gatos.................................  237A
Los Molinos...............................  269A
Los Osos-Baywood Pk.......................  267B
Lost Hills................................  289A
Lucerne Valley............................  293A
Ludlow....................................  261B1, 289A
Madera....................................  296B1
Mammoth Lakes.............................  293B1
Manteca...................................  244A
Maricopa..................................  235A
Marina....................................  224B1
Mariposa..................................  242B, 280A
Marysville................................  260B
McCloud...................................  238C3
McFarland.................................  247A, 275B1
Mecca.....................................  249A
Mendocino.................................  224A
Mendota...................................  263A
Merced....................................  231A, 248B, 292A, 299A
Middletown................................  254A
Modesto...................................  230A, 272A, 277B, 281B
Mojave....................................  249A
Monte Rio.................................  249B1
Montecito.................................  225A
Monterey..................................  245B
Morro Bay.................................  231A, 259A
Morgan Hill...............................  241A
Mount Bullion.............................  260B
Mount Shasta..............................  300A

[[Page 81]]

 
Mountain Pass.............................  259B
Needles...................................  250C1, 296B
Newberry Springs..........................  279A
Newport Beach.............................  276A
Oakdale...................................  236B
Oakhurst..................................  276B1
Oceanside.................................  271B
Oildale...................................  237B1
OJAI......................................  288A
Ontario...................................  228A
Orange Cove...............................  262A
Orcutt....................................  239B1
Orland....................................  294B
Oroville..................................  249B1
Oxnard....................................  252B1, 275A, 284B
Pacific Grove.............................  286B1
Palm Dessert..............................  276A
Palm Springs..............................  263B1, 284B, 291B
Paradise..................................  244B1, 278B1
Pasadena..................................  294B
Paso Robles...............................  223B, 276A
Patterson.................................  226B, 246A
Pismo Beach...............................  237A
Placerville...............................  221A
Point Arena...............................  272B1, 296B1
Porterville...............................  259B
Quincy....................................  240A, 262A
Rancho Mirage.............................  258A
Red Bluff.................................  239B, 274C2
Redding...................................  247C, 251C, 282C
Redlands..................................  244A
Redondo Beach.............................  228A
Ridgecrest................................  224B1, 285B1
Rio Del...................................  297C2
Riverside.................................  224A, 248B, 256B
Rohnert Park..............................  285A
Rosamond..................................  228A, 288A
Roseville.................................  229B1
Sacramento................................  223B, 241B, 245B, 253B,
                                             263B, 278A, 286B, 293B,
                                             300B
Salinas...................................  250A, 264B, 273B, 278A
San Bernardino............................  236B, 260B
San Clemente..............................  300B
San Diego.................................  231B, 235B, 243B, 247B,
                                             251B, 264B, 268B, 275B,
                                             279B, 287B, 293B
San Fernando..............................  232A
San Francisco.............................  227B, 235B, 239B, 243B,
                                             247B, 251B, 255B, 259B,
                                             267B, 271B, 279B, 283B,
                                             287B, 291B, 295B
San Jacinto...............................  241A
San Joaquin...............................  288A
San Jose..................................  222B, 253B, 262B, 293B
San Luis Obispo...........................  227B, 241B, 246B1, 251B
San Mateo.................................  299B
San Rafael................................  264A
Santa Ana.................................  244A, 292A
Santa Barbara.............................  229B, 248B, 260B, 277B,
                                             299B1
Santa Clara...............................  289B
Santa Cruz................................  256B
Santa Margarita...........................  291B1
Santa Maria...............................  256B, 273B
Santa Paula...............................  244A
Santa Rosa................................  261B1, 269A
Santa Ynez................................  290A
Searcy....................................  260C2
Seaside...................................  280A, 296A
Sebastopol................................  229A
Shafter...................................  249A, 282A
Shasta Lake City..........................  257C3, 296C3
Shingle Springs...........................  270B
Shingletown...............................  241A, 287C2
Soledad...................................  292A
Solvang...................................  244A
Sonora....................................  224A
South Lake Tahoe..........................  230B1, 275C
South Oroville............................  285A
St. Helena................................  257A
Stockton..................................  257A, 261A, 297B
Sun City..................................  225A
Susanville................................  222C2, 227C, 242C3
Sutter Creek..............................  298A
Taft......................................  280A, 293A
Tahoe City................................  243C1
Tecopa....................................  291A
Tehachapi.................................  261A, 276A
Temecula..................................  233A, 277A
Templeton.................................  263A
Thousand Oaks.............................  216B, 224A, 234A
Tipton....................................  285A
Tracy.....................................  265A
Truckee...................................  268A
Tulare....................................  235B, 294B
Tulelake..................................  243C
Turlock...................................  252A
Twin Harte................................  228A
Twentynine Palms..........................  242A, 299B1
Ukiah.....................................  233B, 246A, 277B, 290B
Vacaville.................................  237B1
Ventura...................................  236B, 264B, 296A
Victorville...............................  276A
Visalia...................................  255B, 241A, 246B
Walnut Creek..............................  221A
Weaverville...............................  266A, 276C2
Weed......................................  272C1
Westley...................................  238A
West Covina...............................  252A
Williams..................................  256A
Willows...................................  292A
Windon....................................  254A
Windsor...................................  281A
Woodlake..................................  281B
Woodland..................................  281B
Yermo.....................................  251B
Yreka.....................................  280C1
Yuba City.................................  280B1
Yucca Valley..............................  295B
------------------------------------------------------------------------


    Effective Date Notes: 1. At 64 FR 47406, Aug. 31, 1999, California 
was amended by adding channel 293A at Taft, effective Oct. 4, 1999.
    2. At 64 FR 49089, California was amended by adding Carmel Valley, 
channel 290A, effective Oct. 12, 1999.
    3. At 64 FR 50256-57, California was amended by adding Maricopa, 
channel 235A, Lost Hills, channel 289A, and Hamilton City, 269A, 
effective Oct. 18, 1999.

                                Colorado
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alamosa...................................  228A
Aspen.....................................  249C3, 296C3
Avon......................................  276C2
Basalt....................................  291A
Boulder...................................  247C
Buena Vista...............................  281C3
Breckenridge..............................  272A
Brush.....................................  292A, 296A

[[Page 82]]

 
Burlington................................  257C1, 281C1
Calhan....................................  284A
Canon City................................  283A
Carbondale................................  244A
Castle Rock...............................  221C2
Center....................................  287A
Colorado Springs..........................  225C, 232C, 236C, 251C, 270C
Cortez....................................  250C, 254C
Craig.....................................  229C1, 273C
Del Norte.................................  242A
Delta.....................................  236C, 277C2
Denver....................................  239C, 253C, 258C, 262C,
                                             266C, 278C, 286C, 290C,
                                             294C
Dinosaur..................................  247C1
Dolores...................................  227C2
Dove Creek................................  273C3
Durango...................................  259C2, 263C1, 267C1, 287A
Eagle.....................................  268C
Eckley....................................  237C1
El Jebel..................................  263A
Estes Park................................  271C3
Evergreen.................................  243C
Fort Collins..............................  227C, 300C1
Fort Morgan...............................  269A
Fountain..................................  241C3
Frisco....................................  230A
Fruita....................................  260C
Glenwood Springs..........................  224C, 238A, 256C3
Grand Junction............................  222C, 226C, 264C1, 282C,
                                             300C
Greeley...................................  223C1, 241C1
Gunnison..................................  252C3, 272A
Hayden....................................  240C3, 297A
Holyoke...................................  222C2
Idalia....................................  231A
Julesburg.................................  243C1
Kremmling.................................  292C3
La Jara...................................  246A
La Junta..................................  221C3, 293C1,
La Veta...................................  277A
Lafayette.................................  234C
Lakewood..................................  298C
Lamar.....................................  227C1, 289C1
Las Animas................................  297A
Leadville.................................  228A
Limon.....................................  229A, 276C1
Longmont..................................  282C1
Loveland..................................  273C2
Manitou Springs...........................  274C
Meeker....................................  251C
Monte Vista...............................  237A
Montrose..................................  231C, 241C
New Castle................................  233A
Oak Creek.................................  281C3
Otis......................................  252C1
Ouray.....................................  289C
Pagosa Springs............................  292C3
Palisade..................................  253C3
Poncha Springs............................  248A
Pueblo....................................  245C, 255C, 260C, 264C,
                                             296C2, 300C1
Pueblo West...............................  280C2
Rifle.....................................  287C
Rocky Ford................................  238C1
Rye.......................................  285A
Salida....................................  222C3, 229C3
Security..................................  288C3
Silverton.................................  279C2, 297C1
Snowmass Village..........................  280A
Strasburg.................................  *249C3, 272A
Steamboat Springs.........................  245C2, 255A
Sterling..................................  284C1, 288A
Telluride.................................  285C3
Trinidad..................................  223C1
Vail......................................  284C1
Walden....................................  231C2
Walsenburg................................  272C3, 267C3
Wellington................................  232C3
Westcliffe................................  276A
Widefield.................................  292C2
Windsor...................................  256C
Yuma......................................  233A, 265C3
------------------------------------------------------------------------


    Effective Date Notes: 1. At 64 FR 47406-47409, Aug. 31, 1999, 
Colorado was amended by adding channel 267C3 at Walsenburg and La Veta, 
channel 277A and Center, channel 287A, effective Oct. 4, 1999.
    2. At 64 FR 49087-49089, Sept. 10, 1999, Colorado was amended by 
adding Del Norte, channel 242A, Dinosaur, channel 247C1, Poncha Springs, 
channel 248A, La Jara, channel 246A, and Westcliffe, channel 276A, 
effective Oct. 12, 1999.
    3. At 64 FR 50010, Sept. 15, 1999, Colorado was amended by adding 
Dove Creek, channel 273C3, effective Oct. 18, 1999.

                               Connecticut
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Bridgeport................................  260B
Brookfield................................  236B
Danbury...................................  252A
East Lyme.................................  254A
Enfield...................................  250A
Groton....................................  288A
Hamden....................................  267B
Hartford..................................  229B, 243B, 275B, 290B, 295B
Hartford-Meriden..........................  239B
Ledyard...................................  293A
Litchfield................................  247A
Middletown................................  285A
New Britain...............................  263B
New Haven.................................  232A, 256B
New London................................  265A
Norwalk...................................  240A
Norwich...................................  249A
Pawcatuck.................................  299A
Salisbury.................................  251A
Sharon....................................  277A
Stamford..................................  244A
Stonington................................  272A
Waterbury.................................  223B, 281B
Westport..................................  300B
Willimantic...............................  252A
------------------------------------------------------------------------


                                Delaware
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Bethany Beach.............................  240B1, 278A
Dover.....................................  234B
Fenwick Island............................  221A
Laurel....................................  237A
Lewes.....................................  290A
Milford...................................  249A, 267A
Millsboro.................................  228B
Ocean View................................  269A
Rehoboth Beach............................  224A

[[Page 83]]

 
Seaford...................................  253A
Selbyville................................  250A
Smyrna....................................  225A
Wilmington................................  229B, 258B
------------------------------------------------------------------------


                          District of Columbia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Washington................................  230B, 242B, 246B, 254B,
                                             258B, 262B, 266B, 278B,
                                             297B
------------------------------------------------------------------------


                                 Florida
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alachua...................................  223A
Apalachicola..............................  263C3, 288C2
Apopka....................................  237A
Atlantic Beach............................  283C
Avon Park.................................  256C3
Baldwin...................................  289A
Belle Glade...............................  228A
Beverly Hills.............................  292C3
Big Pine Key..............................  281C1
Blountstown...............................  272A
Boca Raton................................  260C
Bonifay...................................  249C1
Bonita Springs............................  241C
Bradenton.................................  278C
Callahan..................................  227C2
Callaway..................................  278C1
Cape Coral................................  280C, 292A
Carrabelle................................  293C1
Cedar Key.................................  274C3
Century...................................  286C3
Charlotte Harbor..........................  225C1
Chiefland.................................  300A
Clearwater................................  239C1, 250C
Clewiston.................................  258C3
Cocoa.....................................  257C2
Cocoa Beach...............................  266C, 281C
Coral Cove................................  300C2
Coral Gables..............................  286C
Crawfordville.............................  231A
Crestview.................................  284C1
Cross City................................  295C1
Crystal City..............................  253C1
Dade City.................................  241A
Daytona Beach.............................  233C, 270C1
Defuniak Springs..........................  276C2
Deland....................................  290C
Destin....................................  221C3
Dunnellon.................................  272C2
Edgewater.................................  226C3
Englewood.................................  290A
Fernandina Beach..........................  287A
Five Points...............................  293A
Fort Lauderdale...........................  264C, 278C, 290C, 294C
Fort Mead.................................  252C2
Fort Myers................................  237C1, 245C, 270C
Fort Myers Beach..........................  257C2
Fort Myers Villas.........................  292C2
Fort Pierce...............................  238C1, 254C
Fort Walton Beach.........................  243C1, 258C2
Gainesville...............................  265A, 279C1, 287A
Gifford...................................  234A
Goulds....................................  252C
Graceville................................  269A
Green Cove Springs........................  224A
Gretna....................................  227A
Gulf Breeze...............................  291A
Havana....................................  285C2
Hialeah...................................  222C2
High Springs..............................  285A
Hobe Sound................................  288C2
Holiday...................................  246C2
Holly Hill................................  277A
Holmes Beach..............................  254C3
Horseshoe Beach...........................  234C3
Homosassa Springs.........................  237A
Immokalee.................................  221A
Indian River Shores.......................  246C3
Indiantown................................  276C2
Inglis....................................  282A
Jacksonville..............................  236C, 241C, 245C, 256C,
                                             275C, 297C1
Jensen Beach..............................  272C1
Jupiter...................................  292C3
Key Colony Beach..........................  267C2
Key Largo.................................  292C2
Key West..................................  223C1, 228C2, 254C1, 258C1,
                                             296A, 300C1
LaBelle...................................  223A
LaCrosse..................................  258A
Lafayette.................................  260C2
LaCrosse..................................  258A
Lake City.................................  232C2
Lakeland..................................  231C
Lehigh Acres..............................  296C2
Live Oak..................................  251C2, 291A
MacClenny.................................  221C3
Madison...................................  274A
Marathon..................................  232C2, 249C1, 288C2
Marco.....................................  255A, 266C1
Marianna..................................  231A, 265A
Mary Esther...............................  288C3
Melbourne.................................  236A, 292C3, 296C1
Mexico Beach..............................  25C2
Miami.....................................  226C, 243C 247C, 256C1,
                                             268C1, 298C
Miami Beach...............................  230C, 235C
Micanopy..................................  247C2
Midway....................................  264C3
Milton....................................  274C
Miramar Beach.............................  292A
Monticello................................  289C3
Mount Dora................................  299C
Murdock...................................  255A
Naples....................................  228A, 233C, 284C2
Naples Park...............................  288C2
Navarre...................................  239C3
Newberry..................................  263C3
New Port Richey...........................  288C1
Niceville.................................  262A
Nocatee...................................  287A
North Miami Beach.........................  239C2
Ocala.....................................  224A, 229C
Orlando...................................  222C, 243C, 255C2, 262C,
                                             286C
Ormond-By-The-Sea.........................  239C3
Othello...................................  248C2
Otter Creek...............................  240A
Palatka...................................  260C
Palm Beach................................  250C
Panama City...............................  223C1, 253C, 290C2, 300C1
Panama City Beach.........................  261C3, 286C2
Parker....................................  233C
Pensacola.................................  231C, 254C2, 264C, 268C,
                                             297C
Perry.....................................  221A, 228A, 299C3
Plantation Key............................  262C1, 276C3
Pompano Beach.............................  274C
Ponte Vedra Beach.........................  227A

[[Page 84]]

 
Port Charlotte............................  261C1
Port St. Joe..............................  228C2
Port St. Lucie............................  267A
Punta Rassa...............................  249C3
Quincy....................................  268C1
Riviera Beach.............................  232C3
Rock Harbor...............................  271C2
Rockledge.................................  274C2
Safety Harbor.............................  223C2
San Carlos Park...........................  253C3
Santa Rosa Beach..........................  271C3
Sarasota..................................  273C, 282A, 293C2
Satellite Beach...........................  253A
Sebastian.................................  240C3
Sebring...................................  289C3
Silver Springs............................  238A
Solana....................................  285A
Springfield...............................  240C2, 266A
St. Augustine.............................  231C3, 250C2
St. Augustine Beach.......................  288C3
St. Petersburg............................  258C, 268C1, 297C1
Starke....................................  292A
Stuart....................................  224C2
Summerland Key............................  273C2
Tallahassee...............................  235C1, 241C2, 255C1, 276C2,
                                             281C, 291A
Tampa.....................................  227C, 235C, 264C, 284C1
Tavares...................................  294C1
Tavernier.................................  245C3
Tice......................................  275C2
Titusville................................  251C1
Trenton...................................  269C3
Venice....................................  221C3
Vero Beach................................  229C2, 259C2, 269A, 279C2
Watertown.................................  271C3, 289A
West Palm Beach...........................  221C3, 282C, 300C1
White City................................  284A
Williston.................................  267A
Wilson Creek..............................  277C3
Winter Haven..............................  248C
Winter Park...............................  276C3
Woodville.................................  250A
Yankeetown................................  242A
Zolfo Springs.............................  295A
------------------------------------------------------------------------


                                 Georgia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Adel......................................  221A
Albany....................................  242C1, 269A, 283C1
Alma......................................  282A
Americus..................................  234C3, 254C3
Ashburn...................................  289A
Athens....................................  238C, 284C
Atlanta...................................  225C1, 235C, 241C, 253C,
                                             259C, 277C
Augusta...................................  272A, 276A, 282C, 289C
Bainbridge................................  247C, 270A
Baxley....................................  233C
Blackshear................................  286C2
Blakely...................................  266C3
Blue Ridge................................  280A
Bolingbroke...............................  271A
Boston....................................  292A
Bostwick..................................  222A
Bowdon....................................  288A
Broxton...................................  279A
Brunswick.................................  264C1, 268C, 281A
Buford....................................  272A
Cairo.....................................  272A
Camilla...................................  288A
Canton....................................  289C2
Carrollton................................  221A
Chatsworth................................  255A
Chauncey..................................  267C2
Clarkesville..............................  275C3
Claxton...................................  297C3
Clayton...................................  281A
Cleveland.................................  270A
Cochran...................................  244A
Columbus..................................  275C, 285A, 297C
Coosa.....................................  237A
Cordele...................................  252A
Cornelia..................................  257C2
Crawford..................................  271C3
Cusseta...................................  279A
Cuthbert..................................  264A
Dahlonega.................................  282A
Dalton....................................  283A
Dawson....................................  221A
Dock Junction.............................  290C3
Donalsonville.............................  292A, 298A
Douglas...................................  258C1, 294C1
Dublin....................................  224C2, 240C1
Eastman...................................  248A
Eatonton..................................  249C3
Elberton..................................  221A, 286A
Ellijay...................................  228A
Evans.....................................  222A
Fayetteville..............................  248C3
Fitzgerald................................  245A
Folkston..................................  223A
Forsyth...................................  261A
Fort Valley...............................  250C3, 292C2
Gainesville...............................  246C
Gainsville................................  294C
Gibson....................................  232A
Glennville................................  292A
Gordon....................................  296A
Gray......................................  243A
Greensboro................................  280A
Greenville................................  239C3
Hampton...................................  300C1
Harlem....................................  236C3
Hawkinsville..............................  280C3
Hazlehurst................................  228C2
Helen.....................................  286A
Hinesville................................  222C2, 284C3
Hogansville...............................  251C3
Homerville................................  254A
Irwinton..................................  279A
Jackson...................................  221A
Jeffersonville............................  229C2
Jesup.....................................  288C3
Kingsland.................................  292A
La Grange.................................  281C1
Lakeland..................................  290C3
Leesburg..................................  278C3
Louisville................................  221A
Lumpkin...................................  257C2
Lyons.....................................  265A
Mableton..................................  273A
Macon.....................................  222A, 256C1, 287C1
Manchester................................  227C
Marietta..................................  268C
Martinez..................................  230C3, 299C2
McRae.....................................  274A
Metter....................................  279A
Midway....................................  252C1
Milan.....................................  285C2
Milledgeville.............................  264A, 272A
Millen....................................  235C3

[[Page 85]]

 
Montezuma.................................  236A
Moultrie..................................  230C1
Mt. Vernon................................  269A
Nashville.................................  237C3
Ocilla....................................  249A, 253A
Omega.....................................  298A
Peachtree City............................  244A
Pearson...................................  270A
Pelham....................................  222A
Perry.....................................  265A
Quitman...................................  287C3
Reidsville................................  281A
Richmond Hill.............................  287C3
Ringgold..................................  229A, 270A
Rockmart..................................  296C2
Rome......................................  249C3, 272A
Rossville.................................  288A
Roswell...................................  298C3
Royston...................................  279C3
Sandersville..............................  260A
Savannah..................................  226C1, 231C, 238C1, 243C,
                                             247C, 271C
Smithville................................  293A
Smyrna....................................  231C
Soperton..................................  291A
Sparta....................................  274A
Springfield...............................  280A
St. Marys.................................  227C2
St. Simons Island.........................  224A
Statenville...............................  248A
Statesboro................................  261C2, 275C3
Swainsboro................................  251A, 263A
Sylvania..................................  293A
Sylvester.................................  271A, 291A
Talking Rock..............................  261A
Tennille..................................  270A
Thomaston.................................  266A
Thomasville...............................  296C1
Thomson...................................  269A
Tifton....................................  223C3, 262C
Toccoa....................................  291C
Trenton...................................  274A
Trion.....................................  239A
Unadilla..................................  260A
Valdosta..................................  225C1, 239C1, 244C2, 266C1,
                                             300C3
Vidalia...................................  249A
Warner Robins.............................  269A, 273A
Warrenton.................................  226A
Washington................................  261A
Waycross..................................  249A, 273C1, 277C
Waynesboro................................  265A, 296C3
Westpoint.................................  265A
Wrens.....................................  245C3
Wrightsville..............................  298A
Zebulon...................................  223A
------------------------------------------------------------------------


                                 Hawaii
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aiea......................................  300C
Captain Cook..............................  226C1
Haiku.....................................  293C
Hali'imaile...............................  288A
Hanapepe..................................  232C1
Hilo......................................  224A, 234C1, 240C2, 246C2,
                                             250C1, 262C1
Holualoa..................................  221C2
Honokaa...................................  275C2
Honolulu..................................  226C, 230C1, 234C1, 238C,
                                             248C1, 253C1, 258C1, 262C1,
                                             286C, 290C
Kahalu'u..................................  291C
Kahului...................................  260C1
Kailua....................................  242C
Kailua-Kona...............................  230C
Kaneohe...................................  282C
Kaunakakai................................  272C
Kawaihae..................................  295A
Keaau.....................................  286C2
Kealakekua................................  268C1
Kekaha....................................  277C1
Kihei.....................................  298C2
Kurtistown................................  271A
Lahaina...................................  228C, 266C1
Lanai City................................  284C2
Lihue.....................................  228C1, 245C1, 251C1
Makawao...................................  232A
Nanakuli..................................  295A
Paauilo...................................  279C
Pearl City................................  270C
Poipu.....................................  240C1
Princeville...............................  255C1, 260C1
Pukalani..................................  252C2
Volcano...................................  299C3
Wahiawa...................................  278A
Wailuku...................................  236C
Waimea....................................  256C
Waipahu...................................  222C, 274C
------------------------------------------------------------------------


    Effective Date Note: At 64 FR 49088-49092, Sept. 10, 1999, Hawaii 
was amended by adding Captain Cook, channel 226C1, Nanakuli, channel 
295A, Wahiawa, channel 278A, Hanapepe, channel 232C1, Holualoa, channel 
221C2, Honokaa, channel 275C2, Kihei, channel 298C2, and Kurtistown, 
channel 271A, effective Oct. 12, 1999.

                                  Idaho
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aberdeen..................................  258C2
American Falls............................  281C1
Ashton....................................  243A
Blackfoot Falls...........................  247C, 268C,
Boise.....................................  222C, 250C, 282C, 286C
Bonners Ferry.............................  221A
Burley....................................  260C
Caldwell..................................  231C, 277C, 296C
Chubbuck..................................  253C2
Coeur D'Alene.............................  272A, 276C2
Driggs....................................  271A
Eagle.....................................  300C
Emmett....................................  270C
Franklin..................................  249A
Fruitland.................................  258C1
Garden City...............................  290C
Gooding...................................  264C3
Grangeville...............................  224C3
Hailey....................................  294C
Hayden....................................  233C
Hazelton..................................  232C3
Homedale..................................  292C
Idaho Falls...............................  241C, 256C1, 277C1, 288C1,
                                             296A
Island Park...............................  275C
Jerome....................................  275C1
Ketchum...................................  284C

[[Page 86]]

 
Kootenai..................................  294A
Lewiston..................................  243C1, 268C1, 286A, 295C
McCall....................................  252C1, 266C1, 294A
Moscow....................................  291C1
Mountain Home.............................  256C1
Nampa.....................................  235C, 245C
New Plymouth..............................  226C
Orofino...................................  237C3, 253A
Payette...................................  262C1
Pocatello.................................  221A, 229C, 235C, 273C
Preston...................................  244C1
Rexburg...................................  232C3, 251C1, 263C1
Rupert....................................  223C
Salmon....................................  224A, 233A
Sandpoint.................................  237C1, 273A
Shelley...................................  292C1
Soda Springs..............................  261A
Sun Valley................................  237C1, 279C, 298C
Twin Falls................................  239C1, 243C1, 252C1, 269A
Victor....................................  222A, 282A
Weston....................................  240A
Wallace...................................  248C2, 264C
------------------------------------------------------------------------


    Effective Date Note: At 64 FR 50010, Sept. 15, 1999, Idaho was 
amended by adding Kootenai, channel 294A and Hazelton, channel 232C3, 
effective Oct. 18, 1999.

                                Illinois
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aledo.....................................  272A
Alton.....................................  262B
Anna......................................  243C2
Arcola....................................  300A
Arlington Heights.........................  224A
Atlanta...................................  242A
Augusta...................................  253A
Aurora....................................  240A, 300B
Ava.......................................  280A
Bartonville...............................  260A
Beardstown................................  232A
Belvidere.................................  285A
Benton....................................  292B1
Bethalto..................................  238A
Bloomington...............................  268B
Breese....................................  248A
Bushnell..................................  284A
Canton....................................  252A, 300B1
Carbondale................................  268C1
Carlyle...................................  244A
Carmi.....................................  247B
Carrier Mills.............................  283A
Carterville...............................  236A
Carthage..................................  221B1, 230A
Casey.....................................  282B1
Cedarville................................  258A
Centralia.................................  237A
Champaign.................................  233B, 248B, 262B1
Charleston................................  221A
Chicago...................................  226B, 230B, 234B, 238B,
                                             242B, 246B, 250B, 254B,
                                             258B, 262B, 266B, 278B,
                                             282B, 298B
Chillicothe...............................  232A
Christopher...............................  278A
Clifton...................................  297A
Clinton...................................  240A
Coal City.................................  264A
Colchester................................  244A, 281A
Colfax....................................  255A
Columbia..................................  285C3
Crest Hill................................  252A
Crete.....................................  272A
Danville..................................  235A, 256B, 271B
Decatur...................................  226A, 236B, 275B
DeKalb....................................  223B, 235A
Des Planes................................  294B
Dixon.....................................  269A
Duquoin...................................  240A
Dundee....................................  280A
Dwight....................................  255A
Earlville.................................  275A
East Moline...............................  267B
East St. Louis............................  266C2
Effingham.................................  239B, 249A
Eldorado..................................  272A
Elgin.....................................  232A
Elmwood...................................  247B1
Elmwood Park..............................  290B
Eureka....................................  253A
Evanston..................................  286B
Fairbury..................................  299B1
Fairfield.................................  285A, 290A
Farmer City...............................  252A
Farmington................................  234A
Fisher....................................  273A
Flora.....................................  280A
Freeport..................................  221A, 253B, 295A
Galatia...................................  255A
Galena....................................  298A
Galesburg.................................  224A, 235B
Galva.....................................  273A
Gibson City...............................  292A
Glasford..................................  266A
Golconda..................................  232A
Granite City..............................  293C1
Greenville................................  269A
Harrisburg................................  260B
Havana....................................  257A
Henry.....................................  263A
Herrin....................................  224B1
Heyworth..................................  250A
Highland Park.............................  276A
Hillsboro.................................  259B
Hoopeston.................................  265A
Jacksonville..............................  263B
Jerseyville...............................  281B
Joliet....................................  228A, 244A
Kankakee..................................  224A, 236A, 260B
Kewanee...................................  230A
Knoxville.................................  287A
La Salle..................................  257B1
Lansing...................................  292A
Lawrenceville.............................  276A
Le Roy....................................  281B
Lena......................................  271A
Lexington.................................  258A
Lincoln...................................  230B1
Litchfield................................  291B
Loves Park................................  244A
Lynnville.................................  296A
Macomb....................................  240A, 261A, 274B1
Mahomet...................................  290A
Marion....................................  297B
Maroa.....................................  297A
Marseilles................................  243A
Marshall..................................  290A
Mattoon...................................  245B
Mendota...................................  261A
Metropolis................................  252C2, 288A
Moline....................................  245B
Monmouth..................................  249A

[[Page 87]]

 
Monticello................................  288A
Morris....................................  276A, 284B
Morrison..................................  274A
Morton....................................  272A
Mount Carmel..............................  235B
Mount Morris..............................  ............................
Mount Olive...............................  287A
Mount Vernon..............................  231B, 271B1
Mount Zion................................  257A
Murphysboro...............................  286B1
Nashville.................................  284A
Neoga.....................................  255A, 267B1
Newton....................................  278B1
Normal....................................  244A, 264A
Oak Park..................................  274B
Ogelsby...................................  271A
Olney.....................................  225B
Oregon....................................  239A
Ottawa....................................  237A
Pana......................................  265A
Paris.....................................  253B
Paxton....................................  285A
Pekin.....................................  238B1, 285A
Peoria....................................  222A, 227B, 289B, 295B
Peru......................................  265A
Petersburg................................  249A
Pinckneyville.............................  282A
Pittsfield................................  248B1
Plano.....................................  296A
Polo......................................  299A
Pontiac...................................  229B1
Princeton.................................  251A
Quincy....................................  258B, 280A, 286B
Ramsey....................................  227A
Rantoul...................................  237A, 241A
Robinson..................................  269A
Rochelle..................................  272A
Rock Island...............................  255B
Rockford..................................  248B, 265A
Rockton...................................  276A
Rushville.................................  223A
Salem.....................................  261A
Savanna...................................  262B1
Seneca....................................  239A
Shelbyville...............................  286B1
Skokie....................................  270B
South Jacksonville........................  288A
Spring Valley.............................  277A
Springfield...............................  254B, 270B, 279B, 283B
Sterling..................................  232A
Streator..................................  249A, 291A
Sullivan..................................  294B1
Taylorville...............................  224B1, 232A, 247A
Teutopolis................................  272A
Tower Hill................................  252A
Tuscola...................................  228A
Urbana....................................  223B1, 296A
Vandalia..................................  296A
Virden....................................  244A
Virginia..................................  267A
Watseka...................................  231B
Waukegan..................................  272A
West Frankfort............................  249A
Wilmington................................  288A
Winnebago.................................  237A
Woodlawn..................................  295A
Woodstock.................................  288A
Zion......................................  245B
------------------------------------------------------------------------


                                 Indiana
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alexandria................................  224A
Anderson..................................  250B, 254A
Angola....................................  262A
Attica....................................  239A
Auburn....................................  272A
Aurora....................................  257A
Austin....................................  224A, 242A
Batesville................................  280A
Battle Ground.............................  254A
Bedford...................................  288A
Berne.....................................  224A
Bicknell..................................  289A
Bloomfield................................  266A
Bloomington...............................  222B, 224A, 279B
Bluffton..................................  261A
Booneville................................  296A
Brazil....................................  249A
Bremen....................................  245A
Brookston.................................  237A
Brownsburg................................  270A
Cannelton.................................  275C3
Chandler..................................  228A
Charlestown...............................  282A
Churubusco................................  242B1
Clarksville...............................  226A
Clinton...................................  230A
Columbia City.............................  292A
Columbus..................................  268B, 285A
Connersville..............................  262B
Corydon...................................  243A, 299B
Covington.................................  276A
Crawfordsville............................  280A, 292A
Crown Point...............................  280A
Danville..................................  296A
Decatur...................................  286B1
Delphi....................................  275A
Earl Park.................................  251B1
Edinburgh.................................  275A
Elkhart...................................  264B, 284B
Ellettsville..............................  286A
Elwood....................................  269A
Evansville................................  281B, 287B, 298A
Farmersburg...............................  242A
Ferdinand.................................  253A
Fort Branch...............................  268A
Fort Wayne................................  222A, 236B, 247B, 269A, 280A
Fowler....................................  291A
Frankfort.................................  259B
Franklin..................................  240A
French Lick...............................  261A
Goshen....................................  249A
Greencastle...............................  232A
Greenfield................................  258B
Greensburg................................  297B
Greenwood.................................  294A
Hammond...................................  222B
Hardinsburg...............................  245A
Hartford City.............................  228A
Huntingburg...............................  265B1
Huntington................................  275A
Indianapolis..............................  226B, 234B, 238B, 242A,
                                             277B, 283B, 289B, 300B
Jasper....................................  284B
Jeffersonville............................  239B
Kendallville..............................  227B
Kentland..................................  269A
Knox......................................  257A
Kokomo....................................  223A, 263B
La Porte..................................  244A
Lafayette.................................  228A, 243B, 287B
Lagrange..................................  288A
Lebanon...................................  265A

[[Page 88]]

 
Ligonier..................................  274A
Linton....................................  227B1
Logansport................................  272A
Loogootee.................................  233A
Lowell....................................  296A
Madison...................................  244A, 266A
Marion....................................  295B
Martinsville..............................  272A
Michigan City.............................  240A
Mitchell..................................  273A
Monticello................................  299A
Mount Vernon..............................  294A
Muncie....................................  221A, 281B, 285A
Nappanee..................................  239A
Nashville.................................  236A
New Albany................................  234A
New Carlisle..............................  272A
New Castle................................  273B
New Haven.................................  300A
Newburgh..................................  291A
Noblesville...............................  230A
North Vernon..............................  291B
Paoli.....................................  237A
Peru......................................  253A
Petersburg................................  272A
Plainfield................................  252A
Plymouth..................................  232B1
Portland..................................  265A
Princeton.................................  251B, 263A
Rensselaer................................  249A
Richmond..................................  241B, 267B
Roann.....................................  270A
Roanoke...................................  231A
Rochester.................................  221A
Rockville.................................  285A
Royal Center..............................  279A
Rushville.................................  232A
Salem.....................................  250A
Santa Clause..............................  277A
Scottsburg................................  287A
Seelyville................................  240A
Seymour...................................  229B
Shelbyville...............................  246B
South Bend................................  225B, 268B, 276A, 280A, 292A
South Whitley.............................  266A
Spencer...................................  224A
Sullivan..................................  237A
Syracuse..................................  278A
Tell City.................................  289A
Terre Haute...............................  260B, 264B, 274B, 298B
Valparaiso................................  288A
Van Buren.................................  257A
Veedersburg...............................  225A
Versailles................................  276A
Vevay.....................................  240A
Vincennes.................................  221A, 244A
Wabash....................................  240A, 290A
Walton....................................  229A
Warsaw....................................  297B
Washington................................  293B, 300A
West Lafayette............................  *267A, 294A
West Terre Haute..........................  288A
Winamac...................................  261A
Winchester................................  252A
------------------------------------------------------------------------


                                  Iowa
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albia.....................................  244C3
Algona....................................  224C2
Alta......................................  248A
Ames......................................  281C, 286C3
Anamosa...................................  239A
Ankeny....................................  223C2, 292C3
Asbury....................................  238A, 277C3
Atlantic..................................  239C3
Audubon...................................  243C1
Belle Plaine..............................  238C3
Bettendorf................................  228A
Bloomfield................................  292C3
Boone.....................................  252C2, 257A
Britt.....................................  258A
Brooklyn..................................  256C2
Burlington................................  228A, 297C1, 276C3
Carroll...................................  229C1
Castana...................................  298C3
Cedar Falls...............................  253C3
Cedar Rapids..............................  243C1, 251C1, 275C1, 283C1
Centerville...............................  254C1
Chariton..................................  287C2
Charles City..............................  240A
Cherokee..................................  221A 272A
Clarinda..................................  257C2
Clarion...................................  245C1
Clear Lake................................  276A
Clinton...................................  241C1, 234A
Council Bluffs............................  253C
Cresco....................................  272A
Creston...................................  267C3
Davenport.................................  279C, 293C1
Decorah...................................  263C2, 284A
Denison...................................  296A
Des Moines................................  227C1, 235C, 247C1, 262C,
                                             273C, 298C1
DeWitt....................................  285C3
Dubuque...................................  225C1, 272A, 287C2
Dunkerton.................................  280A
Dyersville................................  257A
Eagle Grove...............................  264C3
Eddyville.................................  268C2
Eldon.....................................  282C3
Eldora....................................  258A
Emmetsburg................................  252A, 261A
Epworth...................................  247C3
Estherville...............................  240C3
Fairfield.................................  240A
Forest City...............................  297C2
Fort Dodge................................  221A, 233C1
Fort Madison..............................  269A
Garnavillo................................  261A
Glenwood..................................  279C
Grinnell..................................  294C2
Grundy Center.............................  249C3
Hampton...................................  285A
Harlan....................................  287C3
Hudson....................................  241A
Humboldt..................................  249A
Ida Grove.................................  225C3
Independence..............................  237A
Iowa City.................................  231C1, 264C1
Iowa Falls................................  237A
Jefferson.................................  255C3
Keokuk....................................  237C1
Knoxville.................................  221C3
Lake City.................................  294C3
Lamoni....................................  250C3
Le Mars...................................  258C1
Madrid....................................  241A
Manchester................................  234C3
Manson....................................  259A
Maquoketa.................................  236A
Marshalltown..............................  266C1

[[Page 89]]

 
Mason City................................  230C1, 250A, 291C1
Milford...................................  271C2
Mount Pleasant............................  288C3
Muscatine.................................  226A, 259C1
New Hampton...............................  236A
New London................................  247A
New Sharon................................  260C3
Newell....................................  265A
Newton....................................  240A
Northwood.................................  274C3
Oelwein...................................  222C
Onawa.....................................  272C1
Osage.....................................  254A
Osceola...................................  296C2
Oskaloosa.................................  285C2
Ottumwa...................................  224C3, 249C3
Parkersburg...............................  255A
Patterson.................................  290A
Pella.....................................  277C1
Perry.....................................  288A
Pleasantville.............................  242A
Red Oak...................................  237C3
Rock Valley...............................  295C3
Rudd......................................  268A
Sac City..................................  284A
Sageville.................................  291A
St. Ansgar................................  238A
Sheldon...................................  287C2
Sibley....................................  262A, 282A
Sioux Center..............................  230C2
Sioux City................................  238C1, 250C1, 277C1
Sioux Rapids..............................  275C2
Spencer...................................  285C3, 299C1
Spirit Lake...............................  280C2
Storm Lake................................  269C1
Stuart....................................  300C3
Twin Lakes................................  290C3
Washington................................  291A
Waterloo..................................  270C, 289C, 300C
Waukon....................................  278C2
Waverly...................................  257A
Webster City..............................  239C3
Winterset.................................  258A
------------------------------------------------------------------------


                                 Kansas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abilene...................................  253C1
Andover...................................  230C3
Arkansas City.............................  273A, 293C
Atkins....................................  257A
Augusta...................................  283C2, 263A
Baxter Springs............................  296A
Belle Plaine..............................  224C3
Belleville................................  221C3
Beloit....................................  288C2
Burdett...................................  228A
Burlington................................  237A
Caney.....................................  266A
Cawker City...............................  242C3
Chanute...................................  228A
Cimarron..................................  222A
Clay Center...............................  265A
Clearwater................................  254C2
Coffeyville...............................  225A
Colby.....................................  250C1, 262C1
Columbus..................................  287C3
Concordia.................................  235C1
Copeland..................................  251C1, 256C1, *280C1
Council Grove.............................  281C3
Dearing...................................  251A
Derby.....................................  242C2
Dodge City................................  230C1, 238C1
Downs.....................................  231C2
El Dorado.................................  256C1
Emporia...................................  258A, 269A, 285A
Eureka....................................  228A
Fort Scott................................  280A, 284C3
Fredonia..................................  281A
Galena....................................  282A
Garden City...............................  247C1
Girard....................................  256A
Goodland..................................  273C1, 299C1
Great Bend................................  282C1, 300C1
Hays......................................  258C1, 277C
Haysville.................................  287C
Herington.................................  289C3
Hiawatha..................................  280C2
Hill City.................................  270C
Hoisington................................  264C1
Horton....................................  229C3
Hugoton...................................  294C2
Humboldt..................................  232C3
Hutchinson................................  240A, 246C3, 271C, 275C
Independence..............................  275A
Ingalls...................................  242C1, 290C1
Iola......................................  257A
Junction City.............................  233C1
Kansas City...............................  231C, 251C
Kingman...................................  232C2, 262C2
Kiowa.....................................  252C1
Larned....................................  244A, 295C1
Lawrence..................................  290C1
Leavenworth...............................  255C
Leoti.....................................  260C1
Liberal...................................  268C1, 274C1, 286C2, 298C1
Lindsborg.................................  269C3, 238C3
Lyons.....................................  291C1
Manhattan.................................  268C2, 284C2
Marysville................................  276C3
McPherson.................................  244A
Medicine Lodge............................  269C2
Minneapolis...............................  224C2
Ness City.................................  285A
Newton....................................  222C1
North Fort Riley..........................  273C1
Norton....................................  294A
Oberlin...................................  266C1
Ogden.....................................  278C2
Olathe....................................  222C3
Osage City................................  225C2
Ottawa....................................  239C1
Parsons...................................  228A
Phillipsburg..............................  223C1, 237A
Pittsburg.................................  245C1
Plainville................................  244A
Pratt.....................................  226C
Riley.....................................  242C3
Rozel.....................................  273A
Russell...................................  240A
Salina....................................  229C1, 260C1, 285A
Scott City................................  223C1
Seneca....................................  221A
Silver Lake...............................  223A
Sterling..................................  234C3
St. Marys.................................  275C2
Topeka....................................  247C, 257A, 262C, 295C, 299C
Wamego....................................  237A
Wellington................................  228A
Wichita...................................  236C1, 250C, 267C, 279C1,
                                             297C1
Winfield..................................  240C3, 300C2
------------------------------------------------------------------------


[[Page 90]]


    Effective Date Note: At 64 FR 47406, 47408, Aug. 31, 1999, Kansas 
was amended by adding Cimarron, channel 222A; by adding channel 263A at 
Augusta, effective Oct. 4, 1999.

                                Kentucky
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albany....................................  292A
Allen.....................................  261A
Annville..................................  244A
Ashland...................................  229C1
Barbourville..............................  241C3
Bardstown.................................  244A
Beattyville...............................  271A
Benton....................................  256A
Berea.....................................  294A
Bowling Green.............................  244C3, 227C3
Brandenburg...............................  228A
Brodhead..................................  270A
Brownsville...............................  264C3
Burkesville...............................  300A
Burnside..................................  230C2
Calvert City..............................  239A
Campbellsville............................  281C3
Campton...................................  279A
Carlisle..................................  221C3
Carrollton................................  237A
Catlettsburg..............................  224A
Cave City.................................  279C3
Central City..............................  270C1
Clinton...................................  271C3
Columbia..................................  228A
Corbin....................................  258C2, 297C2
Cumberland................................  274A
Cynthiana.................................  272A
Danville..................................  296A
Drakesboro................................  280A
Edmonton..................................  256A
Elizabethtown.............................  252C3, 261A
Elkhorn City..............................  276A
Eminence..................................  289A
Erlanger..................................  265A
Falmouth..................................  298A
Flemingsburg..............................  236A
Fort Campbell.............................  300C1
Fort Knox.................................  288A
Frankfort.................................  279A, 285A
Fredonia..................................  221A
Fulton....................................  257A
Garrison..................................  252A
Georgetown................................  277A
Glasgow...................................  231A, 236C, 287C3
Grayson...................................  272A
Greensburg................................  276A
Greenup...................................  289C3
Greenville................................  228C3
Hardinsburg...............................  232C2, 282A
Harlan....................................  286A
Harold....................................  285A
Harrodsburg...............................  257A
Hartford..................................  292A
Hazard....................................  266C, 284A
Henderson.................................  258C, 276A
Hindman...................................  296A
Hodgenville...............................  292A
Hopkinsville..............................  248A, 254C1, 262C
Horse Cave................................  294A
Hyden.....................................  250C3
Irvine....................................  264C3
Jackson...................................  293A
Jamestown.................................  285A
Jeffersontown.............................  267A
Jenkins...................................  232C2
La Center.................................  282A
Lancaster.................................  286A
Lawrenceburg..............................  271A
Lebanon...................................  265C3
Leitchfield...............................  285A
Lexington.................................  225C1, 233C1, 251C1
Lexington-Fayette.........................  283C2
Liberty...................................  254C3
London....................................  222C2, 280A
Louisa....................................  222A
Louisville................................  248C1, 259B, 263C2, 272A,
                                             280A, 295B
Madisonville..............................  230C2
Manchester................................  276A, 289C3
Mannsville................................  260C3
Marion....................................  274A
Mayfield..................................  234C2
Maysville.................................  240A
McKee.....................................  300A
Middlesboro...............................  224A
Midway....................................  300A
Monticello................................  226A, 269A
Morehead..................................  242A, 291C3
Morganfield...............................  237A
Mount Sterling............................  288C3, 294B1
Mount Vernon..............................  275A
Munfordville..............................  272A
Murray....................................  279C1
Nicholasville.............................  273A
Oak Grove.................................  293C3
Owensboro.................................  223C, 241C
Owingsville...............................  299A
Paducah...................................  227C1, 245C1
Paintsville...............................  255C1
Paris.....................................  245C2
Philpot...................................  234A
Pikeville.................................  226C2
Pineville.................................  292A
Prestonsburg..............................  238C, 287A
Princeton.................................  285A
Providence................................  249A
Radcliff..................................  278C3
Reidland..................................  294A
Richmond..................................  268C3
Russellville..............................  266C1
Russell Springs...........................  224A
St. Matthews..............................  276A
Salyersville..............................  247C3
Scottsville...............................  257A
Shelbyville...............................  269A
Shepherdsville............................  286A
Smith Mills...............................  233A
Smiths Grove..............................  296C2
Somerset..................................  246C2, 272A
Springfield...............................  274A
Stamping Ground...........................  241A
Stanford..................................  242C3
Stanton...................................  285A
Sturgis...................................  267A
Tompkinsville.............................  221A, 274A
Valley Station............................  290A
Vanceburg.................................  285A
Vancleve..................................  260A
Versailles................................  292A
Vine Grove................................  268A
Virgie....................................  298A
Whitesburg................................  280A
Whitesville...............................  246A
Whitley City..............................  252A
Wickliffe.................................  240A
Williamsburg..............................  282A

[[Page 91]]

 
Williamstown..............................  293A
Wilmore...................................  237A
Winchester................................  261C2
West Liberty..............................  275A
Westwood..................................  259A
------------------------------------------------------------------------


                                Louisiana
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abbeville.................................  286C3
Alexandria................................  226C, 230A, 245C, 262C, 295A
Amite.....................................  243A
Arcadia...................................  223A
Atlanta...................................  293A
Baker.....................................  297A
Ball......................................  288A
Basile....................................  271C1
Bastrop...................................  230C3, 232A, 261C2, 247A
Baton Rouge...............................  251C, 264C1, 268C, 273C
Bayou Vista...............................  237C3
Belle Chasse..............................  275C3
Benton....................................  221A
Berwick...................................  290A
Blanchard.................................  271C3
Boyce.....................................  272C3
Breaux Bridge.............................  243C3
Brusly....................................  241C2
Bunkie....................................  282C3
Clayton...................................  257A
Clinton...................................  224C2
Columbia..................................  276C3
Coushatta.................................  235C2
Crowley...................................  275C
Delhi.....................................  228A
Deridder..................................  221C3, 250A
Donaldsonville............................  285A
Dubach....................................  249C3
Erath.....................................  300C1
Eunice....................................  288A
Farmerville...............................  224A
Ferriday..................................  296C3
Folsom....................................  285A
Franklin..................................  288A, 295C3
Franklinton...............................  255A
Galliano..................................  232C1
Gibsland..................................  283A
Golden Meadow.............................  289C2
Grand Isle................................  283A
Hammond...................................  277C, 296A
Haughton..................................  279A
Haynesville...............................  288A
Homer.....................................  272A, 294C2
Houma.....................................  281C, 298C1
Jackson...................................  283A
Jena......................................  274A
Jennings..................................  225C2
Jonesboro.................................  285C3
Jonesville................................  286A
Kaplan....................................  247C2
Kenner....................................  287C1
Kentwood..................................  231C1
Lacombe...................................  234A
Lafayette.................................  233C, 238C2, 260C
Lake Arthur...............................  298C2
Lake Charles..............................  241C, 258C1, 279C1, 287C2
Lake Providence...........................  224A
LaPlace...................................  222C
Larose....................................  262C2
Leesville.................................  224A, 228C3, 289C3
Mamou.....................................  266C3
Mansfield.................................  224A, 284C3
Mansura...................................  240A
Many......................................  296C3
Marksville................................  249A
Maurice...................................  292A
Minden....................................  239C2
Monroe....................................  270C, 281C, 287C2, 291C
Moreauville...............................  221A
Morgan City...............................  244C3
Natchitoches..............................  247C3, 264C3
New Iberia................................  229C1, 256C
New Orleans...............................  227C, 239C, 246C, 253C1,
                                             258C, 266C, 270C
New Roads.................................  293C2
North Fort Polk...........................  294A
Oak Grove.................................  244C3
Oakdale...................................  254C1
Opelousas.................................  290A, 296A
Port Sulphur..............................  294C1
Rayne.....................................  294A
Rayville..................................  222C2
Reserve...................................  235C3
Richwood..................................  265A
Ruston....................................  257C3, 298C
Shreveport................................  229C, 233C, 243C1, 259C2,
                                             266C, 275C2
South Fort Polk...........................  239A
Springhill................................  225C2
Sulphur...................................  267C3
Tallulah..................................  283C3
Thibodaux.................................  292C3
Tioga.....................................  278C2
Varnado...................................  225A
Vidalia...................................  284A
Ville Platte..............................  223A
Vivian....................................  287A
Washington................................  284C3
West Monroe...............................  252C2
Winnfield.................................  221A
Winnsboro.................................  240A
------------------------------------------------------------------------


    Effective Date Note: At 64 FR 50256, Sept. 16, 1999, Louisiana was 
amended by adding Golden Meadow, channel 289C2, effective Oct. 18, 1999.

                                  Maine
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Auburn....................................  260B
Augusta...................................  222B, 267B
Bangor....................................  225B, 246B
Bar Harbor................................  256B, 299B1
Bath......................................  290B
Belfast...................................  284B
Biddeford.................................  232B1
Boothbay Harbor...........................  244B1
Brewer....................................  262B, 293C
Brunswick.................................  255B
Calais....................................  224A
Camden....................................  273B
Caribou...................................  249C3
Dennysville...............................  275C1
Dexter....................................  271C2
Dover-Foxcroft............................  276A
Ellsworth.................................  233B, 239B
Fairfield.................................  228C3
Farmington................................  257A
Fort Kent.................................  *293C3
Gardiner..................................  282B

[[Page 92]]

 
Houlton...................................  261C3
Howland...................................  280C
Islesboro.................................  288B1
Kennebunk.................................  257A
Kennebunkport.............................  284A
Kittery...................................  287A
Lewiston..................................  230B, 298B
Lincoln...................................  289C2
Machias...................................  237A, 266B
Madawaska.................................  272A
Madison...................................  248A
Mexico....................................  264A
Milbridge.................................  229B
Millinocket...............................  235C2
North Windham.............................  294A
Norway....................................  224A
Old Town..................................  297C2
Pittsfield................................  258A
Portland..................................  226B, 250B, 270B, 275C
Presque Isle..............................  241C, 245C, 270C2, 291C
Rockland..................................  277B
Rumford...................................  242C
Saco......................................  240A
Sanford...................................  221A
Scarborough...............................  292A
Searsport.................................  269A
Skowhegan.................................  286C, 300C3
Thomaston.................................  295, 295B
Topsham...................................  238A
Van Buren.................................  251A
Waterville................................  253C2
Westbrook.................................  265B1
Winslow...................................  237A
Winter Harbor.............................  249B
York Center...............................  237A
------------------------------------------------------------------------


                                Maryland
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Annapolis.................................  256B, 300B
Baltimore.................................  222B, 226B, 236B, 250B,
                                             270B, 274B, 282B, 293B
Berlin....................................  280A
Bethesda..................................  234B, 272A
Braddock Heights..........................  280A
California................................  275A
Cambridge.................................  292A
Catonsville...............................  289B
Crisfield.................................  245A
Cumberland................................  275B, 291B
Easton....................................  244B1
Federalsburg..............................  296A
Frederick.................................  260B
Frostburg.................................  *246A, 287B
Glen Burnie...............................  240A
Grasonville...............................  276A
Hagerstown................................  284B, 295B
Halfway...................................  244A
Havre De Grace............................  279B
Hurlock...................................  265A
Lexington Park............................  249A
Mechanicsville............................  252A
Middletown................................  276A
Midland...................................  258A
Morningside...............................  238B
Mountain Lake Park........................  283A
Oakland...................................  222A
Ocean City................................  260B, 295A
Ocean City-Salisbury......................  284B
Ocean Pines...............................  246A
Pocomoke City.............................  223A, 293A
Prince Frederick..........................  224A
Princess Anne.............................  273B
Salisbury.................................  248A, 255A, 288A
Snow Hill.................................  266A
St. Michaels..............................  232A
Waldorf...................................  281, 281B
Westernport...............................  266A
Westminster...............................  264B
Williamsport..............................  240A
------------------------------------------------------------------------


                              Massachusetts
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Amherst...................................  265A
Athol.....................................  260A
Barnstable................................  260B
Boston....................................  233B, 245B, 253B, 264B,
                                             277B, 281B, 294B
Brewster..................................  232A
Brockton..................................  249A
Brookline.................................  225B
Cambridge.................................  237A
Chatham...................................  298B
Fairhaven.................................  296A
Falmouth..................................  270B
Fitchburg.................................  283B
Framingham................................  289B
Gloucester................................  285A
Great Barrington..........................  286A
Greenfield................................  237A, 252A
Harwichport...............................  228A
Haverhill.................................  223B
Hyannis...................................  275A, 291B
Lawrence..................................  229B
Lowell....................................  258B
Lynn......................................  269A
Marshfield................................  240A
Mashpee...................................  266A
Medford...................................  300B
Nantucket.................................  242B
New Bedford...............................  247B, 251B
North Adams...............................  261A
Northampton...............................  257A, 292A
Orange....................................  247A
Orleans...................................  284B
Pittsfield................................  240A, 269A, 288A
Plymouth..................................  256B
Provincetown..............................  *221A
Southbridge...............................  261A
South Yarmouth............................  280A
Spencer...................................  255A
Springfield...............................  226B, 234B, 271B
Taunton...................................  227B
Tisbury...................................  224A
Truro.....................................  272A
Turners Falls.............................  230A
Waltham...................................  273B
West Tisbury..............................  282A
West Yarmouth.............................  235B
Winchendon................................  249A
Worcester.................................  241B, 297B
------------------------------------------------------------------------


                                Michigan
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Adrian....................................  237A, 280A
Albion....................................  244A

[[Page 93]]

 
Allegan...................................  222A
Alma......................................  285A
Alpena....................................  257C2, 299C1
Ann Arbor.................................  275B, 296A
Ashley....................................  223A
Atlanta...................................  223C
Bad Axe...................................  271C2
Baraga....................................  282C1
Battle Creek..............................  237A, 277B
Bay City..................................  241C, 273B
Bear Lake.................................  261A
Beaverton.................................  249A
Benton Harbor.............................  235A, 260B
Beulah....................................  221A
Big Rapids................................  265A, 272C3
Birmingham................................  234B
Boyne City................................  228C2
Bridgman..................................  248A
Bronson...................................  *234A
Brooklyn..................................  287A
Buchanan..................................  256A
Cadillac..................................  225C, 244C3, 296A
Caro......................................  221A
Carrollton................................  263A
Charlevoix................................  290C1, 300A
Charlotte.................................  224A
Cheboygan.................................  286C1
Clare.....................................  237A
Coldwater.................................  253B
Coleman...................................  269A
Crystal Falls.............................  264C1
Dearborn..................................  262B
Detroit...................................  222B, 226B, 238B, 242B,
                                             246B, 250B, 254B, 258B,
                                             266B, 270B, 278B, 282B,
                                             286B, 290B, 294B, 298B
Dewitt....................................  243A
Dowagiac..................................  221A
East Jordan...............................  265A
East Lansing..............................  235B, 256B
Escanaba..................................  284C, 246C
Essexville................................  247A
Fife Lake.................................  240A
Flint.....................................  224A, 236B, 288B1, 300B
Frankenmuth...............................  229A
Frankfort.................................  257C2
Fremont...................................  261A
Gaylord...................................  268A, 294C1
Gladstone.................................  288C3
Gladwin...................................  276C3,
Glen Arbor................................  227A, 238C2, 251C2
Grand Haven...............................  221A
Grand Rapids..............................  229B, 239B, 245B, 250B,
                                             254A, 267B, 275B, 281B,
                                             289B
Grayling..................................  262C1
Greenville................................  297B
Gulliver..................................  234C1
Hancock...................................  228C3, 254C2
Harbor Beach..............................  279C2
Harbor Springs............................  280C2
Harrietta.................................  229A
Harrison..................................  221A
Hart......................................  287C1
Hartford..................................  279A
Hastings..................................  261A
Hillman...................................  235C2
Hillsdale.................................  221A
Holland...................................  233B, 241B
Honor.....................................  264A
Houghton..................................  242C1, 249A, 272C2
Houghton Lake.............................  253C1
Howell....................................  228A
Hudson....................................  273A
Iron Mountain.............................  226C1, 268C1, 294A
Iron River................................  256C2
Ironwood..................................  259C1, 295C1
Ishpeming.................................  222C, 298C1
Jackson...................................  231B, 283A, 291B
Kalamazoo.................................  271B, 293B, 299B
Kalkaska..................................  248C2
Kingsford.................................  251A
L'Anse....................................  291C2
Lake City.................................  *285A
Lakeview..................................  292A
Lansing...................................  248B, 264B, 269A
Lapeer....................................  276A
Leland....................................  232C2
Lexington.................................  245A
Ludington.................................  292A
Mackinaw City.............................  233C3
Manistee..................................  249A, 268A
Manistique................................  260A
Marlette..................................  223A
Marquette.................................  239C1, 277C1, 231A
Marshall..................................  285A
McMillan..................................  244C3
Menominee.................................  279C3
Midland...................................  227C2, 259C
Mio.......................................  280C2
Monroe....................................  252A
Mount Clemens.............................  274B
Mount Pleasant............................  233C1, 282A
Munising..................................  252 C2
Muskegon..................................  283B, 295B, 300B1
Muskegon Heights..........................  269B1
Negaunee..................................  258A, 270C2
Newaygo...................................  223A
Newberry..................................  229A, 250C2
Niles.....................................  237A
North Muskegon............................  252A
Norway....................................  232C3
Ontonagon.................................  266C2
Oscoda....................................  239 C2, 264C3
Otsego....................................  265A
Owosso....................................  280A
Pentwater.................................  231C3, 274A
Petoskey..................................  242C1, 255C1
Pickford..................................  288A
Pinconning................................  265A, 281A
Port Huron................................  272A, 296A
Portage...................................  243A
Reed City.................................  247A
Rogers City...............................  244C2, 260C2
Roscommon.................................  266A
Saginaw...................................  251B, 283A, 292A, 296A
Sandusky..................................  249A
Saugatuck.................................  224A
Sault Ste. Marie..........................  252C3, 258C2, 267C1, *272C3
Scottville................................  235C3
South Haven...............................  252A
Spring Arbor..............................  295A
St. Ignace................................  275C
St. Johns.................................  221A
St. Joseph................................  296A
Standish..................................  245A
Stephenson................................  257A, 292C2
Sturgis...................................  257A
Tawas City................................  277A, 284C2, 291C3
Three Rivers..............................  240A
Traverse City.............................  270C1, 278C, 283A, 29C2
Tuscola...................................  268A
Vassar....................................  255A
Walhalla..................................  255A
Walker....................................  263A

[[Page 94]]

 
West Branch...............................  288A
Whitehall.................................  237A, 248A
Zeeland...................................  257A
------------------------------------------------------------------------


                                Minnesota
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ada.......................................  292A
Aitkin....................................  232C3
Albany....................................  288A
Albert Lea................................  235A, 241A
Alexandria................................  222C3, 257A, 264C1
Anoka.....................................  300C
Atwater...................................  231A
Austin....................................  260C1
Babbitt...................................  294C2
Bagley....................................  244C3
Bemidji...................................  238C1, 266C1, 279C1
Benson....................................  228A
Belview...................................  290A
Blackduck.................................  252C2
Blooming Prarie...........................  265C1
Blue Earth................................  251C3, 283C2
Brainerd..................................  278C3, 294C1, 298C1
Breckenridge..............................  286C1
Breezy Point..............................  282 C2
Browerville...............................  259A
Buhl......................................  *223C2
Caledonia.................................  234A
Cambridge.................................  287C3
Cloquet...................................  243C3, 263C1
Cold Spring...............................  235C2
Coleraine.................................  241C1
Crookston.................................  241C1, 246C1
Crosby....................................  268C3
Dassel....................................  295C3
Deer River................................  288C1
Detroit Lakes.............................  236C1, 272C2
Duluth....................................  225C1, 235C1, 239C1, *240C2,
                                             255C2, 269C2, 277C1, 286C1
East Grand Forks..........................  282C1
Eden Prairie..............................  289A
Ely.......................................  233A
Eveleth...................................  250C1
Farimont..................................  293C1
Fairbault.................................  298C2
Fergus Falls..............................  243C1, 277C1
Forest Lake...............................  240A
Fosston...................................  296C2
Glencoe...................................  242C2
Glenwood..................................  296A
Golden Valley.............................  223C
Grand Marais..............................  237C1
Grand Rapids..............................  245C1
Granite Falls.............................  230A
Hermantown................................  221C3
Hibbing...................................  230C1, 292C3
International Falls.......................  258C1, 281C3
Jackson...................................  289C3
La Crescent...............................  274C3
Lake City.................................  235A, 273C3
Lake Crystal..............................  239A
Lakeville.................................  286A
Lanesboro.................................  280A
Little Falls..............................  221A, 231A
Luverne...................................  266C1
Madison...................................  221C3
Mahnomen..................................  268C3
Mankato...................................  256C1, 278C1
Marshall..................................  259C1, 298C3
Minneapolis...............................  229C, 246C, 253C, 258C,
                                             262C1, 275C
Mantevideo................................  288A
Moose Lake................................  296C3
Moorhead..................................  254C1, 260C1
Mora......................................  238C3
Morris....................................  239C1
Nashwauk..................................  275C3
New Prague................................  238A
New Ulm...................................  226C1
Nisswa....................................  227C
North Mankato.............................  244C3
Olivia....................................  261C3
Ortonville................................  268C, 292A
Osakis....................................  280A
Owatonna..................................  285A
Park Rapids...............................  223C3, 248C1
Paynesville...............................  255C2
Pelican Rapids............................  281C2
Perham....................................  258A
Pequot Lakes..............................  261A, 274C2
Pillager..................................  240A
Pine City.................................  265A
Pipestone.................................  254C
Preston...................................  276C3
Princeton.................................  291C2
Proctor...................................  299C2
Red Lake..................................  231C1
Red Wing..................................  290A, 290C3
Redwood Falls.............................  249C1
Richfield.................................  267C
Rochester.................................  *225A, 243C2, 248C, 269C2,
                                             295C
Roseau....................................  271C2, 278C2
Rushford..................................  257C3
Saint Joseph..............................  260A
Sartell...................................  244C2
Sauk Centre...............................  232A
Sauk Rapids...............................  269C2
Slayton...................................  291C2
Sleepy Eye................................  297A
Spring Grove..............................  252C2
Spring Valley.............................  282C3
Springfield...............................  234C2
St. Charles...............................  299A
St. Cloud.................................  251C, 284C
St. James.................................  263C2, 268C3
St. Joseph................................  225C3
St. Louis Park............................  281C
St. Paul..................................  233C, 237A, 271C
St. Peter.................................  288A
Staples...................................  234C2
Starbuck..................................  247C2
Stewartville..............................  287C2
Thief River Falls.........................  257C3, 262C1, 274C1
Tracy.....................................  286C2
Two Harbors...............................  282C2
Vernon Center.............................  231A
Virginia..................................  260C1
Wadena....................................  290C1
Waite Park................................  279C3
Walker....................................  256C1, 270C2, 275C3
Warroad...................................  223C1
Waseca....................................  221C3
Willmar...................................  237C2, 273C1
Windom....................................  232A
Winona....................................  237C3, 266C3
Worthington...............................  228A, 236C1
------------------------------------------------------------------------


[[Page 95]]


                               Mississippi
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aberdeen..................................  287C2
Ackerman..................................  300C
Amory.....................................  237A
Artesia...................................  261A, 260C2
Baldwyn...................................  223A
Batesville................................  263C2
Bay Springs...............................  232C2
Bay St. Louis.............................  300C
Belzoni...................................  296C3
Biloxi....................................  229C
Booneville................................  257A
Brandon...................................  249A
Brookhaven................................  221A
Brooksville...............................  255C3
Bruce.....................................  233A
Bude......................................  282C3
Byhalia...................................  235A
Calhoun City..............................  272A
Canton....................................  269A
Carthage..................................  252C3
Centreville...............................  285A
Charleston................................  239A
Clarksdale................................  221A, 243A, 268A, 293C2
Cleveland.................................  225C2, 252C3, 280C3
Clinton...................................  228A
Coldwater.................................  237A
Collins...................................  296A
Columbia..................................  244A
Columbus..................................  235C2, 276C2, 280C2
Como......................................  278C
Corinth...................................  232C3, 237A
Crenshaw..................................  295A
D'Iberville...............................  250C2
De Kalb...................................  289C2
Decatur...................................  277C3
Drew......................................  237A
Durant....................................  266A
Ellisville................................  273C2
Eupora....................................  241C2
Fayette...................................  249A
Flora.....................................  247C3
Forest....................................  223C
Fulton....................................  270C2
Gluckstadt................................  269C2
Greenville................................  250C2, 264C1, 284C2
Greenwood.................................  230C3, 256C, 282C2
Grenada...................................  222A, 261C2, 267A
Gulfport..................................  244A, 272C3, 296A
Hattiesburg...............................  221A, 226A, 279C, 283C1
Hazlehurst................................  225A
Heidelberg................................  257C2
Holly Springs.............................  224A
Houston...................................  227C
Indianola.................................  245C2, 288A
Iuka......................................  285C2
Jackson...................................  234C, 238C, 242C, 259C, 275C
Kosciusko.................................  286C1
Laurel....................................  251A, 262C
Leland....................................  232C2, 272A
Lexington.................................  273C3
Liberty...................................  299C3
Long Beach................................  233A
Louisville................................  296C3
Lucedale..................................  295A
Lumberton.................................  237C1
Macon.....................................  263A
Magee.....................................  298C
Marion....................................  236C2
McComb....................................  289C1
McLain....................................  245A
Meridian..................................  246C, 267C1, 271A
Monticello................................  271C2
Moss Point................................  285C2
Mound Bayou...............................  271A
Natchez...................................  236C, 247A
New Albany................................  268A, 294C2
New Augusta...............................  269A
Newton....................................  250A
Ocean Springs.............................  223A, 276C2
Olive Brance..............................  239A
Oxford....................................  229C3, 238A, 248C1, 286A
Pascagoula................................  256C1, 290C3
Pearl.....................................  230C3
Petal.....................................  292C3
Philadelphia..............................  272A
Picayune..................................  291C2
Pickens...................................  290C2
Pontotoc..................................  244A
Port Gibson...............................  263A
Potts Camp................................  240A
Prentiss..................................  252A
Quitman...................................  255C3
Redwood...................................  288A
Richtown..................................  243A
Ripley....................................  272A
Rosedale..................................  298C3
Saltillo..................................  275C3
Sardis....................................  271A
Starkville................................  221A, 291C2
State College.............................  283C3
Stonewall.................................  295A
Sumrall...................................  247A
Taylorsville..............................  240C2
Tchula....................................  292C3
Tunica....................................  241C3
Tupelo....................................  253C1
Tylertown.................................  249A, 297A
Union.....................................  281C2
University................................  221A
Utica.....................................  265C2
Vicksburg.................................  254C1, 267C3, 294C
Water Valley..............................  288A
Waynesboro................................  288A
West Point................................  265A
Winona....................................  236C3
Yazoo City................................  221C3, 226A
------------------------------------------------------------------------


                                Missouri
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Arcadia...................................  280A
Ash Grove.................................  281C3
Asbury....................................  278C3
Ashland...................................  791C1
Aurora....................................  263C2
Ava.......................................  221A
Bethany...................................  238C2
Birch Tree................................  296C3
Bismarck..................................  258C3
Bonne Terre...............................  282A
Boonville.................................  226A, 257C2
Bowling Green.............................  231C3
Bourbon...................................  231A
Branson...................................  292C2
Brookfield................................  245C2
Brookline.................................  271A
Buffalo...................................  260C3
Bunker....................................  292A
Butler....................................  221A
Cabool....................................  251A
California................................  232C2
Cameron...................................  261C2

[[Page 96]]

 
Campbell..................................  298C3
Canton....................................  265C2
Cape Girardeau............................  264C, 275B
Carrollton................................  264C1
Carthage..................................  236C2
Caruthersville............................  286A
Centralia.................................  221A
Chaffee...................................  284A
Channel...................................  223A
Charleston................................  291C2
Chillicothe...............................  280C3
Clayton...................................  256C
Clinton...................................  237C3, 241C
Columbia..................................  244C1, 252C2, 268C1, 272A
Crestwood.................................  234C
Cuba......................................  271A, 297C3
De Soto...................................  261A
Deerfield.................................  264C3
Dexter....................................  272A
Dixon.....................................  221A
Doniphan..................................  248C2
Doolittle.................................  283A
East Prairie..............................  287A
Eldon.....................................  224C2, 270A
Eldorado Springs..........................  288A
Ellington.................................  294A
Farmington................................  253C
Fayette...................................  230C3
Florissant................................  246C1
Fulton....................................  263A
Gainesville...............................  259C2
Gallatin..................................  269C3
Garden City...............................  287A
Gideon....................................  280A
Gordonville...............................  257A
Halfway...................................  256C3
Hannibal..................................  225C1
Harrisonville.............................  264C1
Houston...................................  257C2
Huntsville................................  278C2
Ironton...................................  240C3
Jefferson City............................  261C2, 281A, 295C
Joplin....................................  223C1, 273C1
Kansas City...............................  227C, 235C, 243C, 259C,
                                             271C, 277C, 282C
Kennett...................................  255C, 282A
Kimberling City...........................  261C2
Kirksville................................  229C2, 233C1, 299C2, 300C1
Knob Noster...............................  289C2
Lake Ozark................................  274A
Lamar.....................................  260A
La Monte..................................  246C3
Lebanon...................................  279C, 300C2
Lexington.................................  297C
Liberty...................................  293C1
Linn......................................  276A
Louisiana.................................  269A, 271C3
Lutesville................................  281A
Macon.....................................  260C3
Malden....................................  225C2
Malta Bend................................  248C3
Mansfield.................................  240A
Marble Hill...............................  247A
Marshall..................................  275C1
Marshfield................................  284C2
Maryville.................................  246C3
Memphis...................................  263C3
Mexico....................................  239C
Miner.....................................  296A
Moberly...................................  247C3, 284C, 288C2
Monett....................................  240A
Monroe City...............................  298A
Montgomery City...........................  280A
Mount Vernon..............................  294C3
Mountain Grove............................  223A
Mountain View.............................  245C2
Naylor....................................  260A
Neosho....................................  259C3
Nevada....................................  249A
New London................................  290C3
New Madrid................................  293C2
Nixa......................................  290C2
Osage Beach...............................  228C2
Osceola...................................  222A
Otterville................................  299A
Owensville................................  237C2
Ozark.....................................  225C2
Palmyra...................................  250C2
Perryville................................  266A
Piedmont..................................  285C3
Pleasant Hope.............................  238C2
Poplar Bluff..............................  223A, 233C, 238C1, 244A,
                                             278C2
Potosi....................................  249C3
Republic..................................  258A
Richmond..................................  223A
Rolla.....................................  248A, 287C1
Saint Robert..............................  255A
Salem.....................................  225C3
Savannah..................................  224C2
Scott City................................  230C3
Sedalia...................................  221A
Seligman..................................  227C1
Shell Knob................................  249A
Sikeston..................................  250C2
Southwest City............................  262A
Sparta....................................  243C2
Springfield...............................  234C, 247C1, 254C1, 267C
St. Genevieve.............................  289C
St. James.................................  259C3
St. Joseph................................  286C1
St. Louis.................................  222C, 229C1, 242C1, 251C1,
                                             273C, 277C1, 299C
Steelville................................  227C2
Stockton..................................  299A
Sullivan..................................  265A
Tarkio....................................  228C3
Thayer....................................  222A
Trenton...................................  222C3
Troy......................................  264A
Union.....................................  269A
Vandalia..................................  282A
Versailles................................  236C3
Warrenton.................................  260C3
Warsaw....................................  249A, 253A
Washington................................  283A
Waynesville...............................  249A, 250A, 272A
Webb City.................................  250A
West Plains...............................  230C1, 273C2
Wheeling..................................  290A
Willard...................................  286C2
Willow Springs............................  262C2
------------------------------------------------------------------------


                                 Montana
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anaconda..................................  249C3
Baker.....................................  263C1
Belgrade..................................  244C2, 256A
Belt......................................  269A
Big Sky...................................  283A
Billings..................................  227C1, 231C1, 242C1, 246C2,
                                             253C1, 275C1, 279C1, 286A,
                                             298C

[[Page 97]]

 
Boulder...................................  299A
Bozeman...................................  229C1, 236C1, *240C3, 260C1,
                                             *271C2, 278C1
Butte.....................................  223C1, 231C, 238C, *295A
Cascade...................................  285C
Chinook...................................  267C1
Colstrip..................................  258A
Columbia Falls............................  240C
Conrad....................................  229C1
Cut Bank..................................  274C1
Deer Lodge................................  245C1
Dillon....................................  252C3
Dutton....................................  250C
East Helena...............................  281C1
Ennis.....................................  254C2
Eureka....................................  228C3
Fairfield.................................  279C2
Florence..................................  278A
Forsyth...................................  267C
Fort Benton, 239C3........................
Glasgow...................................  228A
Glendive..................................  243C1
Great Falls...............................  225C1, 233C1, 255C1, 262C,
                                             291C1, 297C
Hamilton..................................  242C, 254C1
Hardin....................................  238C
Havre.....................................  223C, 236C
Helena....................................  258C1, 266C, *276C, 287C
Joliet....................................  259C3
Kalispell.................................  246C, 253C, 280C1, 292C
Lewistown.................................  240A
Laurel....................................  269C1
Libby.....................................  269A
Livingston................................  248C1, 264C
Lockwood..................................  294A
Malta.....................................  261A
Manhattan.................................  289A
Miles City................................  223C
Missoula..................................  227C, 235C, 261C1, 273C1,
                                             290A
Outlook...................................  289C
Plentywood................................  261A
Red Lodge.................................  257A
Ronan.....................................  222C
Scobey....................................  239C1
Shelby....................................  244C1
Sidney....................................  226C1, 236C1
Stevensville..............................  283A
Superior..................................  298A
West Yellowstone..........................  225C
Whitefish.................................  286A
Whitehall.................................  274A
Wolf Point................................  224A
------------------------------------------------------------------------


                                Nebraska
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ainsworth.................................  224A
Albion....................................  224C2
Allen.....................................  265A
Alliance..................................  271C1, 290C1
Auburn....................................  288A
Aurora....................................  247C1
Beatrice..................................  225C1
Bennington................................  227C3
Blair.....................................  247C3, 268C3
Bridgeport................................  267C
Broken Bow................................  252A
Central City..............................  262C
Chadron...................................  234C1, 248C1
Columbus..................................  228C1, 266C1
Cozad.....................................  283C1
Crete.....................................  280A
Crookston.................................  241C1
Fairbury..................................  258C1
Falls City................................  267A
Fremont...................................  288A
Gering....................................  280C1
Gordon....................................  238C2
Grand Island..............................  239C1, 243C1, 299C1
Hastings..................................  233C2, 268C
Holdrege..................................  249C1
Humboldt..................................  244A
Imperial..................................  276A
Kearney...................................  255C1, 272C3, 290C
Kimball...................................  261A
Lexington.................................  226C1
Lincoln...................................  236C2, 270C, 274C1, 287A,
                                             292C2, 297C1
McCook....................................  230C2, 241C, 253C2, 287C1
Milford...................................  251C
Nebraska City.............................  249C1
Norfolk...................................  234C1, 294C
North Platte..............................  235C, 246C1, 278C1
O'Neil....................................  275C1
Ogallala..................................  259C1, 293C1
Omaha.....................................  222C, 231C, 241C, 260C,
                                             264C, 283C, 290C2
Orchard...................................  287C1
Ord.......................................  280C3
Plattsmouth...............................  295C3
Sargent...................................  221C1
Scottsbluff...............................  225C, 231C1
Seward....................................  245C1
Sidney....................................  254C1
South Sioux City..........................  296A
Superior..................................  280A
Terrytown.................................  245C1
Wayne.....................................  285A
West Point................................  300C2
Winnebago.................................  289C2
York......................................  285C2
------------------------------------------------------------------------


                                 Nevada
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Amargosa Valley...........................  266A
Battle Mountain...........................  253A
Beatty....................................  262A
Boulder City..............................  288C2
Caliente..................................  233C1
Carlin....................................  244C
Carson City...............................  247C, 251C
Elko......................................  229C2, 233C3, 237C1
Ely.......................................  224C3, 269C3
Fallon....................................  257A, 267C2
Gardnerville-Minden.......................  256A
Hawthorne.................................  228A
Henderson.................................  231C, 238C, 263C
Incline Village...........................  261C2
Indian Springs............................  257C
Las Vegas.................................  222C, 226C, 242C, 246C,
                                             253C, 270C, 278C, 286C2,
                                             293C
Laughlin..................................  228C1
Mesquite..................................  244C, 248C1
Moapa Valley..............................  284A
North Las Vegas...........................  282C
Overton...................................  295C1
Pahrump...................................  236A, 298C
Pioche....................................  255A
Reno......................................  225C, 238C, 271C3, 283C,
                                             289C, 295C

[[Page 98]]

 
Smith.....................................  222C3
Sparks....................................  221A, 265A
Sun Valley................................  229A, 233C3
Tonopah...................................  224A
Wells.....................................  280C1
Wendover..................................  272C
Winnemucca................................  224C3
------------------------------------------------------------------------


                              New Hampshire
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Bedford...................................  243A
Belmont...................................  227A
Berlin....................................  279C
Campton...................................  289A
Claremont.................................  291B
Concord...................................  272A, 288A
Conway....................................  228A, 283A
Dover.....................................  248B
Exeter....................................  296A
Farmington................................  293A
Franklin..................................  231A
Gorham....................................  296A
Hampton...................................  271A
Hanover...................................  222A, 257A
Haverhill.................................  267A
Henniker..................................  256A
Hillsboro.................................  299A
Hinsdale..................................  285A
Jackson...................................  258A
Keene.....................................  279B
Laconia...................................  252A
Lancaster.................................  272C3
Lebanon...................................  263C3
Lisbon....................................  244A
Littleton.................................  292A
Manchester................................  239B, 266B
Meredith..................................  268A
Moultonborough............................  295A
Mount Washington..........................  235C
Nashua....................................  292A
Newport...................................  269A
New London................................  259A
North Conway..............................  279C
Peterborough..............................  221A
Plymouth..................................  261A
Portsmouth................................  262B
Rochester.................................  244A
Somersworth...............................  254A
Walpole...................................  242A
Winchester................................  254A
Wolfeboro.................................  285A
------------------------------------------------------------------------


    Effective Date Note: At 64 FR 50772, Sept. 20, 1999, New Hampshire 
was amended by adding North Conway, channel 279C, effective Oct. 25, 
1999.

                               New Jersey
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Asbury Park...............................  232A
Atlantic City.............................  236B, 245B, 279B, 297B1
Avalon....................................  232A
Belvidere.................................  296A
Blairstown................................  292A
Bridgeton.................................  299B
Camden....................................  295B
Canton....................................  269A
Cape May..................................  272A
Cape May Court House......................  288A
Dover.....................................  288A
Eatontown.................................  292A
Egg Harbor................................  285B1
Franklin..................................  272A
Long Branch...............................  296A
Manahawkin................................  261A, 289B1
Margate City..............................  241A
Millville.................................  247B
New Brunswick.............................  252A
Newark....................................  234B, 262B, 290B1
Newton....................................  279B1
North Cape May............................  294A
Ocean Acres...............................  253A
Ocean City................................  252A, 292A
Paterson..................................  226B
Peterson..................................  274A
Pleasantville.............................  257A
Point Pleasant............................  240A
Princeton.................................  277B
Toms River................................  224A
Trenton...................................  233B, 248B, 268B
Tuckerton.................................  259A
Villas....................................  254A
Vineland..................................  221A
Wildwood..................................  264B
Wildwood Crest............................  226A
Zarephath.................................  256B
------------------------------------------------------------------------


                               New Mexico
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alamogordo................................  232C3, 279A, 287C3, 300A
Albuquerque...............................  222C, 227C, 231C, 242C,
                                             258C, 262C, 267A, 277C,
                                             300C
Angel Fire................................  256C2
Armijo....................................  296C2
Artesia...................................  225C
Aztec.....................................  235C1
Bayard....................................  275C1
Belen.....................................  249C1
Bloomfield................................  283C
Bosque Farms..............................  284C
Carlsbad..................................  221A, 281C1, 291C2
Chama.....................................  255A
Clayton...................................  228A
Cloudcroft................................  244C, 250C1
Clovis....................................  256C1, 260C1, 268C1, 272C3,
                                             298C1
Corrales..................................  236C1
Deming....................................  232A
Espanola..................................  225C2
Eunice....................................  265A
Farmington................................  225C1, 239C1, 245C, 271C
Gallup....................................  229C, 233C, 256C, 268C1,
                                             291C2
Grants....................................  224C2, 264C2, 279C, 288C
Hatch.....................................  266C
Hobbs.....................................  231C1, 239C3, 243A, 275C1
Hurley....................................  288C1
Jal.......................................  279C1
Kirtland..................................  275C
La Luz....................................  224A
Las Cruces................................  258C, 276A, 280A
Las Vegas.................................  244A, 251C, 264C3, 268A,
                                             275A
Lordsburg.................................  250C, 279C3
Los Alamos................................  253C, 294C1, 298C1
Los Lunas.................................  273C, 292C1

[[Page 99]]

 
Lovington.................................  269C3
Maljamar..................................  *254C1, 286C
Mesilla Park..............................  285A
Portales..................................  237A
Questa....................................  279C1
Raton.....................................  229C2, 243A, 249A
Reserve...................................  283C3
Rio Rancho................................  269A
Roswell...................................  235C, 246C1, *258A, 263C1,
                                             284C2, 293C1
Ruidoso...................................  228C3, 268A
Santa Clara...............................  237C1
Santa Fe..................................  234C1, 238C1, 247C, 281C,
                                             286C, 290C
Santa Rosa................................  240A
Silver City...............................  225C2
Socorro...................................  225A
Taos......................................  260, 270C1
Tatum.....................................  296C
Texico....................................  243A
Thoreau...................................  260C
Truth or Consequences.....................  254C
Tucumcari.................................  224A
White Rock................................  266C3
------------------------------------------------------------------------


                                New York
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albany....................................  238B, 265A, 276A, 293B, 299B
Albion....................................  271A
Alfred....................................  270A
Altamont..................................  285A
Amherst...................................  221A
Amsterdam.................................  249A
Arlington.................................  245A
Attica....................................  269A
Auburn....................................  295B
Avon......................................  227A
Babylon...................................  272A
Baldwinsville.............................  221B1
Ballston Spa..............................  272A
Bath......................................  252A, 276A
Bay Shore.................................  276A
Big Flats.................................  249A
Binghamton................................  251B, 256B
Boonville.................................  267A
Briarcliff Manor..........................  296A
Bridgehampton.............................  273A
Bridgeport................................  258A
Brighton..................................  231A
Brockport.................................  288A
Buffalo...................................  225B, 233B, 241B, 245B,
                                             258B, 273B, 277B, 281B,
                                             293B
Calverton-Roanoke.........................  287A
Canajoharie...............................  227A
Canandaigua...............................  272A
Canton....................................  268A
Cape Vincent..............................  234A, 274A
Carthage..................................  276A
Catskill..................................  253A
Center Moriches...........................  241A
Chateaugay................................  234C2
Chenango Bridge...........................  281A
Cherry Valley.............................  270B
Clifton Park..............................  244A
Clyde.....................................  229A
Cobleskill................................  278B
Conklin...................................  263A
Copenhagen................................  294C3
Corinth...................................  228A
Corning...................................  254A, 291B
Cortland..................................  260B
Dansville.................................  230A
Delhi.....................................  248A, 262A
Depew.....................................  229B
Deposit...................................  234A
Deruyter..................................  286B
Dundee....................................  240A
East Hampton..............................  244A
Ellenville................................  257A
Elmira....................................  224A, 232A
Endicott..................................  289B
Endwell...................................  298A
Essex.....................................  267A
Port Plain................................  266A
Frankfort.................................  235B
Fredonia..................................  243A
Fulton....................................  284B
Garden City...............................  224A
Geneva....................................  269A
Glens Falls...............................  240A
Gouverneur................................  237A
Grand Gorge...............................  287A
Hammondsport..............................  252A
Hampton Bays..............................  296A
Hempstead.................................  252A
Henderson.................................  264A
Herkimer..................................  224A
Highland..................................  297A
Homer.....................................  268A
Honeoye Falls.............................  236B
Hoosick Falls.............................  248A
Hornell...................................  221A, 287B
Horseheads................................  265A
Hudson....................................  228A
Hudson Falls..............................  269A, 296A
Hyde Park.................................  249A
Irondequoit...............................  294A
Ithaca....................................  228A, 247B, 279B
Jamestown.................................  227B, 270A
Jeffersonville............................  271A, 291A
Jewett....................................  250A
Kingston..................................  232A
Lake George...............................  256A
Lake Luzerne..............................  234A
Lake Placid...............................  288A
Lake Success..............................  278B
Lakewood..................................  295B1
Liberty...................................  240A
Little Falls..............................  288A
Lowville..................................  257A
Malone....................................  243C3
Manlius...................................  237A
Mechanicville.............................  283A
Mexico....................................  280A
Middletown................................  224A
Minetto...................................  293A
Montauk...................................  235A, 284A
Monticello................................  252A, 259A
Montour Falls.............................  285A
Morristown................................  275A
Mount Kisco...............................  292A
Narrowsburg...............................  275A
New Paltz.................................  277A
New Rochelle..............................  228A
New York..................................  222B, 230B, 238B, 242B,
                                             246B, 250B, 254B, 258B,
                                             266B, 270B, 274B, 282B,
                                             286B, 294B, 298B
Newburgh..................................  276A
Newport Village...........................  259A
Niagara Falls.............................  253B

[[Page 100]]

 
North Syracuse............................  265A
Norwich...................................  237A, 230B
Norwood...................................  241A
Ogdensburg................................  224A, 254A
Old Forge.................................  223A, 231A
Olean.....................................  239B, 268A
Oneonta...................................  276A, 280A
Oneida....................................  292A
Oswego....................................  244A, 288A
Owego.....................................  269A
Palmyra...................................  259A
Patchogue.................................  248B, 291B
Patterson.................................  288A
Peekskill.................................  264B
Phoenix...................................  271A
Plattsburgh...............................  260C, 286C3
Port Henry................................  221C3
Port Jervis...............................  244A
Potsdam...................................  257A
Poughkeepsie..............................  221A, 241A, 268B, 284B
Pulaski...................................  269A
Queensbury................................  289B1
Ravena....................................  233A
Remsen....................................  228A
Rensselaer................................  280A
Riverhead.................................  280A
Rochester.................................  223B, 243B, 250B, 255B,
                                             263B, 267B, 280A, 290A
Rome......................................  240A, 273B
Rosendale.................................  273A
Rotterdam.................................  252A
Sag Harbor................................  221A
Salamanca.................................  252A
Saranac Lake..............................  269A, 292C3
Saugerties................................  225A
Schenectady...............................  258B
Seneca Falls..............................  257A
Sidney....................................  265A
Smithtown.................................  232A
Sodus.....................................  278A
South Bristol Twsp........................  297A
Southampton...............................  225A, 237A
Southhold.................................  269A
Southport.................................  258A
Speculator................................  243A
Star Lake.................................  290B1
Stillwater................................  267A
Sylvan Beach..............................  262A
Syracuse..................................  226B, 233B, 275B, 290A, 300B
Ticonderoga...............................  280A
Troy......................................  222B
Tupper Lake...............................  272A
Utica.....................................  245B, 254B, 264A, 282B, 297B
Vestal....................................  277B1
Walton....................................  221A
Warrensburg...............................  262B1
Waterloo..................................  253A
Watertown.................................  228A, 248C1
Waverly...................................  271A
Webster...................................  274A
Wellsville................................  278A
Westhampton...............................  253A
Westport..................................  273A
Wethersfield Townsh.......................  299B
White Plains..............................  280A
Whitehall.................................  231A
Whitesboro................................  250A
Willsboro.................................  244A
Windsor...................................  294A
Woodstock.................................  261A
Wurtsboro.................................  247A
------------------------------------------------------------------------


                             North Carolina
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ahoskie...................................  257A
Albemarle.................................  265A
Asheboro..................................  222C
Ashville..................................  260C
Atlantic..................................  297C3
Aurora....................................  283A
Banner Elk................................  264A
Bayboro...................................  250C3
Beech Mountain............................  272A
Belhaven..................................  266C2
Biltmore Forest...........................  243A
Black Mountain............................  295C
Burgaw....................................  260C1
Burlington................................  230C, 266C
Buxton....................................  260A, 268A
Calabash..................................  285C3
Carolina Beach............................  294A
Charlotte.................................  236C, 279C, 284C, 300C
Clinton...................................  297C3
Columbia..................................  273C1, 289C1
Concord...................................  250C
Dunn......................................  278C2
Durham....................................  286C, 296A
Eden......................................  233C1
Edenton...................................  261C2
Elizabeth City............................  244A
Elizabethtown.............................  289A
Elkin.....................................  265A
Enfield...................................  297A
Fairbluff.................................  287A
Fairmont..................................  265C2
Farmville.................................  232A
Fayetteville..............................  251C1
Forest City...............................  227C
Franklin..................................  244A
Fuquay-Varina.............................  280C3
Gaston....................................  250A
Gastonia..................................  270C
Goldsboro.................................  245C, 272A
Greensboro................................  246C, 254C
Greenville................................  300C
Grifton...................................  258C2
Hamlet....................................  282A
Harkers Island............................  262C1
Harrisburg................................  224A
Hatteras..................................  233C1, 246C1
Havelock..................................  286C3
Henderson.................................  223C
Hendersonville............................  273C1
Hertford..................................  285C2
Hickory...................................  239C, 275C1
Highlands.................................  283A
High Point................................  238C1, 258C, 262C
Hope Mills................................  283A
Jacksonville..............................  222C2, 254C1, 288C2
Jefferson.................................  291C3
Iniannapolis..............................  259C
Kill Devil Hills..........................  281C1
Kinston...................................  236C, 249A, 275A
Laurinburg................................  243C
Leland....................................  231A
Lenoir....................................  277A
Lexington.................................  231C
Long Beach................................  252C3
Louisburg.................................  273A
Lumberton.................................  239C, 272A
Manteo....................................  252A, 256C2
Morehead City.............................  242C1
Morganton.................................  221A
Moyock....................................  221C3
Murfreesboro..............................  252A
Murphy....................................  274A

[[Page 101]]

 
Nags Head.................................  222C3
Nashville.................................  259A
New Bern..................................  270C1, 293C1
Newport...................................  277C1
Norlina...................................  232A
North Wilkesboro..........................  247C
Ocean Isle Beach..........................  228A
Ocracoke..................................  224C1
Old Fort..................................  282A
Oriental..................................  231C3
Pinetops..................................  238C3
Plymouth..................................  240A
Raleigh...................................  234C, 241C, 268C, 275A
Reidsville................................  271C
Roanoke Rapids............................  272A
Robbins...................................  276A
Robbinsville..............................  240A
Rocky Mount...............................  221A, 253C3, 264C
Rose Hill.................................  284A
Roxboro...................................  244A
St. Pauls.................................  297A, 299A
Salisbury.................................  293C1
Sanford...................................  288A
Semora....................................  294C2
Shallottee................................  279C3, 292A
Shelby....................................  241C
Southern Pines............................  273A, 295C2
Southern Shores...........................  265C2
Southport.................................  298C2
Statesville...............................  245C, 289C
Tarboro...................................  282C1
Thomasville...............................  252A
Topsail Beach.............................  280C3
Wadesboro.................................  228C3
Wallace...................................  232A
Wanchese..................................  237C3
Washington................................  227C, 252A
Waxhaw....................................  291C3
Waynesville...............................  285A
Whiteville................................  256C1
Williamston...............................  279C1
Wilmington................................  247C1, 267C2, 274C1, 283A
Wilson....................................  291C
Windsor...................................  249A, 255A
Winston-Salem.............................  226C, 281C, 298C
Wrightsville Beach........................  229A
------------------------------------------------------------------------


                              North Dakota
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Arthur....................................  244A
Belfield..................................  230C1
Berthold..................................  264C
Beulah....................................  250A
Bismarck..................................  225C, 233C, 243C, 248C,
                                             254C, 268C
Bottineau.................................  270C1
Burlington................................  276C1
Cannon Ball...............................  298C
Carrington................................  252A
Cavalier..................................  286C1
Devils Lake...............................  244C2, 273C1, 278C1
Dickinson.................................  221C3, 256C1
Fargo.....................................  229C, 250C, 270C1, 300C1
Flasher...................................  290C
Gackle....................................  256C
Grafton...................................  265C3
Grand Forks...............................  225C1, 234C1, 298C1
Harwood...................................  264C3
Hazelton..................................  280C
Hettinger.................................  228A
Hope......................................  284A
Jamestown.................................  227C1, 238C1
Kindred...................................  224C3
Langdon...................................  239A
Lisbon....................................  291C2
Mandan....................................  284C1
Mayville..................................  288C3
Medina....................................  222C
Minot.....................................  229C1, 246C, 260C1, 287C1,
                                             295C2
New England...............................  239C
Richardton................................  270C
Rugby.....................................  237A
Sarles....................................  290C
Tioga.....................................  281C1
Valley City...............................  266C2
Velva.....................................  235C1
Wahpeton..................................  295C2
Walhalla..................................  294C2
Williston.................................  241C1, 253C1, 266C1
Wimbledon.................................  276C1
Wishek....................................  262C1
------------------------------------------------------------------------


                                  Ohio
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ada.......................................  235A
Akron.....................................  243B, 248B
Alliance..................................  223B
Archbold..................................  241A
Ashland...................................  267B
Ashtabula.................................  246B, 252A
Athens....................................  240A, 288A
Barnesville...............................  228A
Beavercreek...............................  280A
Bellaire..................................  263A
Bellefontaine.............................  252A
Bellevue..................................  221A
Belpre....................................  296A
Bowling Green.............................  228A
Bryan.....................................  265A
Bucyrus...................................  224A
Byesville.................................  249A
Cadiz.....................................  292A
Caldwell..................................  285A
Cambridge.................................  244A
Canton....................................  231B, 251B, 295B
Castalia..................................  249A
Celina....................................  232A, 244A
Chillicothe...............................  227B, 232B1
Cincinnati................................  223B, 227B, 231B, 253B,
                                             270B, 274B, 286B
Circleville...............................  296A
Cleveland.................................  226B, 238B, 253B, 258B,
                                             264B, 271B, 277B, 281B,
                                             289B, 293B 300B
Cleveland Heights.........................  222B
Clyde.....................................  265A
Coal Grove................................  246A
Columbus..................................  222B, 234B, 242B, 246B,
                                             250B, 259B, 298A
Conneaut..................................  288A
Coshocton.................................  257A
Crestline.................................  254A
Crooksville...............................  297A
Dayton....................................  256B, 284B, 299B
Defiance..................................  251B, 290A
Delaware..................................  300A
Delphos...................................  296A
Delta.....................................  293A

[[Page 102]]

 
Dover.....................................  269A
East Liverpool............................  282B
Eaton.....................................  225B
Edgewood..................................  273A
Elyria....................................  297B
Englewood.................................  233A
Fairfield.................................  235B
Findlay...................................  263B
Fort Shawnee..............................  298A
Fostoria..................................  244A
Fredericktown.............................  252A
Fremont...................................  256B1
Gahanna...................................  285A
Galion....................................  272A
Gallipolis................................  268B
Geneva....................................  284A
Georgetown................................  249A
Gibsonburg................................  239A
Greenfield................................  248A
Greenville................................  293B
Grove City................................  266A
Hamilton..................................  243B, 278B
Harrison..................................  282A
Hicksville................................  294A
Hillsboro.................................  294B
Holland...................................  272A
Hubbard...................................  270A
Huron.....................................  241A
Ironton...................................  296A
Jackson...................................  249A
Johnstown.................................  276A
Kent......................................  261A
Kenton....................................  237A
Kettering.................................  260B
Lancaster.................................  238B, 278A
Lebanon...................................  247A
Lima......................................  226A, 249A, 271B, 285A
Logan.....................................  252A
London....................................  292A
Lorain....................................  285A
Loudonville...............................  299A
Manchester................................  267A
Mansfield.................................  287B, 291B
Marietta..................................  271B1
Marion....................................  232A, 295B
Marysville................................  289A
McArthur..................................  254A
McConnelsville............................  265A
Medina....................................  235B
Miamisburg................................  229B
Middleport................................  221A
Middletown................................  290B
Milford...................................  296A
Millersburg...............................  237A
Montpelier................................  283A
Mount Gilead..............................  236
Mount Vernon..............................  229B
Napoleon..................................  276A
Nelsonville...............................  299A
New Lexington.............................  290A
New Philadelphia..........................  240A
Newark....................................  262B, 269A
Niles.....................................  291A
North Baltimore...........................  299A
North Kingsville..........................  298A
North Madison.............................  229A
Norwalk...................................  237A
Oak Harbor................................  247A
Ottawa....................................  292A
Oxford....................................  249A
Paulding..................................  259A
Piketon...................................  261A
Piqua.....................................  239B
Pleasant City.............................  221A
Port Clinton..............................  233B
Portsmouth................................  257A, 281C, 298A
Richwood..................................  282A
Ripley....................................  258C3
St. Marys.................................  277A
Salem.....................................  286B
Sandusky..................................  274B
Shadyside.................................  239B1
Shelby....................................  261A
Sidney....................................  288A
South Webster.............................  235A
South Zanesville..........................  224B1
Springfield...............................  264B, 275B
Steubenville..............................  278B
Swanton...................................  297A
Sylvania..................................  288A
Tiffin....................................  279B
Toledo....................................  223B, 260B, 268B, 284B
Troy......................................  245A
Uhrichsville..............................  260A
Union City................................  248A
Upper Arlington...........................  255A
Upper Sandusky............................  240A
Urbana....................................  269A
Van Wert..................................  230A, 255B
Wapakoneta................................  221A
Washington Courthouse.....................  288A
Wauseon...................................  245A
Waverly...................................  265A
Wellston..................................  244B1
West Carrollton...........................  221A
West Union................................  276A
Westerville...............................  280A
Willard...................................  245A
Wilmington................................  272A
Wooster...................................  283B
Xenia.....................................  237A
Youngstown................................  227B, 255B, 266B
Zanesville................................  273B
------------------------------------------------------------------------


                                Oklahoma
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ada.......................................  257A
Altus.....................................  228C2, 300C3
Alva......................................  259C1, 278C1, 289C2
Anadarko..................................  279C1
Antlers...................................  222C2, 284A
Ardmore...................................  239C1, 253A
Atoka.....................................  276C2
Bartlesville..............................  261C1
Bethany...................................  285A
Bixby.....................................  287C2
Blossom...................................  224C2
Bristow...................................  285A
Broken Arrow..............................  221C2
Broken Bow................................  291C2
Byng......................................  261C2
Chelsea...................................  264A
Chickasha.................................  288A
Clinton...................................  238C2, 294C1
Coalgate..................................  288C2
Collinsville..............................  268C3
Comanche..................................  246A
Cordell...................................  229A, 257C3
DeQueen...................................  227A
Dickson...................................  278C3

[[Page 103]]

 
Duncan....................................  272A
Durant....................................  248C2, 296C3
Edmond....................................  250A
Eldorado..................................  246A
Elk City..................................  232C3, 243C1, 253C
Enid......................................  245C, 276C2
Eufaula...................................  273C3
Frederick.................................  240A
Grove.....................................  257A
Guymon....................................  224C3, 258C1
Healdton..................................  249C3
Heavener..................................  223A
Henryetta.................................  258C1
Hobart....................................  290C
Holdenville...............................  293C3
Hollis....................................  223A
Hugo......................................  238C2
Idabel....................................  244C3, 275A
Ketchum...................................  298C1
Kingfisher................................  287A
Lahoma....................................  239C3
Lawton....................................  231C, 237C3, 251C1, 258C3,
                                             267C1, 297C2
Lindsay...................................  286A
Locust Grove..............................  233A
Lone Grove................................  294A
Mangum....................................  249A
Marlow....................................  221C1
McAlester.................................  267C1, 286A
Miami.....................................  265A
Muskogee..................................  246C, 295C
Newcastle.................................  227C1
Norman....................................  292A
Nowata....................................  285A
Okarche...................................  294C2
Oklahoma City.............................  223C, 234C, 241C, 255C,
                                             263C, 270C, 274C, 281C,
                                             299C
Okmulgee..................................  231C1
Owosso....................................  291C
Pawhuska..................................  280A
Perry.....................................  286A
Ponca City................................  257A, 265A, 284A
Poteau....................................  250C, 297C
Pryor.....................................  283C1
Roland....................................  222A
Sallisaw..................................  240C2
Sand Springs..............................  272C2
Sapulpa...................................  265A
Seminole..................................  290A
Shawnee...................................  236C
Snyder....................................  262A
Soper.....................................  243A
Spencer...................................  289A
Stillwater................................  229C2, 251A, 288A
Sulphur...................................  291A
Taft......................................  262A
Tahlequah.................................  269C3
Tishomingo................................  259C3
Tulsa.....................................  225C, 238C, 243C, 248C,
                                             253C, 277C
Vinita....................................  240A, 241C2
Warner....................................  271A
Watonga...................................  230A
Weatherford...............................  247C1
Wewoka....................................  284A
Wilburton.................................  279C1
Woodward..................................  221C3, 240A, 261C1, 266C,
                                             272A
Wynnewood.................................  283A
------------------------------------------------------------------------


                                 Oregon
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albany....................................  260C, 300C
Altamont..................................  249C1, 267C1
Ashland...................................  270C, 298C2
Astoria...................................  225C1
Baker.....................................  237A, 284C
Bandon....................................  243C3
Banks.....................................  298C1, 298C3
Bay City..................................  242A
Beaverton.................................  277C
Bend......................................  231C, 248C1, 252C3, 259A,
                                             264C1, 289C1
Bonanza...................................  275C3
Brookings.................................  237C2
Brownsville...............................  272C1
Burns.....................................  224A
Cannon Beach..............................  235C3
Canyon City...............................  233C
Cave Junction.............................  274C
Condon....................................  228A
Coos Bay..................................  228A, 254C2, 290C2
Coquille..................................  247C1
Corvallis.................................  268C1, 292C
Cottage Grove.............................  263A, 288A
Creswell..................................  237C3
Dallas....................................  252C3
Depoe Bay.................................  288A
Eagle Point...............................  292C3
Elgin.....................................  290A
Enterprise................................  221A
Eugene....................................  233C, 241C, 250C, 256C
Florence..................................  284C, 295A
Gleneden Beach............................  248C2
Gold Beach................................  224C1
Gold Hill.................................  262C1
Grants Pass...............................  245C
Harbeck-Fruitdale.........................  252C2
Hermiston.................................  263A
Hood River................................  288A
Keno......................................  253A
Klamath Falls.............................  223C, 258C1, 284C1, 295C1
La Grande.................................  254C2, 260C1
Lake Oswego...............................  294C
Lakeview..................................  228C2, 237C2
Lebanon...................................  279C
Lincoln City..............................  236C2, 244C2
Malin.....................................  263A
Medford...................................  229C, 239C1, 278C1
Merrill...................................  289A
Milton-Freewater..........................  250C2
Myrtle Point..............................  231A
Newport...................................  224C2, 274C1
North Bend................................  235C1, 297C1
Nyssa.....................................  254C1
Oakridge..................................  221A
Ontario...................................  241C1
Pendleton.................................  279C1, 299C
Phoenix...................................  286C1
Portland..................................  222C, 229C, 238C, 246C,
                                             254C1, 258C1, 262C, 266C,
                                             270C
Prineville................................  236C1, 254C3
Ranier....................................  252A
Redmond...................................  269C2, 275C1, 298C1
Reed City.................................  247A
Reedsport.................................  221A, 258C3
Rogue River...............................  234A
Roseburg..................................  276A
Salem.....................................  286C
Seaside...................................  251A, 272C3
Sisters...................................  281C1
Springfield-Eugene........................  226C
Sunriver..................................  224C2
Sutherlin.................................  266C3

[[Page 104]]

 
Sweet Home................................  296C1
The Dalles................................  224C3, 244C3, 249C2, *268C3,
                                             283C
Tillamook.................................  231C3, 281C3
Toledo....................................  264C2
Tri-City..................................  282C2
Warm Springs..............................  243C
Weston....................................  270C2
------------------------------------------------------------------------


                              Pennsylvania
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Allentown.................................  264B, 281B
Altoona...................................  251B, 261B1
Avis......................................  260A
Barnesboro................................  228A
Beaver Falls..............................  294B
Beaver Springs............................  291A
Bedford...................................  265A, 298A
Bellefonte................................  237A
Bellwood..................................  280A
Benton....................................  240A
Berwick...................................  278A
Bethlehem.................................  236B
Blairsville...............................  292A
Bloomsburg................................  293B
Boalsburg.................................  229A
Boyertown.................................  298B
Braddock..................................  245B
Bradford..................................  261A
Brookville................................  277B1, 288B1
Burnham...................................  244A
Butler....................................  249A
Cambridge Springs.........................  283A
Canton....................................  262B1
Carbondale................................  232A
Carlisle..................................  272A
Central City..............................  269A
Chambersburg..............................  236B
Charleroi.................................  252A
Clarendon.................................  274A, 282A
Clarion...................................  224A
Clearfield................................  226B1
Cooperstown...............................  299A
Coudersport...............................  244A
Covington.................................  268A
Cresson...................................  232A
Curwensville..............................  275A
Dallas....................................  229A
Danville..................................  244A
Dubois....................................  271B, 297B
Easton....................................  241B, 260B
Ebensburg.................................  256B
Edinboro..................................  250B1
Elizabethville............................  263A
Ellwood City..............................  221A
Emporium..................................  257A
Ephrata...................................  286B
Erie......................................  234A, 260B, 272A, 279B
Everett...................................  282A
Fairview..................................  230A
Forest City...............................  261A
Franklin..................................  257B1
Freeland..................................  276A
Galeton...................................  264B1
Gettysburg................................  299B
Greencastle...............................  232A
Greensburg................................  296A
Greenville................................  296A
Grove City................................  236B
Harrisburg................................  235B, 247B, 257A, 281B
Hawley....................................  287A
Hazleton..................................  250B
Hershey...................................  294B
Hollidaysburg.............................  285A
Honesdale.................................  237A
Huntingdon................................  278A, 292A
Indiana...................................  223A
Jenkintown................................  280A
Jersey Shore..............................  242B1, 249A
Johnsonburg...............................  263A
Johnstown.................................  221A, 238B, 243B
Kane......................................  280A
Lancaster.................................  233B, 245B, 267B
Laporte...................................  280A
Lebanon...................................  261A
Lewisburg.................................  279A
Lewistown.................................  239A, 288A
Liberty...................................  298A
Linesville................................  269A
Lock Haven................................  221A
Mansfield.................................  222A
Martinsburg...............................  224A
Masontown.................................  295A
McConnellsburg............................  279A
Meadville.................................  262B
Mechanicsburg.............................  228A
Media.....................................  262B
Mercer....................................  244A, 280A
Mercersburg...............................  221A
Mexico....................................  223A
Meyersdale................................  227A, 253A
Mifflinburg...............................  252A
Mifflintown...............................  296A
Mill Hall.................................  254A
Millersburg...............................  255A
Milton....................................  265A
Montrose..................................  243B
Mountaintop...............................  246A
Mount Carmel..............................  259A
Mount Union...............................  258A
Muncy.....................................  227B1
Nanticoke.................................  221A
New Kensington............................  264B
North East................................  265B1
Northumberland............................  297A
Oil City..................................  242A, 253B1
Oliver....................................  235B1
Olyphant..................................  239A
Palmyra...................................  221A
Patton....................................  234A
Philadelphia..............................  223B, 227B, 231B, 239B,
                                             243B, 251B, 255B, 266B,
                                             271B, 275B, 283B, 287B,
                                             291B
Philipsburg...............................  290A
Pittsburgh................................  225B, 229B, 233B, 241B,
                                             259B, 268B, 273B, 284B,
                                             290B, 300B
Pittston..................................  272A
Pocono Pines..............................  290A
Port Allegany.............................  235A
Port Matilda..............................  300A
Portage...................................  289A
Pottsville................................  270B
Punxsutawney..............................  281A
Reading...................................  273B
Red Lion..................................  241B
Renovo....................................  295A
Reynoldsville.............................  293A
Ridgebury.................................  245A
Riverside.................................  222A
Russell...................................  276A
Saegertown................................  232A

[[Page 105]]

 
Salladsburg...............................  238A
Scottdale.................................  280A
Scranton..................................  258, 267B, 285A, 295A
Shamokin..................................  237A
Sharon....................................  275B
Sharpsville...............................  240A
Smethport.................................  292A
Somerset..................................  249A
South Waverly.............................  241A
South Williamsport........................  257A
Spangler..................................  247A
St. Marys.................................  230B1, 248B
Starview..................................  224A
State College.............................  233A, 276A
Stroudsburg...............................  228A
Sunbury...................................  231B
Susquehanna...............................  223A
Tamaqua...................................  288A
Tioga.....................................  234B1
Tobyhanna.................................  300A
Towanda...................................  237A
Tunkhannock...............................  299A
Tyrone....................................  266B
Union City................................  292A
Uniontown.................................  257A
University Park...........................  246A
Warren....................................  222B
Washington................................  237A
Waynesboro................................  268B
Waynesburg................................  276A
Wellsboro.................................  283B
Whitneyville..............................  296A
Wilkes-Barre..............................  225B, 253B
Williamsport..............................  274B, 286B, 300A
York......................................  277B, 289B
York-Hanover..............................  253B
------------------------------------------------------------------------


    Effective Date Note: At 64 FR 50011, Sept. 15, 1999, Oregon was 
amended by adding Elgin, channel 290A, effective Oct. 18, 1999.

                              Rhode Island
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Block Island..............................  257A
Middletown................................  262A
Narragansett Pier.........................  274A
Providence................................  222B, 231B, 238B, 268B, 286B
Wakefield-Peacedale.......................  259A
Westerly..................................  279B
Woonsocket................................  292A
------------------------------------------------------------------------


                             South Carolina
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abbeville.................................  225A
Aiken.....................................  242C2, 258C2
Allendale.................................  228A
Anderson..................................  266C, 297C
Andrews...................................  264A
Atlantic Beach............................  262A
Bamberg...................................  239A
Barnwell..................................  256C3
Batesburg.................................  226A
Beaufort..................................  254C1
Bishopville...............................  229A
Blackville................................  250A
Bluffton..................................  295C1
Bowman....................................  233A
Branchville...............................  286A
Briarcliffe Acres.........................  296C2
Bucksport.................................  300C2
Camden....................................  274A
Cayce.....................................  244A
Charleston................................  236C, 245C, 263C3, 278C1
Cheraw....................................  277C2
Chester...................................  257C3
Chesterfield..............................  297A
Clearwater................................  252A
Clemson...................................  285A
Columbia..................................  228A, 248C1, 276A, 284C
Conway....................................  230A
Cross Hill................................  231A
Darlington................................  288C3
Dillon....................................  225C
Easley....................................  280A
Elloree...................................  262A, 262C3
Florence..................................  292A
Folly Beach...............................  251C2
Forest Acres..............................  232A
Gaffney...................................  287C
Garden City...............................  249C1
Georgetown................................  229A, 293C2
Goose Creek...............................  232C3
Gray Court................................  263C
Greenville................................  223C, 229C, 233C
Greenwood.................................  244A, 278C3
Greer.....................................  277A
Hampton...................................  221A
Hanahan...................................  241C1
Hardeeville...............................  266C2
Hartsville................................  253A
Hilton Head Island........................  291C2, 300C2
Honea Path................................  276A
Johnsonville..............................  286A
Johnston..................................  224A
Kingstree.................................  231A, 257C3
Ladson....................................  292A
Lake City.................................  261A
Lancaster.................................  296A
Latta.....................................  232C3
Lexington.................................  253A
Loris.....................................  235A
Manning...................................  223C
Marion....................................  263C3
McClellanville............................  255C2
Moncks Corner.............................  287C3
Mount Pleasant............................  283C2
Mullens...................................  ............................
Murrell's Inlet...........................  233A
Myrtle Beach..............................  221C2, 269C2, 281C1
New Ellenton..............................  274A
Newberry..................................  292C3
North Charleston..........................  273C
North Myrtle Beach........................  290C3
Orangeburg................................  275A, 280C3, 294C1
Pageland..................................  272A
Pamplico..................................  271C2
Parris Island.............................  276C3
Pawley's Island...........................  253A
Port Royal................................  259C
Ravenel...................................  269C3
Ridgeland.................................  285C3
Ridgeville................................  265C3
St. Andrews...............................  272A
St. George................................  298C
St. Matthews..............................  230A
St. Stephen...............................  291A
Saluda....................................  221A
Scranton..................................  275A

[[Page 106]]

 
Seneca....................................  251C
Socastee..................................  258C3
South Congaree............................  237A
Spartanburg...............................  255C
Summerton.................................  252A
Summerville...............................  227C2
Sumter....................................  234A, 267C
Surfside Beach............................  276C3
Walhalla..................................  242A
Walterboro................................  229A
Wedgefield................................  238A
West Columbia.............................  261A
Williston.................................  234A
------------------------------------------------------------------------


                              South Dakota
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aberdeen..................................  231C1, 235C, 294C1
Belle Fourche.............................  240C1, 271C3
Brandon...................................  261A
Brookings.................................  229C1
Canton....................................  274C2
Clear Lake................................  296C3
Custer....................................  286C2
Deadwood..................................  236C
Dell Rapids...............................  239C3
Faith.....................................  246C
Flandreau.................................  300C3
Gregory...................................  268C1
Hot Springs...............................  244C2
Huron.....................................  256A, 286A
Ipswich...................................  300A
Lead......................................  232C
Lennox....................................  256C3
Lowry.....................................  264C1
Madison...................................  276C2
Martin....................................  273C1
Milbank...................................  282C1
Mission...................................  264A
Mitchell..................................  290C1, 297C1
Mobridge..................................  258C1
Murdo.....................................  285A
Pierre....................................  224C1, 237C2
Pine Ridge................................  228A
Presho....................................  262A
Rapid City................................  222C, 230C1, 250C1, 254C1,
                                             262C1, 281C1, 292C
Redfield..................................  249A, 279C1
Reliance..................................  233C
Roscoe....................................  287A
Salem.....................................  263C1
Sioux Falls...............................  223C, 233A, 243C, 247C1,
                                             270C2, 279C2, 284C
Sisseton..................................  258C2, 275C1
Spearfish.................................  266C, 297C
Sturgis...................................  226C
Vermillion................................  292C2
Volga.....................................  272C3
Watertown.................................  225C1, 241C1, 245C
Wessington Springs........................  227C1, 252C1
Winner....................................  229C1
Yankton...................................  226C1, 281C1
------------------------------------------------------------------------


                                Tennessee
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alamo.....................................  226C3
Athens....................................  269C3
Atwood....................................  229A
Baxter....................................  299C3
Belle Meade...............................  294A
Benton....................................  226A
Bolivar...................................  244A
Bristol...................................  245C
Brownsville...............................  237A
Bulls Gap.................................  264A
Byrdstown.................................  244A
Calhoun...................................  281A
Camden....................................  240A
Carthage..................................  281A
Celina....................................  268A
Centerville...............................  244A
Chattanooga...............................  222C, 243C, 293C
Cleveland.................................  237A, 264C
Clifton...................................  293A
Clinton...................................  237A
Coalmont..................................  284A
Collinwood................................  235C3
Colonial Heights..........................  240C2
Columbia..................................  269A
Cookeville................................  234C, 253C2
Covington.................................  228A
Crossville................................  257A, 273C3
Dayton....................................  285A
Dickson...................................  273C1
Dresden...................................  236A
Dyer......................................  232A
Dyersburg.................................  261C2
East Ridge................................  300C3
Elizabethton..............................  257C3
Erwin.....................................  280A
Etowah....................................  276C2
Fayetteville..............................  288A
Franklin..................................  261A
Gallatin..................................  283C1
Gatlinburg................................  288A
Germantown................................  231C2, 298C3
Goddlettsville............................  246C2
Graysville................................  239A
Greensville...............................  235C
Harriman..................................  224A
Harrogate.................................  243A
Henderson.................................  239A, 299C3
Hendersonville............................  221A
Humboldt..................................  272A, 287A
Huntingdon................................  265C3
Jackson...................................  268A, 276C2, 281C1
Jamestown.................................  280A, 286A
Jefferson City............................  257A
Jellico...................................  274A
Johnson City..............................  268C
Karns.....................................  226A
Kingsport.................................  253C, 285A
Kingston Springs..........................  229A
Knoxville.................................  248C, 278C, 283A, 299C
Lafayette.................................  271A
La Follette...............................  285A
Lawrenceburg..............................  240A, 248A
Lebanon...................................  255A, 298C
Lenoir City...............................  228A
Lewisburg.................................  232A
Lexington.................................  257A
Livingston................................  240C2
Lobelville................................  233C2
Loudon....................................  256A, 287A
Madisonville..............................  258A
Manchester................................  259C
Martin....................................  269A
Maryville.................................  239A
McKenzie..................................  295C1

[[Page 107]]

 
McKinnon..................................  268A
McMinnville...............................  280A
Memphis...................................  246C1, 259C, 266C1, 274C1,
                                             283C1, 290C
Middleton.................................  264C3
Milan.....................................  222C
Millington................................  251C
Minor Hill................................  221A
Monterey..................................  226A, 284A, 295C2
Morristown................................  231A
Murfreesboro..............................  242C1
Nashville.................................  225C, 238C, 250C, 277C, 290C
Newport...................................  225A
Norris....................................  294A
Oak Ridge.................................  232A, 262C
Oliver Springs............................  254C3
Oneida....................................  288A
Paris.....................................  231C3
Parsons...................................  247A
Pulaski...................................  252A
Red Bank..................................  232A
Ripley....................................  235A
Rockwood..................................  289A
Rogersville...............................  293A
St. Joseph................................  268A
Savannah..................................  228A, 269A
Selmer....................................  230A, 288A
Sevierville...............................  271C1
Seymour...................................  242A
Shelbyville...............................  275C1
Signal Mountain...........................  251A
Smithville................................  269A
Smyrna....................................  231A
Soddy-Daisy...............................  272A
South Pittsburg...........................  247C2
Sparta....................................  288A
Spencer...................................  297A
Spring City...............................  230C3
Springfield...............................  232A
Surgoinsville.............................  282A
Sweetwater................................  252A
Tazewell..................................  290A
Tiptonville...............................  267C3
Trenton...................................  248C3
Tullahoma.................................  227C
Tusculum..................................  276A
Union City................................  285A, 289A
Wartburg..................................  267C3
Waverly...................................  286C2
Woodbury..................................  285A
------------------------------------------------------------------------


                                  Texas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abilene...................................  223C2, 263C, 286C1, 292C2,
                                             300C1
Alamo.....................................  285A
Alice.....................................  221A, 272A
Alpine....................................  224A
Amarillo..................................  226C1, 231C, 245C1, 250C,
                                             254C1, 259A, 265C1, 270C1,
                                             275C1, 289C3
Andrews...................................  288A
Anson.....................................  251C2
Archer City...............................  248C2
Arlington.................................  235C
Atlanta...................................  261C2
Austin....................................  229C, 238C1, 251C1, 264C,
                                             272C2
Azle......................................  269C
Baird.....................................  236C3
Ballinger.................................  276C1
Bandera...................................  252A
Bastrop...................................  296C2
Bay City..................................  269C1, 273C1
Beaumont..................................  231C1, 236C1, 248C1, 273C2,
                                             300C
Beeville..................................  250C2, 289C3
Bells.....................................  226A
Belton....................................  292C3
Benavides.................................  299C2
Big Lake..................................  252A, 280A
Big Spring................................  240C3, 232C3
Bishop....................................  295C3
Bloomington...............................  295C3
Blossom...................................  224C2
Bonham....................................  252C3
Borger....................................  282C1, 294A
Brackettville.............................  234A
Brady.....................................  237A
Breckenridge..............................  228C2
Brenham...................................  231C3, 291C2
Bridgeport................................  252A
Brownfield................................  282C2
Brownsville...............................  258C, 262C
Brownwood.................................  257C2, 268C1, 281C1
Bryan.....................................  252A, 258A, 284C2
Buda......................................  268C1
Burkburnett...............................  284C
Burnet....................................  223A, 295A
Caldwell..................................  297A
Cameron...................................  232A, 280C2
Campwood..................................  256A
Canadian..................................  235C1
Canyon....................................  296A, 300C1
Carrizo Springs...........................  221A, 228A
Carthage..................................  255C1, 282A
Center....................................  263A
Centerville...............................  290C3
Childress.................................  241C2
Claude....................................  239C1
Clarksville...............................  253C
Cleveland.................................  246C
Clifton...................................  277C3
Coahoma...................................  288A
Coalgate..................................  288C2
Coleman...................................  296C3
College Station...........................  263C2
Colorado City.............................  291A
Columbus..................................  252A
Comanche..................................  232C2
Comfort...................................  236C2
Commerce..................................  277C3
Conroe....................................  295C
Copperas Cove.............................  276C3
Corpus Christi............................  230C1, 234C3, 238C, 243C1,
                                             256C1
Corrigan..................................  232A
Cotulla...................................  249A
Crane.....................................  267C1
Crockett..................................  224C2, 228C2
Crystal Beach.............................  268C3
Crystal City..............................  232A
Cuero.....................................  249C3
Dalhart...................................  240A
Dallas....................................  223C, 250C, 254C, 262C,
                                             266C, 275C, 283C, 287C
Decatur...................................  289C
Del Rio...................................  232A, 242C1
Denton....................................  256C, 291C
Denver City...............................  248C2
DeQueen...................................  227A
Detroit...................................  294C2
Devine....................................  223C2
Diboll....................................  238C1
Dilley....................................  255C2

[[Page 108]]

 
Dimmitt...................................  263C3
Dublin....................................  226C3
Dumas.....................................  237C3
Eagle Pass................................  224A
Eastland..................................  249A
Eden......................................  283A
Edinburg..................................  281C, 300C1
Edna......................................  241C3
El Campo..................................  245C1
El Paso...................................  222C, 226C, 230C, 234C,
                                             238C, 242C, 248C, 260C,
                                             271C
Electra...................................  235C2
Elgin.....................................  223A
Fabens....................................  276A
Fairfield.................................  256C3
Falfurrias................................  292A
Farmersville..............................  221A
Farwell...................................  222C1, 252C2
Floresville...............................  231C2
Flower Mound..............................  244C
Floydada..................................  237A
Fort Stockton.............................  232A
Fort Worth................................  231C, 242C, 258C, 298C1
Fort Worth-Dallas.........................  246C, 271C
Franklin..................................  270C3
Frankston.................................  244C2
Fredericksburg............................  266C
Freeport..................................  277C
Freer.....................................  240A
Friona....................................  234C2
Gainesville...............................  233C, 300C1
Galveston.................................  285A, 293C
Ganado....................................  284C2
Gatesville................................  252A
George West...............................  228C3, 281A
Georgetown................................  244C1, 299C3
Gilmer....................................  237C3
Glen Rose.................................  221C1
Goldsmith.................................  234A
Goliad....................................  240C3
Gonzales..................................  292C3
Graham....................................  296C3
Granbury..................................  294C
Greenville................................  228C3
Gregory...................................  283A
Groves....................................  223C2
Groveton..................................  251A
Haltom City...............................  227C2
Hamlin....................................  279C
Harker Heights............................  288C2
Harlingen.................................  233C, 241C
Haskell...................................  238C
Hearne....................................  276A
Hebbronville..............................  269A
Hemphill..................................  280A
Hempstead.................................  287C3
Hereford..................................  278C2, 292C2
Higland Park-Dallas.......................  279C
Highland Village..........................  264C
Hillsboro.................................  273C1
Hondo.....................................  253A
Hooks.....................................  240C3
Houston...................................  229C, 233C, 239C, 243C,
                                             250C, 256C, 262C, 266C,
                                             271C, 275C, 281C, 289C
Howe......................................  237C3
Hudson....................................  242A
Huntington................................  270C2
Huntsville................................  259C3, 269A
Hutto.....................................  221A
Idalou....................................  289A, 299A
Ingleside.................................  297C3
Jacksboro.................................  237A
Jacksonville..............................  272C2, 293C
Jasper....................................  274C2, 297A
Jefferson.................................  283A
Johnson City..............................  300C2
Jourdanton................................  239C3
Junction..................................  228A
Karnes City...............................  276C2
Kennedy...................................  221A
Kermit....................................  292A
Kerrville.................................  222C2, 232C2, 291A
Kilgore...................................  241C2
Killeen...................................  222A, 227C
Kingsville................................  224C2, 248C1
Knox City.................................  297A
Krum......................................  229C3
La Grange.................................  285A
Lake Jackson..............................  298C
Lamesa....................................  284C1
Lampasas..................................  255C1
Laredo....................................  224A, 235C1, 251C1, 291A
Leakey....................................  282A, 226A
Lewisville................................  300C1
Levelland.................................  288A
Liberty...................................  260C2
Linden....................................  257C2
Littlefield...............................  238C3
Livingston................................  222C2
Llano.....................................  242A, 275A, 293A
Lometa....................................  270A
Longview..................................  247C2, 289C
Lorenzo...................................  251C2
Los Ybanez................................  253C2
Lovelady..................................  282C3
Lubbock...................................  229C1, 233C1, 242C1, 258C1,
                                             266C1, 273C1, 293C2
Lufkin....................................  230A, 257C2, 261A, 286C
Luling....................................  234C
Madisonville..............................  241C2, 263C3
Malakoff..................................  240A
Marfa.....................................  228A
Markham...................................  223A
Marlin....................................  225C2
Marshall..................................  222A, 280A
Mason.....................................  249C2, 224A
McAllen...................................  245C, 253C
Mc Camey..................................  237A
McKinney..................................  295A
Memphis...................................  287C1
Mercedes..................................  292A
Meridian..................................  285A
Merkel....................................  274C1
Mexia.....................................  285A
Midland...................................  222C, 227C1, 236C3, 277C1,
                                             294C1
Mineola...................................  260A
Mineral Wells.............................  240C1
Mirando City..............................  263C2
Mission...................................  288A
Monahans..................................  260C1, 271C
Mt. Enterprise............................  260A
Muenster..................................  293A
Muleshoe..................................  276A
Nacogdoches...............................  221A, 277C1
Navasota..................................  223A
New Boston................................  236C2, 278C2, 286A
New Braunfels.............................  221A
New Ulm...................................  222A
Nolanville................................  297A
Odem......................................  252C2
Odessa....................................  241C2, 245C1, 250C1, 256C1,
                                             300C1
Olney.....................................  282C2

[[Page 109]]

 
Orange....................................  283C1, 291C
Ore City..................................  295C3
Overton...................................  264C3
Ozona.....................................  232A
Palacios..................................  259A
Palestine.................................  252C2
Pampa.....................................  262C2
Paris.....................................  230C2, 270C2, 299C2
Pasadena..................................  225C
Pearsall..................................  237A, 281A
Pecos.....................................  247C1, 252A
Perryton..................................  240A
Pilot Point...............................  285C2
Pittsburg.................................  245A, 276C3
Plainview.................................  247C1, 280C1, 295C2
Pleasanton................................  252A
Point Comfort.............................  231C3
Port Arthur...............................  227C, 253C
Port Isabel...............................  266A
Port Lavaca...............................  227C1
Portland..................................  288A
Post......................................  297C2
Premont...................................  264C3
Quanah....................................  265C3
Raymondville..............................  271C2, 289A
Refugio...................................  263A, 291C3
Reno......................................  255A
Rio Grande City...........................  236A, 298C2
Robinson..................................  300A
Robstown..................................  260C1, 286A
Rockdale..................................  253A
Rockport..................................  272C2
Roma......................................  249A
Rosenberg.................................  285A
Round Rock................................  290C2
Rusk......................................  249C3
San Angelo................................  225C1, 230C1, 234C1, 248C1,
                                             254C, 261C2, 270C1, 289C3,
                                             298C1
San Antonio...............................  225C, 241C1, 247C, 258C,
                                             262C, 270C1, 274Cl, 283C1,
                                             298C
San Augustine.............................  223A
San Diego.................................  290C3
San Marcos................................  278C
Sanger....................................  281C3
San Saba..................................  246A
Seabrook..................................  221C1
Seadrift..................................  286a
Seguin....................................  287C
Seminole..................................  292A
Seymour...................................  230C2
Shamrock..................................  224A
Silsbee...................................  269A
Sinton....................................  267C1, 279C1
Slaton....................................  224C1
Snyder....................................  246A, 268C2
Sonora....................................  221A
South Padre Island........................  224A, 237A
Spearman..................................  252A
Stamford..................................  295C2
Stanton...................................  290C2
Stephenville..............................  252A
Sterling City.............................  243C2
Sulphur Springs...........................  240A
Sweetwater................................  244A
Tahoka....................................  237A, 262C1
Tatum.....................................  262A
Taylor....................................  282C2
Temple....................................  269C3
Terrell...................................  296A
Terrell Hills.............................  294C
Texarkana.................................  251C, 273C1
Thorndale.................................  257A
Three Rivers..............................  233C2
Tulia.....................................  285C3
Tye.......................................  259C1
Tyler.....................................  221C3, 226C1, 268C, 281C2
Uvalde....................................  229A, 272A, 285C3
Vernon....................................  272A
Victoria..................................  222A, 236C1, 254C1, 265A,
                                             300C1
Waco......................................  233A, 239C2, 248C, 260C,
                                             296A
Wake Village..............................  233A
Wellington................................  278C3
Whitehouse................................  297C2
Whitesboro................................  273C2
Wichita Falls.............................  225C1, 260C1, 277C1, 273A,
                                             292C2
Willis....................................  279C3
Winfield..................................  249C3
Winnie....................................  264C
Winnsboro.................................  284A
Winona....................................  274A
Winters...................................  241A
Woodville.................................  234C2
Yoakum....................................  223A
Yorktown..................................  242A
Zapata....................................  228A, 274A, 280A
------------------------------------------------------------------------


                                  Utah
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Blanding..................................  221A
Bountiful.................................  258C
Brian Head................................  251C
Brigham City..............................  264C, 295C
Castle Dale...............................  237C3
Cedar City................................  223C, 235C1
Centerville...............................  289C
Coalville.................................  223A
Delta.....................................  239C1
Huntington................................  296C2
Huntsville................................  276C3
Hurricane.................................  275C3
Kanab.....................................  266C1
Levan.....................................  256A
Logan.....................................  225C2, 233C
Manti.....................................  286C
Midvale...................................  274C
Moab......................................  246C1
Mona......................................  225A
Monroe....................................  257C2
Monticello................................  291C1
Nephi.....................................  224A, 280C1
Oakley....................................  268C1
Ogden.....................................  238C1, 250C, 266C, 270C
Orem......................................  298C
Payson....................................  222A
Price.....................................  252C3, 265A
Provo.....................................  235C, 242C
Randolph..................................  272A
Richfield.................................  229C, 248
Roosevelt.................................  232C1, 253C2
Roy.......................................  300C
St. George................................  228C2, 240C, 260C
Salt Lake City............................  227C, 231C, 246C, 254C,
                                             262C, 278C, 282C
Smithfield................................  280A
Spanish Fork..............................  293C1
Tooele....................................  221C3
Torrey....................................  253A
Tremonton.................................  286C
Vernal....................................  290C3
Wellington................................  221C3
------------------------------------------------------------------------


[[Page 110]]


                                 Vermont
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Addison...................................  229A
Barre.....................................  296A
Bellows Falls.............................  296A
Bennington................................  232A
Brandon...................................  268A
Brattleboro...............................  224A, 244A
Burlington................................  225C, 255C1, 300C
Canaan....................................  231C3
Danville..................................  239A
Derby Center..............................  221C3
Hartford..................................  282A
Killington................................  287C2
Lyndon....................................  249C3
Manchester................................  274B
Marlboro..................................  268A
Middlebury................................  265A
Montpelier................................  284C2
Randolph..................................  271C3
Royalton..................................  276A
Rupert....................................  281A
Rutland...................................  233C3, 246C2, 251C2
South Burlington..........................  238C3
Springfield...............................  228A
St. Albans................................  272A
St. Johnsbury.............................  288A
Stowe.....................................  269A
Vergennes.................................  294C2
Warren....................................  241A
Waterbury.................................  277C3
West Rutland..............................  298C3
White River Junction......................  237A
Wilmington................................  264A
Woodstock.................................  230A
------------------------------------------------------------------------


                                Virginia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abingdon..................................  224A
Accomac...................................  257B1
Alberta...................................  276A
Alta Vista................................  288A
Amherst...................................  300C1
Appomattox................................  274C1, 296A
Arlington.................................  286B
Ashland...................................  261A
Bedford...................................  295A
Berryville................................  288A
Big Stone Gap.............................  228C2
Blacksburg................................  287C3
Blackstone................................  228C3
Bluefield.................................  292A
Bowling Green.............................  245A
Bridgewater...............................  286A
Broadway..................................  238A
Buena Vista...............................  244A
Buffalo Gap...............................  238A
Cape Charles..............................  241B
Cedar Bluff...............................  299A
Charlottesville...........................  224A, 236A, 248B, 298A
Chase City................................  260C3
Chesa-Portsm-Va Bea.......................  271A
Chesapeake................................  229C1
Chester...................................  266A
Chincoteague..............................  243A
Christiansburg............................  264A
Churchville...............................  292B1
Clarksville...............................  252C3
Clifton Forge.............................  280A
Clinchco..................................  221A
Coeburn...................................  259C3
Colonial Beach............................  240A
Colonial Heights..........................  237B1
Covington.................................  265A
Crewe.....................................  284C1
Crozet....................................  272A, 278A
Culpeper..................................  276A
Danville..................................  277C1
Deltaville................................  222A
Dillwyn...................................  287A
Elkton....................................  252A
Emporia...................................  258A
Ettrick...................................  226A
Exmore....................................  291B1, 298B
Falmouth..................................  283A
Farmville.................................  225A, 239B, 267A
Fort Lee..................................  243B
Franklin..................................  269A
Fredericksburg............................  227B, 268B
Front Royal...............................  237A, 257A
Galax.....................................  251C
Gloucester................................  256A
Goochland.................................  263A
Gretna....................................  292A
Grundy....................................  249A
Hampton...................................  267B
Harrisonburg..............................  264B, 282B
Hot Springs...............................  296A
Jonesville................................  256A
Kilmarnock................................  269A
Lawrenceville.............................  288A
Lebanon...................................  297A
Louisa....................................  288A
Luray.....................................  280A, 289A
Lynchburg.................................  250C3, 261C3, 269C3, 290A
Manassas..................................  294B
Marion....................................  230C, 273A, 278A
Martinsville..............................  242C1
Mechanicsville............................  221B1
Mount Jackson.............................  245A
Narrows...................................  267A
Newport News..............................  247B
Norfolk...................................  239B, 254B, 259B, 263B,
                                             275B, 283B, 287B
Norton....................................  292A
Onley-Onancock............................  277B
Orange....................................  244A
Pennington Gap............................  288A
Petersburg................................  257A, 262A
Pound.....................................  272A
Powhatan..................................  297A
Pulaski...................................  296C3
Radford...................................  269A
Richlands.................................  264A, 288A
Richmond..................................  233B, 251B, 271B, 279B,
                                             289A, 293B
Roanoke...................................  222C, 235C, 256C, 285C3
Ruckersville..............................  270A
Rural Retreat.............................  237A
Salem.....................................  228A
Shawsville................................  273A
Shenandoah................................  296A
South Boston..............................  237A, 248C1
South Hill................................  255C3
Spotsylvania..............................  257A
Stanleytown...............................  260C3
Staunton..................................  228A, 232B1, 259B
Strasburg.................................  285A
Suffolk...................................  225B, 295C
Tappahannock..............................  288A
Tazewell..................................  261A
Vinton....................................  268A, 291A, 296A
Virginia Beach............................  235B

[[Page 111]]

 
Warrenton.................................  232A, 299B
Warsaw....................................  265A
West Point................................  300A
White Stone...............................  285A
Winchester................................  223B, 273B
Windsor...................................  299A
Woodbridge................................  290B
Woodstock.................................  229B1
Yorktown..................................  231B
------------------------------------------------------------------------


                               Washington
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aberdeen..................................  257C1, 284C2
Bellevue..................................  223C
Bellingham................................  225C, 282C
Bremerton.................................  295C
Camas.....................................  234C2
Cashmere..................................  294A
Castle Rock...............................  296C3
Centralia.................................  275C
Chehalis..................................  282A
Chelan....................................  228A
Cheney....................................  266C
Chewelah..................................  *274C3
Clarkston.................................  231C, 275A
Cle Elum..................................  229A
Colfax....................................  273C3
Colville..................................  221A
Davenport.................................  247C3
Dayton....................................  223C1
Deer Park.................................  296C3
Dishman...................................  293A
East Wenatchee............................  249A
Eatonville................................  285A
Edmonds...................................  287C1
Ellensburg................................  237C2, 276C2
Elma......................................  271C3
Ephrata...................................  222C2, 230C3
Forks.....................................  280A
Goldendale................................  272C3
Grand Coulee..............................  253C
Grandview.................................  265C2
Hoquiam...................................  237C3
Ilwaco....................................  280C3
Kelso.....................................  233A
Kennewick.................................  287C
Leavenworth...............................  266A
Long Beach................................  232A
Longview..................................  288A
Lynden....................................  293C
Mabton....................................  254C3
Manson....................................  234C3
McCleary..................................  245C3
Medical Lake..............................  270C2
Moses Lake................................  257A, 262C1
Naches....................................  245A, 257A
Newport...................................  285A
Ocean Shores..............................  228A
Olympia...................................  241C
Omak......................................  224C2, 282C2
Opportunity...............................  241C
Othello...................................  248C3
Pasco.....................................  252A, 267C3, 229A
Prosser...................................  269C3
Pullman...................................  249A, 258C, 282C1
Quincy....................................  240C3, 244A
Raymond...................................  249C3
Richland..................................  235C, 274C, 293C
Rock Island...............................  258A
Royal City................................  228A, 242C2
Seattle...................................  227C, 231C, 235C1, 239C,
                                             243C, 251C, 255C, 260C,
                                             264C, 268C, 273C, 299C
Shelton...................................  233A
South Bend................................  289C2
Spokane...................................  225C, 229C, 245C3, 251C,
                                             255C, 260C, 280C2, 284A,
                                             289C, 300C
Sunnyside.................................  244A
Tacoma....................................  247C, 279C, 291C
Toppenish.................................  225C2
Vancouver.................................  290C2
Wisp......................................  292A
Walla Walla...............................  227C1, 239C, 246C, 256C2,
                                             264C3, 265A
Wenatchee.................................  271C, 285C2
Westport..................................  267A
Wilson Creek..............................  278C1
Winlock...................................  236A
Winthrop..................................  248A
Yakima....................................  233C1, 252A, 259C3, 281C1,
                                             289C1, 297C
------------------------------------------------------------------------


                              West Virginia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Barrackville..............................  226A
Beckley...................................  258B, 279B
Berkeley Springs..........................  228A
Bethlehem.................................  288B1
Bluefield.................................  283C
Bridgeport................................  281A
Buckhannon................................  228B1, 267B
Charles Town..............................  252A
Charleston................................  241B, 248B, 260B, 274B
Clarksburg................................  224A, 285B1, 293B
Danville..................................  223A
Dunbar....................................  233A
Elkins....................................  234B1, 255B1
Elizabeth.................................  291A
Fairmont..................................  232A, 250B
Fisher....................................  279A
Grafton...................................  240A
Hinton....................................  272A
Huntington................................  263B, 277B, 300B
Kenova....................................  250A
Keyser....................................  231B, 296A
Kingwood..................................  244A, 299A
Lewisburg.................................  276A
Logan.....................................  270B
Lost Creek................................  242A
Mannington................................  274A
Martinsburg...............................  248B
Matewan...................................  294C3
Miami.....................................  297B
Milton....................................  292B1
Morgantown................................  261A, 270B
Moundsville...............................  243A
Mount Gay-Shamrock........................  234A
Mount Hope................................  290B
Mullens...................................  224A
New Martinsville..........................  222A, 258A, 280A
Oak Hill..................................  231B
Parkersburg...............................  236B, 256B1, 276A
Petersburg................................  269A
Pocatalico................................  254A
Point Pleasant............................  258A
Powhatan..................................  297A
Princeton.................................  240A, 254C3, 265A
Rainelle..................................  237B1

[[Page 112]]

 
Ravenswood................................  226A
Richwood..................................  288A
Ridgeley..................................  263A
Ripley....................................  252A
Romney....................................  261A, *281A
Ronceverte................................  249A
Salem.....................................  277A, 289A
South Charleston..........................  265A
Spencer...................................  284A
St. Albans................................  286B
St. Marys.................................  230B1, 287A
Summersville..............................  225B
Sutton....................................  246B1
Vienna....................................  261A
Webster Springs...........................  262B
Welch.....................................  275A
Weston....................................  272B1
Westover..................................  265A
Wheeling..................................  247B, 254B, 298B
White Sulphur Springs.....................  227A
Williamson................................  243B
Williamstown..............................  245A
------------------------------------------------------------------------


                                Wisconsin
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Adams.....................................  291A
Algoma....................................  244C3, 281A
Allouez...................................  294C3
Altoona...................................  251C3
Antigo....................................  287C1, 291C3
Appleton..................................  289C
Ashland...................................  244C2, 227C1, *275A
Augusta...................................  268C3
Balsam Lake...............................  285C3
Baradoo...................................  235B
Barron....................................  249A
Beaver Dam................................  237A
Berlin....................................  284A
Birnamwood................................  225A
Black River Falls.........................  259C3
Bloomer...................................  236C3
Brillion..................................  298C3
Brookfield................................  295A
Chetek....................................  294C2
Chippewa Falls............................  289C3
Cleveland.................................  251A
Clintonville..............................  222A
Columbus..................................  263A
Cornell...................................  260C3
Crandon...................................  276A
De Forest.................................  226A
De Pere...................................  240C3
Dickeyville...............................  266A
Dodgeville................................  257A
Durand....................................  240A
Eagle River...............................  233C2
Eau Claire................................  231C1, 264C1, 283C
Elk Mound.................................  225A
Evansville................................  290A
Fond Du Lac...............................  296A
Forestville...............................  271A
Fort Atkinson.............................  297B
Green Bay.................................  253C1, 266C
Hallie....................................  279C1
Hartford..................................  285A
Hayward...................................  222A, 266A
Iron River................................  297C3
Janesville................................  260B1
Kaukauna..................................  276C3, 285A
Kenosha...................................  236B
Kewaunee..................................  224A
La Crosse.................................  227C, 239C2, 285A, 292C3
Ladysmith.................................  224A, 226A
Lake Geneva...............................  241A
Lancaster.................................  249C3
Lomira....................................  249A
Madison...................................  251B, 268B, 273B, 281B
Manitowoc.................................  221A, 272A
Marathon..................................  285C3
Marinette.................................  236C1
Marshfield................................  293C1
Mauston...................................  221A
Mayville..................................  254A
Medford...................................  257C3
Menomonee Falls...........................  252A
Merrill...................................  281C3
Middleton.................................  292A
Milwaukee.................................  227B, 233B, 239B, 243B,
                                             247B, 256B, 271B, 275B,
                                             299B
Minocqua..................................  240C3
Mishicot..................................  234A
Monomonie.................................  221C3
Monroe....................................  229B
Mosinee...................................  234C2
Mount Horeb...............................  294A
Mukwonago.................................  287A
Neehah-Menasha............................  232C3, 262C2
Neillsville...............................  224A, 298C1
Nekoosa...................................  230C3, 288A
New Holstein..............................  225A
New London................................  228C2
New Richmond..............................  296C3
Oconto....................................  296A
Omro......................................  258C2
Oshkosh...................................  245A
Park Falls................................  254C2
Peshtigo..................................  242C2
Platteville...............................  296A
Plymouth..................................  283A
Port Washington...........................  261A
Portage...................................  240A, 261A
Prairie Du Chien..........................  232C2
Racine....................................  221A, 264B
Reedsburg.................................  275A, 285A
Rhinelander...............................  248C1, 261C1
Rice Lake.................................  242C1, 256C2
Richland Center...........................  265A
Ripon.....................................  241A
River Falls...............................  292A
Rudolph...................................  260C3
Sauk City.................................  242B1
Seymour...................................  282A
Shawano...................................  257C3
Sheboygan.................................  229A
Sheboygan Falls...........................  293A
Shell Lake................................  237C3
Siren.....................................  289A
Soldiers Grove............................  290A
Sparta....................................  246C1
Spencer...................................  222A
Spooner...................................  292A
Sturgeon Bay..............................  230C1, 249A, 259C2
Sturtevant................................  284A
Sun Prairie...............................  221A
Superior..................................  273C1
Suring....................................  274C1
Three Lakes...............................  229C2
Tomah.....................................  241C2, 255C, 233C3
Tomahawk..................................  223C3
Trempealeau...............................  288A
Two Rivers................................  246A, 255A

[[Page 113]]

 
Verona....................................  288A
Viroqua...................................  272A
Washburn..................................  290C1
Watertown.................................  231B
Waukesha..................................  291B
Waunakee..................................  286A
Waupaca...................................  224A
Wausau....................................  238C, 270C, 300C
Wautoma...................................  272A
Wauwatosa.................................  279B
West Bend.................................  223B
West Salem................................  261A
Westby....................................  280A
Whitehall.................................  272A
Whitewater................................  283A, 293A
Whiting...................................  244C2
Winneconne................................  280C3
Wisconsin Dells...........................  295A
Wisconsin Rapids..........................  277C1
------------------------------------------------------------------------


                                 Wyoming
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Afton.....................................  254A
Albin.....................................  297C2
Buffalo...................................  225C1
Burns.....................................  270C2
Casper....................................  233C, 238C, 247C1, 273C,
                                             279C, 284C1, 295C
Centennial................................  224A
Cheyenne..................................  250C1, 260A, 264C1, 285A,
                                             292C3
Chugwater.................................  258A
Cody......................................  250C
Diamondville..............................  287C2
Douglas...................................  257A
Evanston..................................  291C3, 252C2
Fort Bridger..............................  256C1
Gillette..................................  245C1, 249A, 264C1
Glendo....................................  261A
Glenrock..................................  252A
Green River...............................  221C
Greybull..................................  262C
Jackson...................................  227C, 237C, 245C1
Kemmerer..................................  297C2
Lander....................................  248C1
Laramie...................................  236C, 244A, 254A, 275C,
                                             283C2, 288C3
Lost Cabin................................  256C
Lovell....................................  296C
Manville..................................  255C1
Midwest...................................  300A
Mills.....................................  288A
Moorcroft.................................  228A
Newcastle.................................  257A
Pine Bluffs...............................  287C2
Pinedale..................................  2266A
Powell....................................  233C, 281C
Rawlins...................................  224A
Riverton..................................  226C1, 230C1
Rock River................................  240A
Rock Springs..............................  236C, 243C, 283C
Sheridan..................................  229C, 235C
Sundance..................................  276C1
Superior..................................  293C
Thermopolis...............................  252A, 269C1
Torrington................................  252C3
Wheatland.................................  269A
Worland...................................  241C2
------------------------------------------------------------------------


                             American Samoa
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Fagaitua..................................  276C2
Leone.....................................  230C1
Pago Pago.................................  221C3, 226C1
------------------------------------------------------------------------


                            Central Marianas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Saipan....................................  230A
------------------------------------------------------------------------


                                 Garapan
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Saipan....................................  258C1, 262C2, 266C3, 280C3
------------------------------------------------------------------------


                                  Guam
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Agana.....................................  230C2, 238C2, 248C2, 262C2,
                                             270C2, 275C
Dededo....................................  286C
Tumon.....................................  282A
------------------------------------------------------------------------


                               Puerto Rico
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aguada....................................  288A
Aguadilla.................................  225B, 262B
Arecibo...................................  293B1, 297B
Bayamon...................................  234B, 264B
Cabo Rojo.................................  272A
Caguas....................................  277B
Camuy.....................................  275B
Carolina..................................  299B
Cidra.....................................  249A
Corozal...................................  223B
Culebra...................................  254A
Fajardo...................................  243B
Guayama...................................  295B
Hormigueros...............................  221A, 291A
Isabela...................................  268B
Lajas.....................................  279B
Las Piedras...............................  252A
Luguillo..................................  221A
Manati....................................  245B
Maricao...................................  241B
Mayaguez..................................  231B, 248B, 254B
Naguabo...................................  225A
Ponce.....................................  227B1, 266B, 270B, 286B
Quebradillas..............................  258A
Rio Grande................................  247A
Rio Piedras...............................  239B
San German................................  236B
San Juan..................................  229B, 256B, 260B, 273B,
                                             284B, 289B
Santa Isabel..............................  251A
Utuado....................................  281B
Vieques...................................  291B
------------------------------------------------------------------------


                             Virgin Islands
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Charlotte Amalie..........................  *226A, 241B1, 250B, 271B,
                                             *275A, 282B, 287B, 297A

[[Page 114]]

 
Christiansted.............................  228B, 236B, 258B, 262B, 285A
Cruz Bay..................................  267B
Frederiksted..............................  253A, 269B1, 278A
------------------------------------------------------------------------


(Sec. 316, 66 Stat. 717; 47 U.S.C. 316; sec. 5, 48 Stat., as amended, 
1068; 47 U.S.C. 154, 155; secs. 2, 3, 4, 301, 303, 307, 308, 309, 315, 
317, 48 Stat. as amended, 1064, 1065, 1066, 1081, 1082, 1083, 1084, 
1085, 1088, 1089; (47 U.S.C. 152, 153, 301, 303, 307, 308, 309, 315, 
317); secs 1, 201-205, 208, 215, 218, 313, 314, 403, 404, 410, 602; 48 
Stat. as amended; 1070, 1071, 1072, 1073, 1076, 1077, 1087, 1094, 1098, 
1102 (47 U.S.C. 151, 201-205, 208, 215, 218, 313, 314, 403, 404, 410, 
602))

[FR 12711, Oct. 6, 1965]

    Editorial Note: For Federal Register citations affecting Sec. 73.202 
see the List of CFR Sections Affected in the Finding Aids section of 
this volume.



Sec. 73.203  Availability of channels.

    (a) Except as provided for in paragraph (b) of this section, 
applications may be filed to construct FM broadcast stations only at the 
communities and on the channels contained in the Table of Allotments 
(Sec. 73.202(b)). Applications that fail to comply with this 
requirements, whether or not accompanied by a petition to amend the 
Table, will not be accepted for tender.
    (b) Applications filed on a first come, first served basis may 
propose a lower or higher class adjacent, intermediate frequency or co-
channel. Applications for the modification of an existing FM broadcast 
station may propose a lower or higher class adjacent, intermediate 
frequency or co-channel, or an same class adjacent channel. In these 
cases, the applicant need not file a petition for rule making to amend 
the Table of Allotments (Sec. 73.202(b)) to specify the modified channel 
class.

    Note: Changes in channel and/or class by application are limited to 
modifications on first, second and third adjacent channels, intermediate 
frequency (IF) channels, and co-channels which require no other changes 
to the FM Table of Allotments. Applications requesting such 
modifications must meet either the minimum spacing requirements of 
Sec. 73.207 at the site specified in the application, without resort to 
the provisions of the Commission's Rules permitting short spaced 
stations as set forth in Secs. 73.213 through 73.215 or demonstrate by a 
separate exhibit attached to the application the existence of a suitable 
allotment site that fully complies with Secs. 73.207 and 73.315 without 
resort to Secs. 73.213 through 73.215.


[54 FR 11954, Mar. 23, 1989, as amended at 58 FR 38535, July 19, 1993]



Sec. 73.204  International agreements and other restrictions on use of channels.

    See Secs. 73.207, 73.220 and 73.1650.

[49 FR 10264, Mar. 20, 1984]



Sec. 73.205  Zones.

    For the purpose of allotments and assignments, the United States is 
divided into three zones as follows:
    (a) Zone I consists of that portion of the United States located 
within the confines of the following lines drawn on the United States 
Albers Equal Area Projection Map (based on standard parallels 291/2 deg. 
and 451/2 deg.; North American datum): Beginning at the most easterly 
point on the State boundary line between North Carolina and Virginia; 
thence in a straight line to a point on the Virginia-West Virginia 
boundary line located at north latitude 37 deg.49' and west longitude 
80 deg.12'30"; thence westerly along the southern boundary lines of the 
States of West Virginia, Ohio, Indiana, and Illinois to a point at the 
junction of the Illinois, Kentucky, and Missouri State boundary lines; 
thence northerly along the western boundary line of the State of 
Illinois to a point at the junction of the Illinois, Iowa, and Wisconsin 
State boundary lines; thence easterly along the northern State boundary 
line of Illinois to the 90th meridian; thence north along this meridian 
to the 43.5 deg. parallel; thence east along this parallel to the United 
States-Canada border; thence southerly and following that border until 
it again intersects the 43.5 deg. parallel; thence east along this 
parallel tothe 71st meridian; thence in a straight line to the 
intersection of the 69th meridian and the 45th parallel; thence east 
along the 45th parallel to the Atlantic Ocean. When any of the above 
lines pass through a city, the city shall be considered to be located in 
Zone I. (See Figure 1 of Sec. 73.699.)
    (b) Zone I-A consists of Puerto Rico, the Virgin Islands and that 
portion of

[[Page 115]]

the State of California which is located south of the 40th parallel.
    (c) Zone II consists of Alaska, Hawaii and the rest of the United 
States which is not located in either Zone I or Zone I-A.

[29 FR 14116, Oct. 14, 1964, and 31 FR 10125, July 27, 1966, as amended 
at 48 FR 29504, June 27, 1983]



Sec. 73.207  Minimum distance separation between stations.

    (a) Except for assignments made pursuant to Sec. 73.213 or 73.215, 
FM allotments and assignments must be separated from other allotments 
and assignments on the same channel (co-channel) and five pairs of 
adjacent channels by not less than the minimum distances specified in 
paragraphs (b) and (c) of this section. The Commission will not accept 
petitions to amend the Table of Allotments unless the reference points 
meet all of the minimum distance separation requirements of this 
section. The Commission will not accept applications for new stations, 
or applications to change the channel or location of existing 
assignments unless transmitter sites meet the minimum distance 
separation requirements of this section, or such applications conform to 
the requirements of Sec. 73.213 or 73.215. However, applications to 
modify the facilities of stations with short-spaced antenna locations 
authorized pursuant to prior waivers of the distance separation 
requirements may be accepted, provided that such applications propose to 
maintain or improve that particular spacing deficiency. Class D 
(secondary) assignments are subject only to the distance separation 
requirements contained in paragraph (b)(3) of this section. (See 
Sec. 73.512 for rules governing the channel and location of Class D 
(secondary) assignments.)
    (b) The distances listed in Tables A, B, and C apply to allotments 
and assignments on the same channel and each of five pairs of adjacent 
channels. The five pairs of adjacent channels are the first (200 kHz 
above and 200 kHz below the channel under consideration), the second 
(400 kHz above and below), the third (600 kHz above and below), the 
fifty-third (10.6 MHz above and below), and the fifty-fourth (10.8 MHz 
above and below). The distances in the Tables apply regardless of 
whether the proposed station class appears first or second in the 
``Relation'' column of the table.
    (1) Domestic allotments and assignments must be separated from each 
other by not less than the distances in Table A which follows:

 Table A--Minimum Distance Separation Requirements In Kilometers (Miles)
------------------------------------------------------------------------
                                     Co-               400/600    10.6/
            Relation               channel   200 kHz     kHz    10.8 MHz
------------------------------------------------------------------------
A to A..........................  115 (71)   72 (45)   31 (19)    10 (6)
A to B1.........................  143 (89)   96 (60)   48 (30)    12 (7)
A to B..........................       178  113 (70)   69 (43)    15 (9)
                                     (111)
A to C3.........................  142 (88)   89 (55)   42 (26)    12 (7)
A to C2.........................       166  106 (66)   55 (34)    15 (9)
                                     (103)
A to C1.........................       200  133 (83)   75 (47)   22 (14)
                                     (124)
A to C..........................       226       165   95 (59)   29 (18)
                                     (140)     (103)
B1 to B1........................       175  114 (71)   50 (31)    14 (9)
                                     (109)
B1 to B.........................       211  145 (90)   71 (44)   17 (11)
                                     (131)
B1 to C3........................       175  114 (71)   50 (31)    14 (9)
                                     (109)
B1 to C2........................       200  134 (83)   56 (35)   17 (11)
                                     (124)
B1 to C1........................       233       161   77 (48)   24 (15)
                                     (145)     (100)
B1 to C.........................       259       193  105 (65)   31 (19)
                                     (161)     (120)
B to B..........................       241       169   74 (46)   20 (12)
                                     (150)     (105)
B t0 C3.........................       211  145 (90)   71 (44)    17(11)
                                     (131)
B to C2.........................       241       169   74 (46)   20 (12)
                                     (150)     (105)
B to C1.........................       270       195   79 (49)   27 (17)
                                     (168)     (121)
B to C..........................       274       217  105 (65)   35 (22)
                                     (170)     (135)
C3 to C3........................  153 (95)   99 (62)   43 (27)    14 (9)
C3 to C2........................       177  117 (73)   56 (35)   17 (11)
                                     (110)
C3 to C1........................       211  144 (90)   76 (47)   24 (15)
                                     (131)
C3 to C.........................       237       176   96 (60)   31 (19)
                                     (147)     (109)
C2 to C2........................       190  130 (81)   58 (36)   20 (12)
                                     (118)
C2 to C1........................       224  158 (98)   79 (49)   27 (17)
                                     (139)
C2 to C.........................       249       188  105 (65)   35 (22)
                                     (155)     (117)
C1 to C1........................       245       177   82 (51)   34 (21)
                                     (152)     (110)
C1 to C.........................       270       209  105 (65)   41 (25)
                                     (168)     (130)
C to C..........................       290       241  105 (65)   48 (30)
                                     (180)     (150)
------------------------------------------------------------------------

    (2) Under the Canada-United States FM Broadcasting Agreement, 
domestic

[[Page 116]]

U.S. allotments and assignments within 320 kilometers (199 miles) of the 
common border must be separated from Canadian allotments and assignments 
by not less than the distances given in Table B, which follows. When 
applying Table B, U.S. Class C2 allotments and assignments are 
considered to be Class B; also, U.S. Class C3 allotments and assignments 
and U.S. Class A assignments operating with more than 3 kW ERP and 100 
meters antenna HAAT (or equivalent lower ERP and higher antenna HAAT 
based on a class contour distance of 24 km) are considered to be Class 
B1.

                         Table B--Minimum Distance Separation Requirements in Kilometers
----------------------------------------------------------------------------------------------------------------
                                                              Co-            Adjacent Channels            I.F.
                                                            Channel  -------------------------------------------
                         Relation                         -----------                                  10.6/10.8
                                                             0 kHz     200 kHz    400 kHz    600 kHz      MHz
----------------------------------------------------------------------------------------------------------------
A-A......................................................        132         85         45         37          8
A-B1.....................................................        180        113         62         54         16
A-B......................................................        206        132         76         69         16
A-C1.....................................................        239        164         98         90         32
A-C......................................................        242        177        108        100         32
B1-B1....................................................        197        131         70         57         24
B1-B.....................................................        223        149         84         71         24
B1-C1....................................................        256        181        106         92         40
B1-C.....................................................        259        195        116        103         40
B-B......................................................        237        164         94         74         24
                                                                                                       .........
B-C1.....................................................        271        195        115         95         40
B-C......................................................        274        209        125        106         40
C1-C1....................................................        292        217        134        101         48
C1-C.....................................................        302        230        144        111         48
C-C......................................................        306        241        153        113         48
----------------------------------------------------------------------------------------------------------------

    (3) Under the 1992 Mexico-United States FM Broadcasting Agreement, 
domestic U.S. assignments or allotments within 320 kilometers (199 
miles) of the common border must be separated from Mexican assignments 
or allotments by not less than the distances given in Table C in this 
paragraph (b)(3). When applying Table C--
    (i) U.S. or Mexican assignments or allotments which have been 
notified internationally as Class A are limited to a maximum of 3.0 kW 
ERP at 100 meters HAAT, or the equivalent;
    (ii) U.S. or Mexican assignments or allotments which have been 
notified internationally as Class AA are limited to a maximum of 6.0 kW 
ERP at 100 meters HAAT, or the equivalent;
    (iii) U.S. Class C3 assignments or allotments are considered Class 
B1;
    (iv) U.S. Class C2 assignments or allotments are considered Class B; 
and
    (v) Class C1 assignments or allotments assume maximum facilities of 
100 kW ERP at 300 meters HAAT. However, U.S. Class C1 stations may not, 
in any event, exceed the domestic U.S. limit of 100 kW ERP at 299 meters 
HAAT, or the equivalent.

     Table C--Minimum Distance Separation Requirements in Kilometers
------------------------------------------------------------------------
                                                     400 kHz    10.6 or
          Relation               Co-      200 kHz     or 600    10.8 MHz
                               Channel                 kHz       (I.F.)
------------------------------------------------------------------------
A to A......................        100         61         25          8
A to AA.....................        111         68         31          9
A to B1.....................        138         88         48         11
A to B......................        163        105         65         14
A to C1.....................        196        129         74         21
A to C......................        210        161         94         28
AA to AA....................        115         72         31         10
AA to B1....................        143         96         48         12
AA to B.....................        178        125         69         15
AA to C1....................        200        133         75         22
AA to C.....................        226        165         95         29
B1 to B1....................        175        114         50         14

[[Page 117]]

 
B1 to B.....................        211        145         71         17
B1 to C1....................        233        161         77         24
B1 to C.....................        259        193         96         31
B to B......................        237        164         65         20
B to C1.....................        270        195         79         27
B to C......................        270        215         98         35
C1 to C1....................        245        177         82         34
C1 to C.....................        270        209        102         41
C to C......................        290        228        105         48
------------------------------------------------------------------------

    (c) The distances listed below apply only to allotments and 
assignments on Channel 253 (98.5 MHz). The Commission will not accept 
petitions to amend the Table of Allotments, applications for new 
stations, or applications to change the channel or location of existing 
assignments where the following minimum distances (between transmitter 
sites, in kilometers) from any TV Channel 6 allotment or assignment are 
not met:

        Minimum Distance Separation From TV Channel 6 (82-88 MHz)
------------------------------------------------------------------------
                                                             TV Zones II
                   FM Class                      TV Zone I      & III
------------------------------------------------------------------------
A.............................................           17           22
B1............................................           19           23
B.............................................           22           26
C3............................................           19           23
C2............................................           22           26
C1............................................           29           33
C.............................................           36           41
------------------------------------------------------------------------


[48 FR 29504, June 27, 1983, as amended at 49 FR 10264, Mar. 20, 1984; 
49 FR 19670, May 9, 1984; 49 FR 50047, Dec. 26, 1984; 51 FR 26250, July 
22, 1986; 54 FR 14963, Apr. 14, 1989; 54 FR 16366, Apr. 24, 1989; 54 FR 
19374, May 5, 1989; 54 FR 35338, Aug. 25, 1989; 56 FR 27426, June 14, 
1991; 56 FR 57293, Nov. 8, 1991; 62 FR 50256, Sept. 25, 1997]



Sec. 73.208  Reference points and distance computations.

    (a)(1) The following reference points must be used to determine 
distance separation requirements when petitions to amend the Table of 
Allotments (Sec. 73.202(b)) are considered:
    (i) First, transmitter sites if authorized, or if proposed in 
applications with cut-off protection pursuant to paragraph (a)(3) of 
this section;
    (ii) Second, reference coordinates designated by the FCC;
    (iii) Third, coordinates listed in the United States Department of 
Interior publication entitled Index to the National Atlas of the United 
States of America; or
    (iv) Last, coordinates of the main post office.
    (The community's reference points for which the petition is 
submitted will normally be the coordinates listed in the above 
publication.)
    (2) When the distance between communities is calculated using 
community reference points and it does not meet the minimum separation 
requirements of Sec. 73.207, the channel may still be allotted if a 
transmitter site is available that would meet the minimum separation 
requirements and still permit the proposed station to meet the minimum 
field strength requirements of Sec. 73.315. A showing indicating the 
availability of a suitable site should be sumitted with the petition. In 
cases where a station is not authorized in a community or communities 
and the proposed channel cannot meet the separation requirement a 
showing should also be made indicating adequate distance between 
suitable transmitter sites for all communities.
    (3) Petitions to amend the Table of Allotments that do not meet 
minimum distance separation requirements to transmitter sites specified 
in pending applications will not be considered unless they are filed no 
later than:
    (i) The last day of a filing window if the application is for a new 
FM facility or a major change in the non-reserved band and is filed 
during a filing window established under section 73.3564(d)(3); or

[[Page 118]]

    (ii) The cut-off date established in a Commission Public Notice 
under Sec. 73.3564(d) and 73.3573(e) if the application is for a new FM 
facility or a major change in the reserved band; or
    (iii) The date of receipt of all other types of FM applications. If 
an application is amended so as to create a conflict with a petition for 
rule making filed prior to the date the amendment is filed, the amended 
application will be treated as if filed on the date of the amendment for 
purposes of this paragraph (a)(3).

    Note: If the filing of a conflicting FM application renders an 
otherwise timely filed counterproposal unacceptable, the counterproposal 
may be considered in the rulemaking proceeding if it is amended to 
protect the site of the previously filed FM application within 15 days 
after being placed on the Public Notice routinely issued by the staff 
concerning the filing of counterproposals. No proposals involving 
communities not already included in the proceeding can be introduced 
during the reply comment period as a method of resolving conflicts. The 
counterproponent is required to make a showing that, at the time it 
filed the counterproposal, it did not know, and could not have known by 
exercising due diligence, of the pendency of the conflicting FM 
application.

    (b) Station separations in licensing proceedings shall be determined 
by the distance between the coordinates of the proposed transmitter site 
in one community and
    (1) The coordinates of an authorized transmitter site for the 
pertinent channel in the other community; or, where such transmitter 
site is not available for use as a reference point,
    (2) Reference coordinates designated by the FCC; or, if none are 
designated,
    (3) The coordinates of the other community as listed in the 
publication listed in paragraph (a) of this section; or, if not 
contained therein,
    (4) The coordinates of the main post office of such other community.
    (5) In addition, where there are pending applications in other 
communities which, if granted, would have to be considered in 
determining station separations, the coordinates of the transmitter 
sites proposed in such applications must be used to determine whether 
the requirements with respect to minimum separations between the 
proposed stations in the respective cities have been met.
    (c) The method given in this paragraph shall be used to compute the 
distance between two reference points, except that, for computation of 
distance involving stations in Canada and Mexico, the method for 
distance computation specified in the applicable international agreement 
shall be used instead. The method set forth in this paragraph is valid 
only for distances not exceeding 475 km (295 miles).
    (1) Convert the latitudes and longitudes of each reference point 
from degree-minute-second format to degree-decimal format by dividing 
minutes by 60 and seconds by 3600, then adding the results to degrees.
    (2) Calculate the middle latitude between the two reference points 
by averaging the two latitudes as follows:

ML=(LAT1dd+LAT2dd)2

    (3) Calculate the number of kilometers per degree latitude 
difference for the middle latitude calculated in paragraph (c)(2) as 
follows:

KPDlat=111.13209-0.56605 cos(2ML)+0.00120 cos(4ML)

    (4) Calculate the number of kilometers per degree longitude 
difference for the middle latitude calculated in paragraph (c)(2) as 
follows:

KPDlon=111.41513 cos(ML)-0.09455 cos(3ML)+0.00012 cos(5ML)

    (5) Calculate the North-South distance in kilometers as follows:

NS=KPDlat(LAT1dd-LAT2dd)

    (6) Calculate the East-West distance in kilometers as follows:

EW=KPDlon(LON1dd-LON2dd)

    (7) Calculate the distance between the two reference points by 
taking the square root of the sum of the squares of the East-West and 
North-South distances as follows:

DIST=(NS2+ EW2)0.5

    (8) Round the distance to the nearest kilometer.
    (9) Terms used in this section are defined as follows:
    (i) LAT1dd and LON1dd=the coordinates of the 
first reference point in degree-decimal format.

[[Page 119]]

    (ii) LAT2dd and LON2dd=the coordinates of the 
second reference point in degree-decimal format.
    (iii) ML=the middle latitude in degree-decimal format.
    (iv) KPDlat=the number of kilometers per degree of 
latitude at a given middle latitude.
    (v) KPDlon=the number of kilometers per degree of 
longitude at a given middle latitude.
    (vi) NS=the North-South distance in kilometers.
    (vii) EW=the East-West distance in kilometers.
    (viii) DIST=the distance between the two reference points, in 
kilometers.

[28 FR 13623, Dec. 14, 1963, as amended at 29 FR 14116, Oct. 14, 1964; 
48 FR 29505, June 27, 1983; 52 FR 37788, Oct. 9, 1987; 52 FR 39920, Oct. 
26, 1987; 54 FR 9806, Mar. 8, 1989; 57 FR 36020, Aug. 12, 1992; 58 FR 
38537, July 19, 1993]



Sec. 73.209  Protection from interference.

    (a) Permittees and licensees of FM broadcast stations are not 
protected from any interference which may be caused by the grant of a 
new station, or of authority to modify the facilities of an existing 
station, in accordance with the provisions of this subpart. However, 
they are protected from interference caused by Class D (secondary) 
noncommercial educational FM stations. See Sec. 73.509.
    (b) The nature and extent of the protection from interference 
afforded FM broadcast stations operating on Channels 221-300 is limited 
to that which results when assignments are made in accordance with the 
rules in this subpart.

[43 FR 39715, Sept. 6, 1978 and 48 FR 29505, June 27, 1983; 54 FR 9802, 
Mar. 8, 1989]



Sec. 73.210  Station classes.

    (a) The rules applicable to a particular station, including minimum 
and maximum facilities requirements, are determined by its class. 
Possible class designations depend upon the zone in which the station's 
transmitter is located, or proposed to be located. The zones are defined 
in Sec. 73.205. Allotted station classes are indicated in the Table of 
Allotments, Sec. 73.202. Class A, B1 and B stations may be authorized in 
Zones I and I-A, Class A, C3, C2, C1, and C stations may be authorized 
in Zone II.
    (b) The power and antenna height requirements for each class are set 
forth in Sec. 73.211. If a station has an ERP and an antenna HAAT such 
that it cannot be classified using the maximum limits and minimum 
requirements in Sec. 73.211, its class shall be determined using the 
following procedure:
    (1) Determine the reference distance of the station using the 
procedure in paragraph (b)(1)(i) of Sec. 73.211. If this distance is 
less than or equal to 28 km, the station is Class A; otherwise,
    (2) For a station in Zone I or Zone I-A, except for Puerto Rico and 
the Virgin Islands:
    (i) If this distance is greater than 28 km and less than or equal to 
39 km, the station is Class B1.
    (ii) If this distance is greater than 39 km and less than or equal 
to 52 km, the station is Class B.
    (3) For a station in Zone II:
    (i) If this distance is greater than 28 km and less than or equal to 
39 km, the station is Class C3.
    (ii) If this distance is greater than 39 km and less than or equal 
to 52 km, the station is Class C2.
    (iii) If this distance is greater than 52 km and less than or equal 
to 72 km, the station is Class C1.
    (iv) If this distance is greater than 72 km and less than or equal 
to 92 km, the station is Class C.
    (4) For a station in Puerto Rico or the Virgin Islands:
    (i) If this distance is less than or equal to 42 km, the station is 
Class A.
    (ii) If this distance is greater than 42 km and less than or equal 
to 46 km, the station is Class B1.
    (iii) If this distance is greater then 46 km and less than or equal 
to 78 km, the station is Class B.

[52 FR 37788, Oct. 9, 1987; 52 FR 39920, Oct. 26, 1987, as amended at 54 
FR 16367, Apr. 24, 1989; 54 FR 19374, May 5, 1989; 54 FR 35339, Aug. 25, 
1989]



Sec. 73.211  Power and antenna height requirements.

    (a) Minimum requirements. (1) Except as provided in paragraphs 
(a)(3) and (b)(2) of this section, FM stations must operate with a 
minimum effective radiated power (ERP) as follows:
    (i) The minimum ERP for Class A stations is 0.1 kW.

[[Page 120]]

    (ii) The ERP for Class B1 stations must exceed 6 kW.
    (iii) The ERP for Class B stations must exceed 25 kW.
    (iv) The ERP for Class C3 stations must exceed 6 kW.
    (v) The ERP for Class C2 stations must exceed 25 kW.
    (vi) The ERP for Class C1 stations must exceed 50 kW.
    (vii) The minimum ERP for Class C stations is 100 kW.
    (2) Class C stations must have an antenna height above average 
terrain (HAAT) of at least 300 meters (984 feet). No minimum HAAT is 
specified for Classes A, B1, B, C3, C2, or C1 stations.
    (3) Stations of any class except Class A may have an ERP less than 
that specified in paragraph (a)(1) of this section, provided that the 
reference distance, determined in accordance with paragraph (b)(1)(i) of 
this section, exceeds the distance to the class contour for the next 
lower class. Class A stations may have an ERP less than 100 watts 
provided that the reference distance, determined in accordance with 
paragraph (b)(1)(i) of this section, equals or exceeds 6 kilometers.
    (b) Maximum limits. (1) Except for stations located in Puerto Rico 
or the Virgin Islands, the maximum ERP in any direction, reference HAAT, 
and distance to the class contour for each FM station class are listed 
below:

------------------------------------------------------------------------
                                                                 Class
                                                  Reference     contour
   Station class             Maximum ERP           HAAT in     distance
                                                    meters        in
                                                    (ft.)     kilometers
------------------------------------------------------------------------
A..................  6kW (7.8 dBk).............    100 (328)          28
B1.................  25kW (14.0 dBk)...........    100 (328)          39
B..................  50kW (17.0 dBk)...........    150 (492)          52
C3.................  25kW (14.0 dBk)...........    100 (328)          39
C2.................  50kW (17.0 dBk)...........    150 (492)          52
C1.................  100kW (20.0 dBk)..........    299 (981)          72
C..................  100kW (20.0 dBk)..........   600 (1968)          92
------------------------------------------------------------------------

    (i) The reference distance of a station is obtained by finding the 
predicted distance to the 1mV/m contour using Figure 1 of Sec. 73.333 
and then rounding to the nearest kilometer. Antenna HAAT is determined 
using the procedure in Sec. 73.313. If the HAAT so determined is less 
than 30 meters (100 feet), a HAAT of 30 meters must be used when finding 
the predicted distance to the 1 mV/m contour.
    (ii) If a station's ERP is equal to the maximum for its class, its 
antenna HAAT must not exceed the reference HAAT, regardless of the 
reference distance. For example, a Class A station operating with 6 kW 
ERP may have an antenna HAAT of 100 meters, but not 101 meters, even 
though the reference distance is 28 km in both cases.
    (iii) Except as provided in paragraph (b)(3) of this section, no 
station will be authorized in Zone I or I-A with an ERP equal to 50 kW 
and a HAAT exceeding 150 meters. No station will be authorized in Zone 
II with an ERP equal to 100 kW and a HAAT exceeding 600 meters.
    (2) If a station has an antenna HAAT greater than the reference HAAT 
for its class, its ERP must be lower than the class maximum such that 
the reference distance does not exceed the class contour distance. If 
the antenna HAAT is so great that the station's ERP must be lower than 
the minimum ERP for its class (specified in paragraphs (a)(1) and (a)(3) 
of this section), that lower ERP will become the minimum for that 
station.
    (3) For stations located in Puerto Rico or the Virgin Islands, the 
maximum ERP in any direction, reference HAAT, and distance to the class 
contour for each FM station class are listed below:

------------------------------------------------------------------------
                                                                 Class
                                                  Reference     contour
   Station class             Maximum ERP           HAAT in     distance
                                                    meters        in
                                                    (ft.)     kilometers
------------------------------------------------------------------------
A..................  6kW (7.8 dBk).............    240 (787)          42
B1.................  25kW (14.0 dBk)...........    150 (492)          46
B..................  50kW (17.0 dBk)...........   472 (1549)          78
------------------------------------------------------------------------

    (c) Existing stations. Stations authorized prior to March 1, 1984 
that do not conform to the requirements of this section may continue to 
operate as authorized. Stations operating with facilities in excess of 
those specified in paragraph (b) of this section may not increase their 
effective radiated powers or extend their 1 mV/m field strength contour 
beyond the location permitted by their present authorizations. The 
provisions of this section will not apply to applications to increase 
facilities for those stations operating with less than

[[Page 121]]

the minimum power specified in paragraph (a) of this section.

[53 FR 17042, May 13, 1988, as amended at 54 FR 16367, Apr. 24, 1989; 54 
FR 19374, May 5, 1989; 54 FR 35339, Aug. 25, 1989]



Sec. 73.212  Administrative changes in authorizations.

    (a) In the issuance of FM broadcast station authorizations, the 
Commission will specify the transmitter output power and effective 
radiated power in accordance with the following tabulation:

------------------------------------------------------------------------
                                                                Rounded
                                                                out to
                                                                nearest
                     Power (watts or kW)                        figure
                                                               (watts or
                                                                  kW)
------------------------------------------------------------------------
1 to 3......................................................         .05
3 to 10.....................................................          .1
10 to 30....................................................          .5
30 to 100...................................................           1
100 to 300..................................................           5
300 to 1,000................................................          10
------------------------------------------------------------------------

    (b) Antenna heights above average terrain will be rounded out to the 
nearest meter.

[28 FR 13623, Dec. 14, 1963, as amended at 48 FR 29506, June 27, 1983]



Sec. 73.213  Grandfathered short-spaced stations.

    (a) Stations at locations authorized prior to November 16, 1964, 
that did not meet the separation distances required by Sec. 73.207 and 
have remained continuously short-spaced since that time may be modified 
or relocated with respect to such short-spaced stations, provided that 
(i) any area predicted to receive interference lies completely within 
any area currently predicted to receive co-channel or first-adjacent 
channel interference as calculated in accordance with paragraph (a)(1) 
of this section, or that (ii) a showing is provided pursuant to 
paragraph (a)(2) of this section that demonstrates that the public 
interest would be served by the proposed changes.
    (1) The F(50,50) curves in Figure 1 of Sec. 73.333 are to be used in 
conjunction with the proposed effective radiated power and antenna 
height above average terrain, as calculated pursuant to Sec. 73.313(c), 
(d)(2) and (d)(3), using data for as many radials as necessary, to 
determine the location of the desired (service) field strength. The 
F(50,10) curves in Figure 1a of Sec. 73.333 are to be used in 
conjunction with the proposed effective radiated power and antenna 
height above average terrain, as calculated pursuant to Sec. 73.313(c), 
(d)(2) and (d)(3), using data for as many radials as necessary, to 
determine the location of the undesired (interfering) field strength. 
Predicted interference is defined to exist only for locations where the 
desired (service) field strength exceeds 0.5 mV/m (54 dBu) for a Class B 
station, 0.7 mV/m (57 dBu) for a Class B1 station, and 1 mV/m (60 dBu) 
for any other class of station.
    (i) Co-channel interference is predicted to exist, for the purpose 
of this section, at all locations where the undesired (interfering 
station) F(50,10) field strength exceeds a value 20 dB below the desired 
(service) F(50,50) field strength of the station being considered (e.g., 
where the protected field strength is 60 dBu, the interfering field 
strength must be 40 dBu or more for predicted interference to exist).
    (ii) First-adjacent channel interference is predicted to exist, for 
the purpose of this section, at all locations where the undesired 
(interfering station) F(50,10) field strength exceeds a value 6 dB below 
the desired (service) F(50,50) field strength of the station being 
considered (e.g., where the protected field strength is 60 dBu, the 
interfering field strength must be 54 dBu or more for predicted 
interference to exist).
    (2) For co-channel and first-adjacent channel stations, a showing 
that the public interest would be served by the changes proposed in an 
application must include exhibits demonstrating that the total area and 
population subject to co-channel or first-adjacent channel interference, 
caused and received, would be maintained or decreased. In addition, the 
showing must include exhibits demonstrating that the area and the 
population subject to co-channel or first-adjacent channel interference 
caused by the proposed facility to each short-spaced station 
individually is not increased. In all cases, the applicant must also 
show that any area predicted to lose service as a result of new co-
channel or first-adjacent-channel interference has adequate

[[Page 122]]

aural service remaining. For the purpose of this section, adequate 
service is defined as 5 or more aural services (AM or FM).
    (3) For co-channel and first-adjacent-channel stations, a copy of 
any application proposing interference caused in any areas where 
interference is not currently caused must be served upon the licensee(s) 
of the affected short-spaced station(s).
    (4) For stations covered by this paragraph (a), there are no 
distance separation or interference protection requirements with respect 
to second-adjacent and third-adjacent channel short-spacings that have 
existed continuously since November 16, 1964.
    (b) Stations at locations authorized prior to May 17, 1989, that did 
not meet the IF separation distances required by Sec. 73.207 and have 
remained short-spaced since that time may be modified or relocated 
provided that the overlap area of the two stations' 36 mV/m field 
strength contours is not increased.
    (c) Short spacings involving at least one Class A allotment or 
authorization. Stations that became short spaced on or after November 
16, 1964 (including stations that do not meet the minimum distance 
separation requirements of paragraph (c)(1) of this section and that 
propose to maintain or increase their existing distance separations) may 
be modified or relocated in accordance with paragraph (c)(1) or (c)(2) 
of this section, except that this provision does not apply to stations 
that became short spaced by grant of applications filed after October 1, 
1989, or filed pursuant to Sec. 73.215. If the reference coordinates of 
an allotment are short spaced to an authorized facility or another 
allotment (as a result of the revision of Sec. 73.207 in the Second 
Report and Order in MM Docket No. 88-375), an application for the 
allotment may be authorized, and subsequently modified after grant, in 
accordance with paragraph (c)(1) or (c)(2) of this section only with 
respect to such short spacing. No other stations will be authorized 
pursuant to these paragraphs.
    (1) Applications for authorization under requirements equivalent to 
those of prior rules. Each application for authority to operate a Class 
A station with no more than 3000 watts ERP and 100 meters antenna HAAT 
(or equivalent lower ERP and higher antenna HAAT based on a class 
contour distance of 24 km) must specify a transmitter site that meets 
the minimum distance separation requirements in this paragraph. Each 
application for authority to operate a Class A station with more than 
3000 watts ERP (up to a maximum of 5800 watts), but with an antenna HAAT 
lower than 100 meters such that the distance to the predicted 0.05 mV/m 
(34 dB V/m) F(50,10) field strength contour does not exceed 98 
km must specify a transmitter site that meets the minimum distance 
separation requirements in this paragraph. Each application for 
authority to operate an FM station of any class other than Class A must 
specify a transmitter site that meets the minimum distanceseparation 
requirements in this paragraph with respect to Class A stations 
operating pursuant to this paragraph or paragraph (c)(2) of this 
section, and that meets the minimum distance separation requirements of 
Sec. 73.207 with respect to all other stations.

                         Minimum Distance Separation Requirements in Kilometers (miles)
----------------------------------------------------------------------------------------------------------------
              Relation                    Co-channel          200 kHz          400/600 kHz       10.6/10.8 MHz
----------------------------------------------------------------------------------------------------------------
A to A..............................           105 (65)            64 (40)            27 (17)              8 (5)
A to B1.............................           138 (86)            88 (55)            48 (30)             11 (6)
A to B..............................          163 (101)           105 (65)            69 (43)             14 (9)
A to C3.............................           138 (86)            84 (52)            42 (26)             11 (6)
A to C2.............................          163 (101)           105 (65)            55 (34)             14 (9)
A to C1.............................          196 (122)           129 (80)            74 (46)            21 (13)
A to C..............................          222 (138)          161 (100)            94 (58)            28 (17)
----------------------------------------------------------------------------------------------------------------

    (2) Applications for authorization of Class A facilities greater 
than 3,000 watts ERP and 100 meters HAAT. Each application to operate a 
Class A station with an ERP and HAAT such that the reference distance 
would exceed 24

[[Page 123]]

kilometers must contain an exhibit demonstrating the consent of the 
licensee of each co-channel, first, second or third adjacent channel 
station (for which the requirements of Sec. 73.207 are not met) to a 
grant of that application. Each such application must specify a 
transmitter site that meets the applicable IF-related channel distance 
separation requirements of Sec. 73.207. Applications that specify a new 
transmitter site which is short-spaced to an FM station other than 
another Class A station which is seeking a mutual increase in facilities 
may be granted only if no alternative fully-spaced site or less short-
spaced site is available. Licensees of Class A stations seeking mutual 
increases in facilities need not show that a fully spaced site or less 
short-spaced site is available. Applications submitted pursuant to the 
provisions of this paragraph may be granted only if such action is 
consistent with the public interest.

[52 FR 37789, Oct. 9, 1987, as amended at 54 FR 14964, Apr. 14, 1989; 54 
FR 35339, Aug. 25, 1989; 56 FR 27426, June 14, 1991; 62 FR 50521, Sept. 
26, 1997; 63 FR 33876, June 22, 1998]



Sec. 73.215  Contour protection for short-spaced assignments.

    The Commission will accept applications that specify short-spaced 
antenna locations (locations that do not meet the domestic co-channel 
and adjacent channel minimum distance separation requirements of 
Sec. 73.207); Provided That, such applications propose contour 
protection, as defined in paragraph (a) of this section, with all short-
spaced assignments, applications and allotments, and meet the other 
applicable requirements of this section. Each application to be 
processed pursuant to this section must specifically request such 
processing on its face, and must include the necessary exhibit to 
demonstrate that the requisite contour protection will be provided. Such 
applications may be granted when the Commission determines that such 
action would serve the public interest, convenience, and necessity.
    (a) Contour protection. Contour protection, for the purpose of this 
section, means that on the same channel and on the first, second and 
third adjacent channels, the predicted interfering contours of the 
proposed station do not overlap the predicted protected contours of 
other short-spaced assignments, applications and allotments, and the 
predicted interfering contours of other short-spaced assignments, 
applications and allotments do not overlap the predicted protected 
contour of the proposed station.
    (1) The protected contours, for the purpose of this section, are 
defined as follows. For all Class B and B1 stations on Channels 221 
through 300 inclusive, the F(50,50) field strengths along the protected 
contours are 0.5 mV/m (54 dB) and 0.7 mV/m (57 dB), 
respectively. For all other stations, the F(50,50) field strength along 
the protected contour is 1.0 mV/m (60 dB).
    (2) The interfering contours, for the purpose of this section, are 
defined as follows. For co-channel stations, the F(50,10) field strength 
along the interfering contour is 20 dB lower than the F(50,50) field 
strength along the protected contour for which overlap is prohibited. 
For first adjacent channel stations (200 kHz), the F(50,10) 
field strength along the interfering contour is 6 dB lower than the 
F(50,50) field strength along the protected contour for which overlap is 
prohibited. For both second and third adjacent channel stations 
(400 kHz and 600 kHz), the F(50,10) field 
strength along the interfering contour is 40 dB higher than the F(50,50) 
field strength along the protected contour for which overlap is 
prohibited.
    (3) The locations of the protected and interfering contours of the 
proposed station and the other short-spaced assignments, applications 
and allotments must be determined in accordance with the procedures of 
paragraphs (c), (d)(2) and (d)(3) of Sec. 73.313, using data for as many 
radials as necessary to accurately locate the contours.
    (4) Stations in Puerto Rico and the Virgin Islands may submit 
application for short-spaced locations provided the predicted distance 
to their 1 mV/m field strength contour is not extended toward the 1 mV/m 
field strength contour of any short-spaced station.
    (b) Applicants requesting short-spaced assignments pursuant to this

[[Page 124]]

section must take into account the following factors in demonstrating 
that contour protection is achieved:
    (1) The ERP and antenna HAAT of the proposed station in the 
direction of the contours of other short-spaced assignments, 
applications and allotments. If a directional antenna is proposed, the 
pattern of that antenna must be used to calculate the ERP in particular 
directions. See Sec. 73.316 for additional requirements for directional 
antennas.
    (2) The ERP and antenna HAAT of other short-spaced assignments, 
applications and allotments in the direction of the contours of the 
proposed station. The ERP and antenna HAATs in the directions of concern 
must be determined as follows:
    (i) For vacant allotments, contours are based on the presumed use, 
at the allotment's reference point, of the maximum ERP that could be 
authorized for the station class of the allotment, and antenna HAATs in 
the directions of concern that would result from a non-directional 
antenna mounted at a standard eight-radial antenna HAAT equal to the 
reference HAAT for the station class of the allotment.
    (ii) For existing stations that were not authorized pursuant to this 
section, including stations with authorized ERP that exceeds the maximum 
ERP permitted by Sec. 73.211 for the standard eight-radial antenna HAAT 
employed, and for applications not requesting authorization pursuant to 
this section, contours are based on the presumed use of the maximum ERP 
for the applicable station class (as specified in Sec. 73.211), and the 
antenna HAATs in the directions of concern that would result from a non-
directional antenna mounted at a standard eight-radial antenna HAAT 
equal to the reference HAAT for the applicable station class, without 
regard to any other restrictions that may apply (e.g. zoning laws, FAA 
constraints, application of Sec. 73.213).

    (iii) For stations authorized pursuant to this section, except 
stations with authorized ERP that exceeds the maximum ERP permitted by 
Sec. 73.211 for the standard eight-radial antenna HAAT employed, 
contours are based on the use of the authorized ERP in the directions of 
concern, and HAATs in the directions of concern derived from the 
authorized standard eight-radial antenna HAAT. For stations with 
authorized ERP that exceeds the maximum ERP permitted by Sec. 73.211 for 
the standard eight-radial antenna HAAT employed, authorized under this 
section, contours are based on the presumed use of the maximum ERP for 
the applicable station class (as specified in Sec. 73.211), and antenna 
HAATs in the directions of concern that would result from a non-
directional antenna mounted at a standard eight-radial antenna HAAT 
equal to the reference HAAT for the applicable station class, without 
regard to any other restrictions that may apply.
    (iv) For applications containing a request for authorization 
pursuant to this section, except for applications to continue operation 
with authorized ERP that exceeds the maximum ERP permitted by 
Sec. 73.211 for the standard eight-radial antenna HAAT employed, 
contours are based on the use of the proposed ERP in the directions of 
concern, and antenna HAATs in the directions of concern derived from the 
proposed standard eight-radial antenna HAAT. For applications to 
continue operation with an ERP that exceeds the maximum ERP permitted by 
Sec. 73.211 for the standard eight-radial HAAT employed, if processing 
is requested under this section, contours are based on the presumed use 
of the maximum ERP for the applicable station class (as specified in 
Sec. 73.211), and antenna HAATs in the directions of concern that would 
result from a nondirectional antenna mounted at a standard eight-radial 
antenna HAAT equal to the reference HAAT for the applicable station 
class, without regard to any other restrictions that may apply.

    Note to paragraph (b): Applicants are cautioned that the antenna 
HAAT in any particular direction of concern will not usually be the same 
as the standard eight-radial antenna HAAT or the reference HAAT for the 
station class.

    (c) Applications submitted for processing pursuant to this section 
are not required to propose contour protection of any assignment, 
application or allotment for which the minimum distance

[[Page 125]]

separation requirements of Sec. 73.207 are met, and may, in the 
directions of those assignments, applications and allotments, employ the 
maximum ERP permitted by Sec. 73.211 for the standard eight-radial 
antenna HAAT employed.
    (d) Stations authorized pursuant to this section may be subsequently 
authorized on the basis of compliance with the domestic minimum 
separation distance requirements of Sec. 73.207, upon filing of an FCC 
Form 301 or FCC Form 340 (as appropriate) requesting a modification of 
authorization.
    (e) The Commission will not accept applications that specify a 
short-spaced antenna location for which the following minimum distance 
separation requirements, in kilometers (miles), are not met:

------------------------------------------------------------------------
                                                                400/600
              Relation                Co-Channel    200 kHz       kHz
------------------------------------------------------------------------
A to A..............................      92(57)      49(30)      29(18)
A to B1.............................     119(74)      72(45)      46(29)
A to B..............................     143(89)      96(60)      67(42)
A to C3.............................     119(74)      72(45)      40(25)
A to C2.............................     143(89)      89(55)      53(33)
A to C1.............................    178(111)     111(69)      73(45)
A to C..............................    203(126)     142(88)      93(58)
B1 to B1............................     143(89)      96(60)      48(30)
B1 to B.............................    178(111)     114(71)      69(43)
B1 to C3............................     143(89)      96(60)      48(30)
B1 to C2............................    175(109)     114(71)      55(34)
B1 to C1............................    200(124)     134(83)      75(47)
B1 to C.............................    233(145)    165(103)      95(59)
B to B..............................    211(131)     145(90)      71(44)
B to C3.............................    178(111)     114(70)      69(43)
B to C2.............................    211(131)     145(90)      71(44)
B to C1.............................    241(150)    169(105)      77(48)
B to C..............................    270(168)    195(121)     105(65)
C3 to C3............................     142(88)      89(55)      42(26)
C3 to C2............................    166(103)     106(66)      55(34)
C3 to C1............................    200(124)     133(83)      75(47)
C3 to C.............................    226(140)    165(103)      95(59)
C2 to C2............................    177(110)     117(73)      56(35)
C2 to C1............................    211(131)     144(90)      76(47)
C2 to C.............................    237(147)    176(109)      96(60)
C1 to C1............................    224(139)     158(98)      79(49)
C1 to C.............................    249(155)    188(117)     105(65)
C to C..............................    270(168)    209(130)     105(65)
------------------------------------------------------------------------


[54 FR 9802, Mar. 8, 1989, as amended at 54 FR 35340, Aug. 25, 1989; 56 
FR 57294, Nov. 8, 1991; 57 FR 46325, Oct. 8, 1992]



Sec. 73.220  Restrictions on use of channels.

    (a) The frequency 89.1 MHz (channel 206) is revised in the New York 
City metropolitan area for the use of the United Nations with the 
equivalent of an antenna height of 150 meters (492 feet) above average 
terrain and effective radiated power of 20 kWs, and the FCC will make no 
assignments which would cause objectionable interference with such use.
    (b) In Alaska, FM broadcast stations operating on Channels 221-300 
(92.1-107.9 MHz) shall not cause harmful interference to and must accept 
interference from non-Government fixed operations authorized prior to 
January 1, 1982.

[43 FR 45845, Oct. 4, 1978, as amended at 46 FR 50376, Oct. 13, 1981, 47 
FR 30068, July 12, 1982; 48 FR 29507, June 27, 1983]



Sec. 73.232  Territorial exclusivity.

    No licensee of an FM broadcast station shall have any arrangement 
with a network organization which prevents or hinders another station 
serving substantially the same area from broadcasting the network's 
programs not taken by the former station, or which prevents or hinders 
another station serving a substantially different area from broadcasting 
any program of the network organization: Provided, however, That this 
section does not prohibit arrangements under which the station is 
granted first call within its primary service area upon the network's 
programs. The term ``network organization'' means any organization 
originating program material, with or without commercial messages, and 
furnishing the same to stations interconnected so as to permit 
simultaneous broadcast by all or some of them. However, arrangements 
involving only stations under common ownership, or only the rebroadcast 
by one station of programming from another with no compensation other 
than a lump-sum payment by the station rebroadcasting, are not 
considered arrangements with a network organization. The term 
``arrangement`` means any contract, arrangement or understanding, 
express or implied.

[42 FR 16422, Mar. 28, 1977, as amended at 57 FR 48333, Oct. 23, 1992]



Sec. 73.239  Use of common antenna site.

    No FM broadcast station license or renewal of FM broadcast station 
license will be granted to any person who owns, leases, or controls a 
particular site which is peculiarly suitable for FM broadcasting in a 
particular area and (a) which is not available for

[[Page 126]]

use by other FM broadcast station licensees; and (b) no other comparable 
site is available in the area; and (c) where the exclusive use of such 
site by the applicant or licensee would unduly limit the number of FM 
broadcast stations that can be authorized in a particular area or would 
unduly restrict competition among FM broadcast stations.

[28 FR 13623, Dec. 14, 1963]



Sec. 73.258  Indicating instruments.

    (a) Each FM broadcast station shall be equipped with indicating 
instruments which conform with the specifications described in 
Sec. 73.1215 for determining power by the indirect method; for 
indicating the relative amplitude of the transmission line radio 
frequency current, voltage, or power; and with such other instruments as 
are necessary for the proper adjustment, operation, and maintenance of 
the transmitting system.
    (b) The function of each instrument shall be clearly and permanently 
shown in the instrument itself or on the panel immediately adjacent 
thereto.
    (c) In the event that any one of these indicating instruments 
becomes defective when no substitute which conforms with the required 
specifications is available, the station may be operated without the 
defective instrument pending its repair or replacement for a period not 
in excess of 60 days without further authority of the FCC: Provided 
that, if the defective instrument is the transmission line meter of a 
station which determines the output power by the direct method, the 
operating power shall be determined by the indirect method in accordance 
with Sec. 73.267(c) during the entire time the station is operated 
without the transmission line meter.
    (d) If conditions beyond the control of the licensee prevent the 
restoration of the meter to service within the above allowed period, an 
informal letter request in accordance with Sec. 73.3549 may be filed 
with the FCC, Attention: Audio Services Division, Mass Media Bureau, in 
Washington, DC, for such additional time as may be required to complete 
repairs of the defective instrument.

[41 FR 36818, Sept. 1, 1976, as amended at 48 FR 44805, Sept. 30, 1983; 
50 FR 32416, Aug. 12, 1985; 63 FR 33876, June 22, 1998]



Sec. 73.267  Determining operating power.

    (a) The operating power of each FM station is to be determined by 
either the direct or indirect method.
    (b) Direct method. The direct method of power determination for an 
FM station uses the indications of a calibrated transmission line meter 
(responsive to relative voltage, current, or power) located at the RF 
output terminals of the transmitter. This meter must be calibrated 
whenever there is any indication that the calibration is inaccurate or 
whenever any component of the metering circuit is repaired or replaced. 
The calibration must cover, as a minimum, the range from 90% to 105% of 
authorized power. The meter calibration may be checked by measuring the 
power at the transmitter terminals while either:
    (1) Operating the transmitter into the transmitting antenna, and 
determining actual operating power by the indirect method described in 
Sec. 73.267(c); or
    (2) Operating the transmitter into a load (of substantially zero 
reactance and a resistance equal to the transmission line characteristic 
impedance) and using an electrical device (within 5% 
accuracy) or temperature and coolant flow indicator (within 
4% accuracy) to determine the power.
    (3) The calibration must cover, as a minimum, the range from 90% to 
105% of authorized power and the meter must provide clear indications 
which will permit maintaining the operating power within the prescribed 
tolerance or the meter shall be calibrated to read directly in power 
units.
    (c) Indirect method. The operating power is determined by the 
indirect method by applying an appropriate factor to the input power to 
the last radio-frequency power amplifier stage of the transmitter, using 
the following formula:

Transmitter output power=Ep x Ip x F

Where:

Ep=DC input voltage of final radio stage.

[[Page 127]]

Ip=Total DC input current of final radio stage.
F=Efficiency factor.

    (1) If the above formula is not appropriate for the design of the 
transmitter final amplifier, use a formula specified by the transmitter 
manufacturer with other appropriate operating parameters.
    (2) The value of the efficiency factor, F, established for the 
authorized transmitter output power is to be used for maintaining the 
operating power, even though there may be some variation in F over the 
power operating range of the transmitter.
    (3) The value of F is to be determined and a record kept thereof by 
one of the following procedures listed in order of preference:
    (i) Using the most recent measurement data for calibration of the 
transmission line meter according to the procedures described in 
paragraph (b) of this section or the most recent measurements made by 
the licensee establishing the value of F. In the case of composite 
transmitters or those in which the final amplifier stages have been 
modified pursuant to FCC approval, the licensee must furnish the FCC and 
also retain with the station records the measurement data used as a 
basis for determining the value of F.
    (ii) Using measurement data shown on the transmitter manufacturer's 
test data supplied to the licensee; Provided, That measurements were 
made at the authorized frequency and transmitter output power.
    (iii) Using the transmitter manufacturer's measurement data 
submitted to the FCC for type acceptance and as shown in the instruction 
book supplied to the licensee.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[44 FR 58731, Oct. 11, 1979, as amended at 45 FR 28141, Apr. 28, 1980; 
48 FR 38479, Aug. 24, 1983; 49 FR 4210, Feb. 3, 1984; 49 FR 49851, Dec. 
24, 1984]



Sec. 73.277  Permissible transmissions.

    (a) No FM broadcast licensee or permittee shall enter into any 
agreement, arrangement or understanding, oral or written, whereby it 
undertakes to supply, or receives consideration for supplying, on its 
main channel a functional music, background music, or other subscription 
service (including storecasting) for reception in the place or places of 
business of any subscriber.
    (b) The transmission (or interruption) of radio energy in the FM 
broadcast band is permissible only pursuant to a station license, 
program test authority, construction permit, or experimental 
authorization and the provisions of this part of the rules.

[29 FR 7471, June 10, 1964. Redesignated at 39 FR 38655, Nov. 1, 1974 
and amended at 48 FR 28454, June 22, 1983]



Sec. 73.293  Use of FM multiplex subcarriers.

    Licensees of FM broadcast stations may transmit, without further 
authorization, subcarrier communication services in accordance with the 
provisions of Secs. 73.319 and 73.322.

[51 FR 17028, May 8, 1986]



Sec. 73.295  FM subsidiary communications services.

    (a) Subsidiary communication services are those transmitted on a 
subcarrier within the FM baseband signal, but do not include services 
which enhance the main program broadcast service, or exclusively relate 
to station operations (see Sec. 73.293). Subsidiary communications 
include, but are not limited to services such as functional music, 
specialized foreign language programs, radio reading services, utility 
load management, market and financial data and news, paging and calling, 
traffic control signal switching, bilingual television audio, and point 
to point or multipoint messages.
    (b) FM subsidiary communications services that are common carrier in 
nature are subject to common carrier regulation. Licensees operating 
such services are required to apply to the FCC for the appropriate 
authorization and to comply with all policies and rules applicable to 
the service. Responsibility for making the initial determinations of 
whether a particular activity is common carriage rests with the FM 
station licensee. Initial determinations by licensees are subject to FCC 
examination and may be reviewed at the FCC's discretion.

[[Page 128]]

    (c) Subsidiary communications services are of a secondary nature 
under the authority of the FM station authorization, and the authority 
to provide such communications services may not be retained or 
transferred in any manner separate from the station's authorization. The 
grant or renewal of an FM station permit or license is not furthered or 
promoted by proposed or past services. The permittee or licensee must 
establish that the broadcast operation is in the public interest wholly 
apart from the subsidiary communications services provided.
    (d) The station identification, delayed recording and sponsor 
identification announcements required by Secs. 73.1201, 73.1208, and 
73.1212 are not applicable to material transmitted under an SCA.
    (e) The licensee or permittee must retain control over all material 
transmitted in a broadcast mode via the station's facilities, with the 
right to reject any material that it deems inappropriate or undesirable.

[48 FR 28454, June 22, 1983, as amended at 48 FR 44805, Sept. 30, 1983; 
49 FR 33663, Aug. 15, 1984; 50 FR 32416, Aug. 12, 1985; 57 FR 48333, 
Oct. 23, 1992]



Sec. 73.297  FM stereophonic sound broadcasting.

    (a) An FM broadcast station may, without specific authority from the 
FCC, transmit stereophonic (biphonic, quadraphonic, etc.) sound programs 
upon installation of stereophonic sound transmitting equipment under the 
provisions of Secs. 2.1001, 73.322, and 73.1590 of the Rules. Prior to 
commencement of stereophonic sound broadcasting, equipment performance 
measurements must be made to ensure that the transmitted signal complies 
with all applicable rules and standards.
    (b) Each licensee or permittee engaging in multichannel broadcasting 
must measure the pilot subcarrier frequency as often as necessary to 
ensure that it is kept at all times within 2 Hz of the authorized 
frequency.

[48 FR 28454, June 22, 1983, and 48 FR 38479, Aug. 24, 1983]



Sec. 73.310  FM technical definitions.

    (a) Frequency modulation.
    Antenna height above average terrain (HAAT). HAAT is calculated by: 
determining the average of the antenna heights above the terrain from 3 
to 16 kilometers (2 to 10 miles) from the antenna for the eight 
directions evenly spaced for each 45 deg. of azimuth starting with True 
North (a different antenna height will be determined in each direction 
from the antenna): and computing the average of these separate heights. 
In some cases less than eight directions may be used. (See 
Sec. 73.313(d).) Where circular or elliptical polarization is used, the 
antenna height above average terrain must be based upon the height of 
the radiation of the antenna that transmits the horizontal component of 
radiation.
    Antenna power gain. The square of the ratio of the root-mean-square 
(RMS) free space field strength produced at 1 kilometer in the 
horizontal plane in millivolts per meter for 1 kW antenna input power to 
221.4 mV/m. This ratio is expressed in decibels (dB). If specified for a 
particular direction, antenna power gain is based on that field strength 
in the direction only.
    Auxiliary facility. An auxiliary facility is an antenna separate 
from the main facility's antenna, permanently installed on the same 
tower or at a different location, from which a station may broadcast for 
short periods without prior Commission authorization or notice to the 
Commission while the main facility is not in operation (e.g., where 
tower work necessitates turning off the main antenna or where lightning 
has caused damage to the main antenna or transmission system) (See 
Sec. 73.1675).
    Center frequency. The term ``center frequency'' means:
    (1) The average frequency of the emitted wave when modulated by a 
sinusoidal signal.
    (2) The frequency of the emitted wave without modulation.
    Composite antenna pattern. The composite antenna pattern is a 
relative field horizontal plane pattern for 360 degrees of azimuth, for 
which the value at a particular azimuth is the greater of the 
horizontally polarized or vertically polarized component relative field 
values. The composite antenna

[[Page 129]]

pattern is normalized to a maximum of unity (1.000) relative field.
    Composite baseband signal. A signal which is composed of all program 
and other communications signals that frequency modulates the FM 
carrier.
    Effective radiated power. The term ``effective radiated power'' 
means the product of the antenna power (transmitter output power less 
transmission line loss) times: (1) The antenna power gain, or (2) the 
antenna field gain squared. Where circular or elliptical polarization is 
employed, the term effective radiated power is applied separately to the 
horizontal and vertical components of radiation. For allocation 
purposes, the effective radiated power authorized is the horizontally 
polarized component of radiation only.
    Equivalent isotropically radiated power (EIRP). The term 
``equivalent isotropically radiated power (also known as ``effective 
radiated power above isotropic) means the product of the antenna input 
power and the antenna gain in a given direction relative to an isotropic 
antenna.
    FM Blanketing. Blanketing is that form of interference to the 
reception of other broadcast stations which is caused by the presence of 
an FM broadcast signal of 115 dBu (562 mV/m) or greater signal strength 
in the area adjacent to the antenna of the transmitting station. The 115 
dBu contour is referred to as the blanketing contour and the area within 
this contour is referred to as the blanketing area.
    FM broadcast band. The band of frequencies extending from 88 to 108 
MHz, which includes those assigned to noncommercial educational 
broadcasting.
    FM broadcast channel. A band of frequencies 200 kHz wide and 
designated by its center frequency. Channels for FM broadcast stations 
begin at 88.1 MHz and continue in successive steps of 200 kHz to and 
including 107.9 MHz.
    FM broadcast station. A station employing frequency modulation in 
the FM broadcast band and licensed primarily for the transmission of 
radiotelephone emissions intended to be received by the general public.
    Field strength. The electric field strength in the horizontal plane.
    Free space field strength. The field strength that would exist at a 
point in the absence of waves reflected from the earth or other 
reflecting objects.
    Frequency departure. The amount of variation of a carrier frequency 
or center frequency from its assigned value.
    Frequency deviation. The peak difference between modulated wave and 
the carrier frequency.
    Frequency modulation. A system of modulation where the instantaneous 
radio frequency varies in proportion to the instantaneous amplitude of 
the modulating signal (amplitude of modulating signal to be measured 
after pre-emphasis, if used) and the instantaneous radio frequency is 
independent of the frequency of the modulating signal.
    Frequency swing. The peak difference between the maximum and the 
minimum values of the instantaneous frequency of the carrier wave during 
modulation.
    Multiplex transmission. The term ``multiplex transmission'' means 
the simultaneous transmission of two or more signals within a single 
channel. Multiplex transmission as applied to FM broadcast stations 
means the transmission of facsimile or other signals in addition to the 
regular broadcast signals.
    Percentage modulation. The ratio of the actual frequency deviation 
to the frequency deviation defined as 100% modulation, expressed in 
percentage. For FM broadcast stations, a frequency deviation of 
plus-minus75kHz is defined as 100% modulation.
    (b) Stereophonic sound broadcasting.
    Cross-talk. An undesired signal occurring in one channel caused by 
an electrical signal in another channel.
    FM stereophonic broadcast. The transmission of a stereophonic 
program by a single FM broadcast station utilizing the main channel and 
a stereophonic subchannel.
    Left (or right) signal. The electrical output of a microphone or 
combination of microphones placed so as to convey the intensity, time, 
and location of sounds originating predominately to the listener's left 
(or right) of the center of the performing area.
    Left (or right) stereophonic channel. The left (or right) signal as 
electrically reproduced in reception of FM stereophonic broadcasts.

[[Page 130]]

    Main channel. The band of frequencies from 50 to 15,000 Hz which 
frequency-modulate the main carrier.
    Pilot subcarrier. A subcarrier that serves as a control signal for 
use in the reception of FM stereophonic sound broadcasts.
    Stereophonic separation. The ratio of the electrical signal caused 
in sound channel A to the signal caused in sound channel B by the 
transmission of only a channel B signal. Channels A and B may be any two 
channels of a stereophonic sound broadcast transmission system.
    Stereophonic sound. The audio information carried by plurality of 
channels arranged to afford the listener a sense of the spatial 
distribution of sound sources. Stereophonic sound broadcasting includes, 
but is not limited to, biphonic (two channel), triphonic (three channel) 
and quadrophonic (four channel) program services.
    Stereophonic sound subcarrier. A subcarrier within the FM broadcast 
baseband used for transmitting signals for stereophonic sound reception 
of the main broadcast program service.
    Stereophonic sound subchannel. The band of frequencies from 23 kHz 
to 99 kHz containing sound subcarriers and their associated sidebands.
    (c) Visual transmissions. Communications or message transmitted on a 
subcarrier intended for reception and visual presentation on a viewing 
screen, teleprinter, facsimile printer, or other form of graphic display 
or record.
    (d) Control and telemetry transmissions. Signals transmitted on a 
multiplex subcarrier intended for any form of control and switching 
functions or for equipment status data and aural or visual alarms.

[28 FR 13623, Dec. 14, 1963, as amended at 39 FR 10575, Mar. 21, 1974; 
44 FR 36038, June 20, 1979; 48 FR 28454, June 22, 1983; 48 FR 29507, 
June 27, 1983; 48 FR 37216, Aug. 17, 1983; 49 FR 45145, Nov. 15, 1984; 
57 FR 48333, Oct. 23, 1992; 62 FR 51058, Sept. 30, 1997]



Sec. 73.311  Field strength contours.

    (a) Applications for FM broadcast authorizations must show the field 
strength contours required by FCC Form 301 or FCC Form 340, as 
appropriate.
    (b) The field strength contours provided for in this section shall 
be considered for the following purposes only:
    (1) In the estimation of coverage resulting from the selection of a 
particular transmitter site by an applicant for an FM broadcast station.
    (2) In connection with problems of coverage arising out of 
application of Sec. 73.3555.
    (3) In determining compliance with Sec. 73.315(a) concerning the 
minimum field strength to be provided over the principal community to be 
served.
    (4) In determining compliance with Sec. 73.215 concerning contour 
protection.

[28 FR 13623, Dec. 14, 1963, as amended at 31 FR 10126, July 27, 1966; 
32 FR 11471, Aug. 9, 1967; 52 FR 10570, Apr. 2, 1987; 54 FR 9802, Mar. 
8, 1989]



Sec. 73.312  Topographic data.

    (a) In the preparation of the profile graphs previously described, 
and in determining the location and height above mean sea level of the 
antenna site, the elevation or contour intervals shall be taken from 
United States Geological Survey Topographic Quadrangle Maps, United 
States Army Corps of Engineers Maps or Tennessee Valley Authority maps, 
whichever is the latest, for all areas for which such maps are 
available. If such maps are not published for the area in question, the 
next best topographic information should be used. Topographic data may 
sometimes be obtained from state and municipal agencies. The data from 
the Sectional Aeronautical Charts (including bench marks) or railroad 
depot elevations and highway elevations from road maps may be used where 
no better information is available. In cases where limited topographic 
data can be obtained, use may be made of an altimeter in a car driven 
along roads extending generally radially from the transmitter site.
    (b) The Commission will not ordinarily require the submission of 
topographical maps for areas beyond 24 km (15 miles) from the antenna 
site, but the maps must include the principal city or cities to be 
served. If it appears necessary, additional data may be requested.
    (c) The U.S. Geological Survey Topography Quadrangle Sheets may be

[[Page 131]]

obtained from the U.S. Geological Survey Department of the Interior, 
Washington, DC 20240. The Sectional Aeronautical Charts are available 
from the U.S. Coast and Geodetic Survey, Department of Commerce, 
Washington, DC 20235. These maps may also be secured from branch offices 
and from authorized agents or dealers in most principal cities.
    (d) In lieu of maps, the average terrain elevation may be computer 
generated except in cases of dispute, using elevations from a 30 second, 
point or better topographic data file. The file must be identified and 
the data processed for intermediate points along each radial using 
linear interpolation techniques. The height above mean sea level of the 
antenna site must be obtained manually using appropriate topographic 
maps.

[28 FR 13623, Dec. 14, 1963, as amended at 31 FR 10126, July 27, 1966; 
49 FR 48937, Dec. 17, 1984; 58 FR 44950, Aug. 25, 1993; 63 FR 33877, 
June 22, 1998]



Sec. 73.313  Prediction of coverage.

    (a) All predictions of coverage made pursuant to this section shall 
be made without regard to interference and shall be made only on the 
basis of estimated field strengths.
    (b) Predictions of coverage shall be made only for the same purposes 
as relate to the use of field strength contours as specified in 
Sec. 73.311.
    (c) In predicting the distance to the field strength contours, the 
F(50,50) field strength chart, Figure 1 of Sec. 73.333 must be used. The 
50% field strength is defined as that value exceeded for 50% of the 
time.
    (1) The F(50,50) chart gives the estimated 50% field strengths 
exceeded at 50% of the locations in dB above 1 uV/m. The chart is based 
on an effective power radiated from a half-wave dipole antenna in free 
space, that produces an unattenuated field strength at 1 kilometer of 
about 107 dB above 1 uV/m (221.4 mV/m).
    (2) To use the chart for other ERP values, convert the ordinate 
scale by the appropriate adjustment in dB. For example, the ordinate 
scale for an ERP of 50 kW should be adjusted by 17 dB [10 log (50 kW) = 
17 dBk], and therefore a field strength of 60 dBu would correspond to 
the field strength value at (60-17 =) 44 dBu on the chart. When 
predicting the distance to field strength contours, use the maximum ERP 
of the main radiated lobe in the pertinent azimuthal direction (do not 
account for beam tilt). When predicting field strengths over areas not 
in the plane of the maximum main lobe, use the ERP in the direction of 
such areas, determined by considering the appropriate vertical radiation 
pattern.
    (d) The antenna height to be used with this chart is the height of 
the radiation center of the antenna above the average terrain along the 
radial in question. In determining the average elevation of the terrain, 
the elevations between 3 and 16 kilometers from the antenna site are 
used.
    (1) Profile graphs must be drawn for eight radials beginning at the 
antenna site and extending 16 kilometers therefrom. The radials should 
be drawn for each 45 deg. of azimuth starting with True North. At least 
one radial must include the principal community to be served even though 
it may be more than 16 kilometers from the antenna site. However, in the 
event none of the evenly spaced radials include the principal community 
to be served, and one or more such radials are drawn in addition, these 
radials must not be used in computing the antenna height above average 
terrain.
    (2) Where the 3 to 16 kilometers portion of a radial extends in 
whole or in part over a large body of water or extends over foreign 
territory but the 50 uV/m (34 dBu) contour encompasses land area within 
the United States beyond the 16 kilometers portion of the radial, the 
entire 3 to 16 kilometers portion of the radial must be included in the 
computation of antenna height above average terrain. However, where the 
50 uV/m (34 dBu) contour does not so encompass United States land area, 
and (i) the entire 3 to 16 kilometers portion of the radial extends over 
large bodies of water or over foreign territory, such radial must be 
completely omitted from the computation of antenna height above average 
terrain, and (ii) where a part of the 3 to 16 kilometers portion of a 
radial extends over

[[Page 132]]

large bodies of water or foreign territory, only that part of the radial 
extending from 3 kilometers to the outermost portion of land in the 
United States covered by the radial used must be used in the computation 
of antenna height above average terrain.
    (3) The profile graph for each radial should be plotted by contour 
intervals of from 12 to 30 meters and, where the data permits, at least 
50 points of elevation (generally uniformly spaced) should be used for 
each radial. In instances of very rugged terrain where the use of 
contour intervals of 30 meters would result in several points in a short 
distance, 60 or 120 meter contour intervals may be used for such 
distances. On the other hand, where the terrain is uniform or gently 
sloping the smallest contour interval indicated on the topographic map 
should be used, although only relatively few points may be available. 
The profile graph should indicate the topography accurately for each 
radial, and the graphs should be plotted with the distance in kilometers 
as the abscissa and the elevation in meters above mean sea level as the 
ordinate. The profile graphs should indicate the source of the 
topographical data used. The graph should also show the elevation of the 
center of the radiating system. The graph may be plotted either on 
rectangular coordinate paper or on special paper that shows the 
curvature of the earth. It is not necessary to take the curvature of the 
earth into consideration in this procedure as this factor is taken care 
of in the charts showing signal strengths. The average elevation of the 
13 kilometer distance between 3 and 16 kilometers from the antenna site 
should then be determined from the profile graph for each radial. This 
may be obtained by averaging a large number of equally spaced points, by 
using a planimeter, or by obtaining the median elevation (that exceeded 
for 50% of the distance) in sectors and averaging those values.
    (4) Examples of HAAT calculations:
    (i) The heights above average terrain on the eight radials are as 
follows:

------------------------------------------------------------------------
                                                                 Meters
------------------------------------------------------------------------
0 deg.........................................................       120
45 deg........................................................       255
90 deg........................................................       185
135 deg.......................................................        90
180 deg.......................................................       -10
225 deg.......................................................       -85
270 deg.......................................................        40
315 deg.......................................................        85
------------------------------------------------------------------------

    The antenna height above terrain (defined in Sec. 73.310(a)) is 
computed as follows:

(120+255+185+90-10-85+40+85)/8=85 meters.

    (ii) Same as paragraph (d)(4)(i) of this section, except the 0 deg. 
radial is entirely over sea water. The antenna height above average 
terrain is computed as follows (note that the divisor is 7 not 8):

(255+185+90-10-85+40+85)/7=80 meters.

    (iii) Same as paragraph (d)(4)(i) of this section, except that only 
the first 10 kilometers of the 90 deg. radial are in the United States; 
beyond 10 kilometers the 90 deg. radial is in a foreign country. The 
height above average terrain of the 3 to 10 kilometer portion of the 
90 deg. radial is 105 meters. The antenna height above average terrain 
is computed as follows (note that the divisor is 8 not 7.5):

(120+255+105+90-10-85+40+85)/8=75 meters.

    (e) In cases where the terrain in one or more directions from the 
antenna site departs widely from the average elevation of the 3 to 16 
kilometer sector, the prediction method may indicate contour distances 
that are different from what may be expected in practice. For example, a 
mountain ridge may indicate the practical limit of service although the 
prediction method may indicate otherwise. In such cases, the prediction 
method should be followed, but a supplemental showing may be made 
concerning the contour distances as determined by other means. Such 
supplemental showings should describe the procedure used and should 
include sample calculations. Maps of predicted coverage should include 
both the coverage as predicted by the regular method and as predicted by 
a supplemental method. When measurements of area are required, these 
should include the area obtained by the regular prediction method and 
the area obtained by the supplemental method. In directions

[[Page 133]]

where the terrain is such that antenna heights less than 30 meters for 
the 3 to 16 kilometer sector are obtained, an assumed height of 30 
meters must be used for the prediction of coverage. However, where the 
actual contour distances are critical factors, a supplemental showing of 
expected coverage must be included together with a description of the 
method used in predicting such coverage. In special cases, the FCC may 
require additional information as to terrain and coverage.
    (f) The effect of terrain roughness on the predicted field strength 
of a signal at points distant from an FM transmitting antenna is assumed 
to depend on the magnitude of a terrain roughness factor (h) which, for 
a specific propagation path, is determined by the characteristics of a 
segment of the terrain profile for that path 40 kilometers in length 
located between 10 and 50 kilometers from the antenna. The terrain 
roughness factor has a value equal to the distance, in meters, between 
elevations exceeded by all points on the profile for 10% and 90% 
respectively, of the length of the profile segment. (See Sec. 73.333, 
Figure 4.)
    (g) If the lowest field strength value of interest is initially 
predicted to occur over a particular propagation path at a distance that 
is less than 50 kilometers from the antenna, the terrain profile segment 
used in the determination of terrain roughness factor over that path 
must be that included between points 10 kilometers from the transmitter 
and such lesser distances. No terrain roughness correction need be 
applied when all field strength values of interest are predicted to 
occur 10 kilometers or less from the transmitting antenna.
    (h) Profile segments prepared for terrain roughness factor 
determinations are to be plotted in rectangular coordinates, with no 
less than 50 points evenly spaced within the segment using data obtained 
from topographic maps with contour intervals of approximately 15 meters 
(50 feet) or less if available.
    (i) The field strength charts (Sec. 73.333, Figs. 1-1a) were 
developed assuming a terrain roughness factor of 50 meters, which is 
considered to be representative of average terrain in the United States. 
Where the roughness factor for a particular propagation path is found to 
depart appreciably from this value, a terrain roughness correction 
(F) should be applied to field strength values along this path, 
as predicted with the use of these charts. The magnitude and sign of 
this correction, for any value of h, may be determined from a 
chart included in Sec. 73.333 as Figure 5.
    (j) Alternatively, the terrain roughness correction may be computed 
using the following formula:
    F=1.9-0.03(h)(1+f/300)
Where:

    F=terrain roughness correction in dB
    k=terrain roughness factor in meters
    f=frequency of signal in MHz (MHz)


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[28 FR 13623, Dec. 14, 1963, as amended at 40 FR 27678, July 1, 1975; 48 
FR 29507, June 27, 1983; 52 FR 11655, Apr. 10, 1987; 52 FR 37789, Oct. 
9, 1987; 57 FR 48333, Oct. 23, 1992; 63 FR 33877, June 22, 1998]

    Effective Date Note: At 42 FR 25736, May 19, 1977, the effective 
date of Sec. 73.313 paragraphs (i) and (j) was stayed indefinitely.



Sec. 73.314  Field strength measurements.

    (a) Except as provided for in Sec. 73.209, FM broadcast stations 
shall not be protected from any type of interference or propagation 
effect. Persons desiring to submit testimony, evidence or data to the 
Commission for the purpose of showing that the technical standards 
contained in this subpart do not properly reflect the levels of any 
given type of interference or propagation effect may do so only in 
appropriate rule making proceedings concerning the amendment of such 
technical standards. Persons making field strength measurements for 
formal submission to the Commission in rule making proceedings, or 
making such measurements upon the request of the Commission, shall 
follow the procedure for making and reporting such measurements outlined 
in paragraph (b) of this section. In instances where a showing of the 
measured level of a signal prevailing over a specific community is 
appropriate, the procedure for making and reporting field strength 
measurements for this purpose is set forth in paragraph (c) of this 
section.

[[Page 134]]

    (b) Collection of field strength data for propagation analysis.
    (1) Preparation for measurements. (i) On large scale topographic 
maps, eight or more radials are drawn from the transmitter location to 
the maximum distance at which measurements are to be made, with the 
angles included between adjacent radials of approximately equal size. 
Radials should be oriented so as to traverse representative types of 
terrain. The specific number of radials and their orientation should be 
such as to accomplish this objective.
    (ii) Each radial is marked, at a point exactly 16 kilometers from 
the transmitter and, at greater distances, at successive 3 kilometer 
intervals. Where measurements are to be conducted over extremely rugged 
terrain, shorter intervals may be used, but all such intervals must be 
of equal length. Accessible roads intersecting each radial as nearly as 
possible at each 3 kilometer marker are selected. These intersections 
are the points on the radial at which measurements are to be made, and 
are referred to subsequently as measuring locations. The elevation of 
each measuring location should approach the elevation at the 
corresponding 3 kilometer marker as nearly as possible.
    (2) Measurement procedure. All measurements must be made utilizing a 
receiving antenna designed for reception of the horizontally polarized 
signal component, elevated 9 meters above the roadbed. At each measuring 
location, the following procedure must be used:
    (i) The instrument calibration is checked.
    (ii) The antenna is elevated to a height of 9 meters.
    (iii) The receiving antenna is rotated to determine if the strongest 
signal is arriving from the direction of the transmitter.
    (iv) The antenna is oriented so that the sector of its response 
pattern over which maximum gain is realized is in the direction of the 
transmitter.
    (v) A mobile run of at least 30 meters is made, that is centered on 
the intersection of the radial and the road, and the measured field 
strength is continuously recorded on a chart recorder over the length of 
the run.
    (vi) The actual measuring location is marked exactly on the 
topographic map, and a written record, keyed to the specific location, 
is made of all factors which may affect the recorded field, such as 
topography, height and types of vegetation, buildings, obstacles, 
weather, and other local features.
    (vii) If, during the test conducted as described in paragraph 
(b)(2)(iii) of this section, the strongest signal is found to come from 
a direction other than from the transmitter, after the mobile run 
prescribed in paragraph (b)(2)(v) of this section is concluded, 
additional measurements must be made in a ``cluster'' of at least five 
fixed points. At each such point, the field strengths with the antenna 
oriented toward the transmitter, and with the antenna oriented so as to 
receive the strongest field, are measured and recorded. Generally, all 
points should be within 60 meters of the center point of the mobile run.
    (viii) If overhead obstacles preclude a mobile run of at least 30 
meters, a ``cluster'' of five spot measurements may be made in lieu of 
this run. The first measurement in the cluster is identified. Generally, 
the locations for other measurements must be within 60 meters of the 
location of the first.
    (3) Method of reporting measurements. A report of measurements to 
the Commission shall be submitted in affidavit form, in triplicate, and 
should contain the following information:
    (i) Tables of field strength measurements, which, for each measuring 
location, set forth the following data:
    (A) Distance from the transmitting antenna.
    (B) Ground elevation at measuring location.
    (C) Date, time of day, and weather.
    (D) Median field in dBu for 0 dBk, for mobile run or for cluster, as 
well as maximum and minimum measured field strengths.
    (E) Notes describing each measuring location.
    (ii) U.S. Geological Survey topographic maps, on which is shown the 
exact location at which each measurement was made. The original plots 
shall be made on maps of the largest available scale. Copies may be 
reduced

[[Page 135]]

in size for convenient submission to the Commission, but not to the 
extent that important detail is lost. The original maps shall be made 
available, if requested. If a large number of maps is involved, an index 
map should be submitted.
    (iii) All information necessary to determine the pertinent 
characteristics of the transmitting installation, including frequency, 
geographical coordinates of antenna site, rated and actual power output 
of transmitter, measured transmission line loss, antenna power gain, 
height of antenna above ground, above mean sea level, and above average 
terrain. The effective radiated power should be computed, and horizontal 
and vertical plane patterns of the transmitting antenna should be 
submitted.
    (iv) A list of calibrated equipment used in the field strength 
survey, which, for each instrument, specifies its manufacturer, type, 
serial number and rated accuracy, and the date of its most recent 
calibration by the manufacturer, or by a laboratory. Complete details of 
any instrument not of standard manufacture shall be submitted.
    (v) A detailed description of the calibration of the measuring 
equipment, including field strength meters, measuring antenna, and 
connecting cable.
    (vi) Terrain profiles in each direction in which measurements were 
made, drawn on curved earth paper for equivalent 4/3 earth radius, of 
the largest available scale.
    (c) Collection of field strength data to determine FM broadcast 
service in specific communities.
    (1) Preparation for measurement. (i) The population (P) of the 
community, and its suburbs, if any, is determined by reference to an 
appropriate source, e.g., the 1970 U.S. Census tables of population of 
cities and urbanized areas.
    (ii) The number of locations at which measurements are to be made 
shall be at least 15, and shall be approximately equal to 0.1(P)1/
2, if this product is a number greater than 15.
    (iii) A rectangular grid, of such size and shape as to encompass the 
boundaries of the community is drawn on an accurate map of the 
community. The number of line intersections on the grid included within 
the boundaries of the community shall be at least equal to the required 
number of measuring locations. The position of each intersection on the 
community map determines the location at which a measurement shall be 
made.
    (2) Measurement procedure. All measurements must be made using a 
receiving antenna designed for reception of the horizontally polarized 
signal component, elevated 9 meters above ground level.
    (i) Each measuring location shall be chosen as close as feasible to 
a point indicated on the map, as previously prepared, and at as nearly 
the same elevation as that point as possible.
    (ii) At each measuring location, after equipment calibration and 
elevation of the antenna, a check is made to determine whether the 
strongest signal arrives from a direction other than from the 
transmitter.
    (iii) At 20 percent or more of the measuring locations, mobile runs, 
as described in paragraph (b)(2) of this section shall be made, with no 
less than three such mobile runs in any case. The points at which mobile 
measurements are made shall be well separated. Spot measurements may be 
made at other measuring points.
    (iv) Each actual measuring location is marked exactly on the map of 
the community, and suitably keyed. A written record shall be maintained, 
describing, for each location, factors which may affect the recorded 
field, such as the approximate time of measurement, weather, topography, 
overhead wiring, heights and types of vegetation, buildings and other 
structures. The orientation, with respect to the measuring location 
shall be indicated of objects of such shape and size as to be capable of 
causing shadows or reflections. If the strongest signal received was 
found to arrive from a direction other than that of the transmitter, 
this fact shall be recorded.
    (3) Method of reporting measurements. A report of measurements to 
the Commission shall be submitted in affidavit form, in triplicate, and 
should contain the following information:
    (i) A map of the community showing each actual measuring location, 
specifically identifying the points at which mobile runs were made.

[[Page 136]]

    (ii) A table keyed to the above map, showing the field strength at 
each measuring point, reduced to dBu for the actual effective radiated 
power of the station. Weather, date, and time of each measurement shall 
be indicated.
    (iii) Notes describing each measuring location.
    (iv) A topographic map of the largest available scale on which are 
marked the community and the transmitter site of the station whose 
signals have been measured, which includes all areas on or near the 
direct path of signal propagation.
    (v) Computations of the mean and standard deviation of all measured 
field strengths, or a graph on which the distribution of measured field 
strength values is plotted.
    (vi) A list of calibrated equipment used for the measurements, which 
for each instrument, specifies its manufacturer, type, serial number and 
rated accuracy, and the date of its most recent calibration by the 
manufacturer, or by a laboratory. Complete details of any instrument not 
of standard manufacture shall be submitted.
    (vii) A detailed description of the procedure employed in the 
calibration of the measuring equipment, including field strength meters, 
measuring antenna, and connecting cable.

[40 FR 27682, July 1, 1975; 40 FR 28802, July 9, 1975, as amended at 48 
FR 29508, June 27, 1983]



Sec. 73.315  FM transmitter location.

    (a) The transmitter location shall be chosen so that, on the basis 
of the effective radiated power and antenna height above average terrain 
employed, a minimum field strength of 70 dB above one uV/m (dBu), or 
3.16 mV/m, will be provided over the entire principal community to be 
served.

    Note: The requirements of paragraph (a) of this section do not apply 
to noncommercial educational FM broadcast stations operating on reserved 
channels. (Channels 200 through 220)

    (b) The transmitter location should be chosen to maximize coverage 
to the city of license while minimizing interference. This is normally 
accomplished by locating in the least populated area available while 
maintaining the provisions of paragraph (a) of this section. In general, 
the transmitting antenna of a station should be located in the most 
sparsely populated area available at the highest elevation available. 
The location of the antenna should be so chosen that line-of-sight can 
be obtained from the antenna over the principle city or cities to be 
served; in no event should there be a major obstruction in this path.
    (c) The transmitting location should be selected so that the 1 mV/m 
contour encompasses the urban population within the area to be served. 
It is recognized that topography, shape of the desired service area, and 
population distribution may make the choice of a transmitter location 
difficult. In such cases consideration may be given to the use of a 
directional antenna system, although it is generally preferable to 
choose a site where a nondirectional antenna may be employed.
    (d) In cases of questionable antenna locations it is desirable to 
conduct propagation tests to indicate the field strength expected in the 
principal city or cities to be served and in other areas, particularly 
where severe shadow problems may be expected. In considering 
applications proposing the use of such locations, the Commission may 
require site tests to be made. Such tests should include measurements 
made in accordance with the measurement procedures described in 
Sec. 73.314, and full data thereon shall be supplied to the Commission. 
The test transmitter should employ an antenna having a height as close 
as possible to the proposed antenna height, using a balloon or other 
support if necessary and feasible. Information concerning the 
authorization of site tests may be obtained from the Commission upon 
request.
    (e) Cognizance must of course be taken regarding the possible hazard 
of the proposed antenna structure to aviation and the proximity of the 
proposed site to airports and airways. Procedures and standards with 
respect to the Commission's consideration of proposed antenna structures 
which will serve as a guide to persons intending to

[[Page 137]]

apply for radio station licenses are contained in Part 17 of this 
chapter (Construction, Marking, and Lighting of Antenna Structures).

[28 FR 13623, Dec. 14, 1963, as amended at 41 FR 22943, June 8, 1976; 49 
FR 38131, Sept. 27, 1984; 49 FR 45146, Nov. 15, 1984; 51 FR 9965, Mar. 
24, 1986; 52 FR 10570, Apr. 2, 1987]



Sec. 73.316  FM antenna systems.

    (a) It shall be standard to employ horizontal polarization; however, 
circular or elliptical polarization may be employed if desired. 
Clockwise or counterclockwise rotation may be used. The supplemental 
vertically polarized effective radiated power required for circular or 
elliptical polarization shall in no event exceed the effective radiated 
power authorized.
    (b) Directional antennas. A directional antenna is an antenna that 
is designed or altered for the purpose of obtaining a non-circular 
radiation pattern.
    (1) Applications for the use of directional antennas that propose a 
ratio of maximum to minimum radiation in the horizontal plane of more 
than 15 dB will not be accepted.
    (2) Directional antennas used to protect short-spaced stations 
pursuant to Sec. 73.213 or Sec. 73.215 of the rules, that have a 
radiation pattern which varies more than 2 dB per 10 degrees of azimuth 
will not be authorized.
    (c) Applications for directional antennas. (1) Applications for 
construction permit proposing the use of directional antenna systems 
must include a tabulation of the composite antenna pattern for the 
proposed directional antenna. A value of 1.0 must be used to correspond 
to the direction of maximum radiation. The pattern must be tabulated 
such that 0 deg. corresponds to the direction of maximum radiation or 
alternatively, in the case of an asymmetrical antenna pattern, the 
pattern must be tabulated such that 0 deg. corresponds to the actual 
azimuth with respect to true North. In the case of a composite antenna 
composed of two or more individual antennas, the pattern required is 
that for the composite antenna, not the patterns for each of the 
individual antennas. Applications must include valuations tabulated at 
intervals of not greater than ten (10) degrees. In addition, tabulated 
values of all maximas and minimas, with their corresponding azimuths, 
must be submitted.
    (2) Applications for license upon completion of antenna construction 
must include the following:
    (i) A complete description of the antenna system, including the 
manufacturer and model number of the directional antenna. It is not 
sufficient to label the antenna with only a generic term such as 
``dipole.'' In the case of individually designed antennas with no model 
number, or in the case of a composite antenna composed of two or more 
individual antennas, the antenna must be described as a ``custom'' or 
``composite'' antenna, as appropriate. A full description of the design 
of the antenna must also be submitted.
    (ii) A plot of the composite pattern of the directional antenna. A 
value of 1.0 must be used to correspond to the direction of maximum 
radiation. The plot of the pattern must be oriented such that 0 deg. 
corresponds to the direction of maximum radiation or alternatively, in 
the case of an asymmetrical antenna pattern, the plot must be oriented 
such that 0 deg. corresponds to the actual azimuth with respect to true 
North. The horizontal plane pattern must be plotted to the largest scale 
possible on unglazed letter-size polar coordinate paper (main engraving 
approximately 18 cm x 25 cm (7 inches x 10 inches)) using only scale 
divisions and subdivisions of 1, 2, 2.5, or 5 times 10-nth. Values of 
field strength less than 10% of the maximum field strength plotted on 
that pattern must be shown on an enlarged scale. In the case of a 
composite antenna composed of two or more individual antennas, the 
composite antenna pattern should be provided, and not the pattern for 
each of the individual antennas.
    (iii) A tabulation of the measured relative field pattern required 
in paragraph (c)(1) of this section. The tabulation must use the same 
zero degree reference as the plotted pattern, and must contain values 
for at least every 10 degrees. Sufficient vertical patterns to indicate 
clearly the radiation characteristics of the antenna above and below the 
horizontal plane. Complete information and patterns must be provided for 
angles of -10 deg. from the

[[Page 138]]

horizontal plane and sufficient additional information must be included 
on that portion of the pattern lying between +10 deg. and the zenith and 
-10 deg. and the nadir, to conclusively demonstrate the absence of 
undesirable lobes in these areas. The vertical plane pattern must be 
plotted on rectangular coordinate paper with reference to the horizontal 
plane. In the case of a composite antenna composed of two or more 
individual antennas, the composite antenna pattern should be used, and 
not the pattern for each of the individual antennas.
    (iv) A statement that the antenna is mounted on the top of an 
antenna tower recommended by the antenna manufacturer, or is side-
mounted on a particular type of antenna tower in accordance with 
specific instructions provided by the antenna manufacturer.
    (v) A statement that the directional antenna is not mounted on the 
top of an antenna tower which includes a top-mounted platform larger 
than the nominal cross-sectional area of the tower in the horizontal 
plane.
    (vi) A statement that no other antenna of any type is mounted on the 
same tower level as a directional antenna, and that no antenna of any 
type is mounted within any horizontal or vertical distance specified by 
the antenna manufacturer as being necessary for proper directional 
operation.
    (vii) A statement from an engineer listing such individual 
engineer's qualifications and certifying that the antenna has been 
installed pursuant to the manufacturer's instructions.
    (viii) A statement from a licensed surveyor that the installed 
antenna is properly oriented.
    (ix)(A) For a station authorized pursuant to Sec. 73.215 or Sec. 
Sec. 73.509, a showing that the root mean square (RMS) of the measured 
composite antenna pattern (encompassing both the horizontally and 
vertically polarized radiation components (in relative field)) is at 
least 85 percent of the RMS of the authorized composite directional 
antenna pattern (in relative field). The RMS value, for a composite 
antenna pattern specified in relative field values, may be determined 
from the following formula:
RMS=the square root of:
[(relative field value 1)\2\ + (relative field value 2)\2\ +....+ (last 
relative field value)\2\]

total number of relative field values
    (B) where the relative field values are taken from at least 36 
evenly spaced radials for the entire 360 degrees of azimuth. The 
application for license must also demonstrate that coverage of the 
community of license by the 70 dBu contour is maintained for stations 
authorized pursuant to Sec. 73.215 on Channels 221 through 300, as 
required by Sec. 73.315(a), while noncommercial educational stations 
operating on Channels 201 through 220 must show that the 60 dBu contour 
covers at least a portion of the community of license.
    (d) Applications proposing the use of FM transmitting antennas in 
the immediate vicinity (i.e. 60 meters or less) of other FM or TV 
broadcast antennas must include a showing as to the expected effect, if 
any, of such approximate operation.
    (e) Where an FM licensee or permittee proposes to mount its antenna 
on an AM antenna tower, or locate within 3.2 km of an AM antenna tower, 
the FM licensee or permittee must comply with Sec. 73.1692.

[28 FR 13623, Dec. 14, 1963, as amended at 34 FR 14222, Sept. 10, 1969; 
37 FR 25841, Dec. 5, 1972; 43 FR 53738, Nov. 17, 1978; 48 FR 29508, June 
27, 1983; 51 FR 17028, May 8, 1986; 54 FR 9804, Mar. 8, 1989; 56 FR 
57294, Nov. 8, 1991; 62 FR 51058, Sept. 30, 1997; 63 FR 70047, Dec. 18, 
1998]



Sec. 73.317  FM transmission system requirements.

    (a) FM broadcast stations employing transmitters authorized after 
January 1, 1960, must maintain the bandwidth occupied by their emissions 
in accordance with the specification detailed below. FM broadcast 
stations employing transmitters installed or type accepted before 
January 1, 1960, must achieve the highest degree of compliance with 
these specifications practicable with their existing equipment. In 
either case, should harmful interference to other authorized stations 
occur, the licensee shall correct the problem promptly or cease 
operation.
    (b) Any emission appearing on a frequency removed from the carrier 
by between 120 kHz and 240 kHz inclusive

[[Page 139]]

must be attenuated at least 25 dB below the level of the unmodulated 
carrier. Compliance with this requirement will be deemed to show the 
occupied bandwidth to be 240 kHz or less.
    (c) Any emission appearing on a frequency removed from the carrier 
by more than 240 kHz and up to and including 600 kHz must be attenuated 
at least 35 dB below the level of the unmodulated carrier.
    (d) Any emission appearing on a frequency removed from the carrier 
by more than 600 kHz must be attenuated at least 43 + 10 
Log10 (Power, in watts) dB below the level of the unmodulated 
carrier, or 80 dB, whichever is the lesser attenuation.
    (e) Preemphasis shall not be greater than the impedance-frequency 
characteristics of a series inductance resistance network having a time 
constant of 75 microseconds. (See upper curve of Figure 2 of 
Sec. 73.333.)

[51 FR 17028, May 8, 1986]



Sec. 73.318  FM blanketing interference.

    Areas adjacent to the transmitting antenna that receive a signal 
with a strength of 115 dBu (562 mV/m) or greater will be assumed to be 
blanketed. In determining the blanketed area, the 115 dBu contour is 
determined by calculating the inverse distance field using the effective 
radiated power of the maximum radiated lobe of the antenna without 
considering its vertical radiation pattern or height. For directional 
antennas, the effective radiated power in the pertinent bearing shall be 
used.
    (a) The distance to the 115 dBu contour is determined using the 
following equation:

D (in kilometers)=0.394 P
D (in miles)=0.245 P

Where P is the maximum effective radiated power (ERP), measured in 
kilowatts, of the maximum radiated lobe.
    (b) After January 1, 1985, permittees or licensees who either (1) 
commence program tests, or (2) replace their antennas, or (3) request 
facilities modifications and are issued a new construction permit must 
satisfy all complaints of blanketing interference which are received by 
the station during a one year period. The period begins with the 
commencement of program tests, or commencement of programming utilizing 
the new antenna. Resolution of complaints shall be at no cost to the 
complainant. These requirements specifically do not include interference 
complaints resulting from malfunctioning or mistuned receivers, 
improperly installed antenna systems, or the use of high gain antennas 
or antenna booster amplifiers. Mobile receivers and non-RF devices such 
as tape recorders or hi-fi amplifiers (phonographs) are also excluded.
    (c) A permittee collocating with one or more existing stations and 
beginning program tests on or after January 1, 1985, must assume full 
financial responsibility for remedying new complaints of blanketing 
interference for a period of one year. Two or more permittees that 
concurrently collocate on or after January 1, 1985, shall assume shared 
responsibility for remedying blanketing complaints within the blanketing 
area unless an offending station can be readily determined and then that 
station shall assume full financial responsibility.
    (d) Following the one year period of full financial obligation to 
satisfy blanketing complaints, licensees shall provide technical 
information or assistance to complainants on remedies for blanketing 
interference.

[28 FR 13623, Dec. 14, 1963, as amended at 52 FR 25866, July 9, 1987]



Sec. 73.319  FM multiplex subcarrier technical standards.

    (a) The technical specifications in this Section apply to all 
transmissions of FM multiplex subcarriers except those used for 
stereophonic sound broadcasts under the provisions of Sec. 73.322.
    (b) Modulation. Any form of modulation may be used for subcarrier 
operation.
    (c) Subcarrier baseband. (1) During monophonic program 
transmissions, multiplex subcarriers and their significant sidebands 
must be within the range of 20 kHz to 99 kHz.
    (2) During stereophonic sound program transmissions (see 
Sec. 73.322), multiplex subcarriers and their significant sidebands must 
be within the range of 53 kHz to 99 kHz.

[[Page 140]]

    (3) During periods when broadcast programs are not being 
transmitted, multiplex subcarriers and their significant sidebands must 
be within the range of 20 kHz to 99 kHz.
    (d) Subcarrier injection.
    (1) During monophonic program transmissions, modulation of the 
carrier by the arithmetic sum of all subcarriers may not exceed 30% 
referenced to 75 kHz modulation deviation. However, the modulation of 
the carrier by the arithmetic sum of all subcarriers above 75 kHz may 
not modulate the carrier by more than 10%.
    (2) During stereophonic program transmissions, modulation of the 
carrier by the arithmetic sum of all subcarriers may not exceed 20% 
referenced to 75 kHz modulation deviation. However, the modulation of 
the carrier by the arithmetic sum of all subcarriers above 75 kHz may 
not modulate the carrier by more than 10%.
    (3) During periods when no broadcast program service is transmitted, 
modulation of the carrier by the arithmetic sum of all subcarriers may 
not exceed 30% referenced to 75 kHz modulation deviation. However, the 
modulation of the carrier by the arithmetic sum of all subcarriers above 
75 kHz may not modulate the carrier by more than 10%.
    (4) Total modulation of the carrier wave during transmission of 
multiplex subcarriers used for subsidiary communications services must 
comply with the provisions Sec. 73.1570(b).
    (e) Subcarrier generators may be installed and used with a type 
accepted FM broadcast transmitter without specific authorization from 
the FCC provided the generator can be connected to the transmitter 
without requiring any mechanical or electrical modifications in the 
transmitter FM exciter circuits.
    (f) Stations installing multiplex subcarrier transmitting equipment 
must ensure the proper suppression of spurious or harmonic radiations. 
See Secs. 73.317, 73.1590 and 73.1690. If the subcarrier operation 
causes the station's transmissions not to comply with the technical 
provisions for FM broadcast stations or causes harmful interference to 
other communication services, the licensee or permittee must correct the 
problem promptly or cease operation. The licensee may be required to 
verify the corrective measures with supporting data. Such data must be 
retained at the station and be made available to the FCC upon request.

[48 FR 28455, June 22, 1983, as amended at 48 FR 37216, Aug. 17, 1983; 
49 FR 15080, Apr. 17, 1984; 49 FR 38131, Sept. 27, 1984; 50 FR 1534, 
Jan. 11, 1985; 51 FR 17029, May 8, 1986; 57 FR 48333, Oct. 23, 1992]



Sec. 73.322  FM stereophonic sound transmission standards.

    (a) An FM broadcast station shall not use 19 kHz 20 Hz, 
except as the stereophonic pilot frequency in a transmission system 
meeting the following parameters:
    (1) The modulating signal for the main channel consists of the sum 
of the right and left signals.
    (2) The pilot subcarrier at 19 kHz 2 Hz, must frequency 
modulate the main carrier between the limits of 8 and 10 percent.
    (3) One stereophonic subcarrier must be the second harmonic of the 
pilot subcarrier (i.e. 38 kHz) and must cross the time axis with a 
positive slope simultaneously with each crossing of the time axis by the 
pilot subcarrier. Additional stereophomic subcarriers are not precluded.
    (4) Double sideband, suppressed-carrier, amplitude modulation of the 
stereophonic subcarrier at 38 kHz must be used.
    (5) The stereophonic subcarrier at 38 kHz must be suppressed to a 
level less than 1% modulation of the main carrier.
    (6) The modulating signal for the required stereophonic subcarrier 
must be equal to the difference of the left and right signals.
    (7) The following modulation levels apply:
    (i) When a signal exists in only one channel of a two channel 
(biphonic) sound transmission, modulation of the carrier by audio 
components within the baseband range of 50 Hz to 15 kHz shall not exceed 
45% and modulation of the carrier by the sum of the amplitude modulated 
subcarrier in the baseband range of 23 kHz to 53 kHz shall not exceed 
45%.

[[Page 141]]

    (ii) When a signal exists in only one channel of a stereophonic 
sound transmission having more than one stereophonic subcarrier in the 
baseband, the modulation of the carrier by audio components within the 
audio baseband range of 23 kHz to 99 kHz shall not exceed 53% with total 
modulation not to exceed 90%.
    (b) Stations not transmitting stereo with the method described in 
(a), must limit the main carrier deviation caused by any modulating 
signals occupying the band 19 kHz 20 Hz to 125 Hz.
    (c) All stations, regardless of the stereophonic transmission system 
used, must not exceed the maximum modulation limits specified in 
Sec. 73.1570(b)(2). Stations not using the method described in (a), must 
limit the modulation of the carrier by audio components within the audio 
baseband range of 23 kHz to 99 kHz to not exceed 53%.

[51 FR 17029, May 8, 1986]



Sec. 73.333  Engineering charts.

    This section consists of the following Figures 1, 1a, 2, and slider 
4 and 5.

    Note: The figures reproduced herein, due to their small scale, are 
not to be used in connection with material submitted to the F.C.C.


[[Page 142]]


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(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))
[28 FR 13623, Dec. 14, 1963, as amended at 35 FR 2591, Feb. 5, 1970; 40 
FR 27679, July 1, 1975; 45 FR 28141, Apr. 28, 1980; 48 FR 29508, June 
27, 1983; 49 FR 19670, May 9, 1984]

    Effective Date Note: At 42 FR 25736, May 19, 1977, the effective 
date of Figures 4 and 5 was stayed indefinitely.

[[Page 148]]



       Subpart C--Noncommercial Educational FM Broadcast Stations



Sec. 73.501  Channels available for assignment.

    (a) The following frequencies, except as provided in paragraph (b) 
of this section, are available for noncommercial educational FM 
broadcasting:

------------------------------------------------------------------------
                                                                Channel
                       Frequency (MHz)                            No.
------------------------------------------------------------------------
87.9........................................................     \1\ 200
88.1........................................................         201
88.3........................................................         202
88.5........................................................         203
88.7........................................................         204
88.9........................................................         205
89.1........................................................     \2\ 206
89.3........................................................         207
89.5........................................................         208
89.7........................................................         209
89.9........................................................         210
90.1........................................................         211
90.3........................................................         212
90.5........................................................         213
90.7........................................................         214
90.9........................................................         215
91.1........................................................         216
91.3........................................................         217
91.5........................................................         218
91.7........................................................         219
91.9........................................................         220
------------------------------------------------------------------------
\1\ The frequency 87.9 MHz, Channel 200, is available only for use of
  existing Class D stations required to change frequency. It is
  available only on a noninterference basis with respect to TV Channel 6
  stations and adjacent channel noncommercial educational FM stations.
  It is not available at all within 402 kilometers (250 miles) of Canada
  and 320 kilometers (199 miles) of Mexico. The specific standards
  governing its use are contained in Sec.  73.512.
\2\ The frequency 89.1 MHz, Channel 206, in the New York City
  metropolitan area, is reserved for the use of the United Nations with
  the equivalent of an antenna height of 150 meters (492 feet) above
  average terrain and effective radiated power of 20 kW and the
  Commission will make no assignments which would cause objectionable
  interference with such use.

    (b) In Alaska, FM broadcast stations operating on Channels 200-220 
(87.9-91.9 MHz) shall not cause harmful interference to and must accept 
interference from non-Government fixed operations authorized prior to 
January 1, 1982.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[43 FR 39715, Sept. 6, 1978, as amended at 47 FR 30068, July 12, 1982; 
52 FR 43765, Nov. 16, 1987; 58 FR 44950, Aug. 25, 1993]



Sec. 73.502  State-wide plans.

    In considering the assignment of a channel for a noncommercial 
educational FM broadcast station, the Commission will take into 
consideration the extent to which each application meets the 
requirements of any state-wide plan for noncommercial educational FM 
broadcast stations filed with the Commission, provided that such plans 
afford fair treatment to public and private educational institutions, 
urban and rural, at the primary, secondary, higher, and adult 
educational levels, and appear otherwise fair and equitable.

[28 FR 13651, Dec. 14, 1963]



Sec. 73.503  Licensing requirements and service.

    The operation of, and the service furnished by noncommercial 
educational FM broadcast stations shall be governed by the following:
    (a) A noncommercial educational FM broadcast station will be 
licensed only to a nonprofit educational organization and upon showing 
that the station will be used for the advancement of an educational 
program.
    (1) In determining the eligibility of publicly supported educational 
organizations, the accreditation of their respective state departments 
of education shall be taken into consideration.
    (2) In determining the eligibility of privately controlled 
educational organizations, the accreditation of state departments of 
education and/or recognized regional and national educational 
accrediting organizations shall be taken into consideration.
    (b) Each station may transmit programs directed to specific schools 
in a system or systems for use in connection with the regular courses as 
well as routine and administrative material pertaining thereto and may 
transmit educational, cultural, and entertainment programs to the 
public.
    (c) A noncommercial educational FM broadcast station may broadcast 
programs produced by, or at the expense of, or furnished by persons 
other than the licensee, if no other consideration than the furnishing 
of the program and the costs incidental to its production and broadcast 
are received by the licensee. The payment of line charges by another 
station network, or someone other than the licensee of a noncommercial 
educational FM broadcast station, or general contributions to the 
operating costs of a station, shall not

[[Page 149]]

be considered as being prohibited by this paragraph.
    (d) Each station shall furnish a nonprofit and noncommercial 
broadcast service. Noncommercial educational FM broadcast stations are 
subject to the provisions of Sec. 73.1212 to the extent they are 
applicable to the broadcast of programs produced by, or at the expense 
of, or furnished by others. No promotional announcement on behalf of for 
profit entities shall be broadcast at any time in exchange for the 
receipt, in whole or in part, of consideration to the licensee, its 
principals, or employees. However, acknowledgements of contributions can 
be made. The scheduling of any announcements and acknowledgements may 
not interrupt regular programming.

    Note to Sec. 73.503: Commission interpretation on this rule, 
including the acceptable form of acknowledgements, may be found in the 
Second Report and Order in Docket No. 21136 (Commission Policy 
Concerning the Noncommercial Nature of Educational Broadcast Stations), 
86 FCC 2d 141 (1981); the Memorandum Opinion and Order in Docket No. 
21136, 90 FCC 2d 895 (1982), and the Memorandum Opinion and Order in 
Docket 21136, 97 FCC 2d 255 (1984). See also, ``Commission Policy 
Concerning the Noncommercial Nature of Educational Broadcast Stations,'' 
Public Notice, 7 FCC Rcd 827 (1992), which can be retrieved through the 
Internet at http://www.fcc.gov/mmb/asd/nature.html.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[28 FR 13651, Dec. 14, 1963, as amended at 35 FR 7558, May 15, 1970; 47 
FR 36178, Aug. 19, 1982; 49 FR 29069, July 18, 1984; 63 FR 33877, June 
22, 1998]



Sec. 73.504  Channel assignments in the Mexican border area.

    (a) NCE-FM stations within 199 miles (320 km) of the United States-
Mexican border shall comply with the separation requirements and other 
provisions of the ``Agreement between the United States of America and 
the United Mexican States Concerning Frequency Modulation Broadcasting 
in the 88 to 108 MHz Band'' as amended.
    (b) Applicants for noncommercial educational FM stations within 199 
miles (320 km) of the United States-Mexican border shall propose at 
least Class A minimum facilities (see Sec. 73.211(a)). However, existing 
Class D noncommercial educational stations may apply to change frequency 
within the educational portion of the FM band in accordance with the 
requirements set forth in Sec. 73.512.
    (c) Section 73.208 of this chapter shall be complied with as to the 
determination of reference points and distance computations used in 
applications for new or changed facilities. However, if it is necessary 
to consider a Mexican channel assignment or authorization, the 
computation of distance will be determined as follows: if a transmitter 
site has been established, on the basis of the coordinates of the site; 
if a transmitter site has not been established, on the basis of the 
reference coordinates of the community, town, or city.

[52 FR 43765, Nov. 16, 1987]



Sec. 73.505  Zones.

    For the purpose of assignment of noncommercial educational FM 
stations, the United States is divided into three zones, Zone I, Zone I-
A, and Zone II, having the boundaries specified in Sec. 73.205.

[42 FR 36828, July 18, 1977]



Sec. 73.506  Classes of noncommercial educational FM stations and channels.

    (a) Noncommercial educational stations operating on the channels 
specified in Sec. 73.501 are divided into the following classes:
    (1) A Class D educational station is one operating with no more than 
10 watts transmitter power output.
    (2) A Class D educational (secondary) station is one operating with 
no more than 10 watts transmitter power output in accordance with the 
terms of Sec. 73.512 or which has elected to follow these requirements 
before they become applicable under the terms of Sec. 73.512.
    (3) Noncommercial educational FM (NCE-FM) stations with more than 10 
watts transmitter power output are classified as Class A, B1, B, C3, C2, 
C1, or C depending on the station's effective radiated power and antenna 
height above average terrain, and on the zone in which the station's 
transmitter is located, on the same basis as set forth in Secs. 73.210 
and 73.211 for commercial stations.

[[Page 150]]

    (b) Any noncommercial educational station except Class D may be 
assigned to any of the channels listed in Sec. 73.501. Class D 
noncommercial educational FM stations applied for or authorized prior to 
June 1, 1980, may continue to operate on their authorized channels 
subject to the provisions of Sec. 73.512.

[43 FR 39715, Sept. 6, 1978, as amended at 49 FR 10264, Mar. 20, 1984; 
52 FR 47569, Dec. 15, 1987; 54 FR 16367, Apr. 24, 1989; 54 FR 19374, May 
5, 1989]



Sec. 73.507  Minimum distance separations between stations.

    (a) Minimum distance separations. No application for a new station, 
or change in channel or transmitter site or increase in facilities of an 
existing station, will be granted unless the proposed facilities will be 
located so as to meet the adjacent channel distance separations 
specified in Sec. 73.207(a) for the class of station involved with 
respect to assignment on Channels 221, 222, and 223 listed in 
Sec. 73.201 (except where in the case of an existing station the 
proposed facilities fall within the provisions of Sec. 73.207(b)), or 
where a Class D station is changing frequency to comply with the 
requirements of Sec. 73.512.
    (b) Stations authorized as of September 10, 1962, which do not meet 
the requirements of paragraph (a) of this section and Sec. 73.511, may 
continue to operate as authorized; but any application to change 
facilities will be subject to the provisions of this section.
    (c)(1) Stations separated in frequency by 10.6 or 10.8 MHz (53 or 54 
channels) from allotments or assignments on non-reserved channels will 
not be authorized unless they conform to the separations in Table A 
given in Sec. 73.207.
    (2) Under the United States-Mexican FM Broadcasting Agreement, for 
stations and assignments differing in frequency by 10.6 to 10.8 MHz (53 
or 54 channels), U.S. noncommercial educational FM allotments and 
assignments must meet the separations given in Table C of Sec. 73.207 to 
Mexican allotments or assignments in the border area.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[42 FR 36828, July 18, 1977, as amended at 43 FR 39716, Sept. 6, 1978; 
44 FR 65764, Nov. 15, 1979; 49 FR 10264, Mar. 20, 1984; 49 FR 19670, May 
9, 1984]



Sec. 73.508  Standards of good engineering practice.

    (a) All noncommercial educational stations operating with more than 
10 watts transmitter output power shall be subject to all of the 
provisions of the FM Technical Standards contained in subpart B of this 
part. Class D educational stations shall be subject to the definitions 
contained in Sec. 73.310 of subpart B of this part, and also to those 
other provisions of the FM Technical Standards which are specifically 
made applicable to them by the provisions of this subpart.
    (b) The transmitter and associated transmitting equipment of each 
noncommercial educational FM station licensed for transmitter output 
power above 10 watts must be designed, constructed and operated in 
accordance with Sec. 73.317.
    (c) The transmitter and associated transmitting equipment of each 
noncommercial educational FM station licensed for transmitter power 
output of 10 watts or less, although not required to meet all 
requirements of Sec. 73.317, must be constructed with the safety 
provisions of the current national electrical code as approved by the 
American Standards Association. These stations must be operated, tuned, 
and adjusted so that emissions are not radiated outside the authorized 
band causing or which are capable of causing interference to the 
communications of other stations. The audio distortion, audio frequency 
range, carrier hum, noise level, and other essential phases

[[Page 151]]

of the operation which control the external effects, must be at all 
times capable of providing satisfactory broadcast service. Studio 
equipment properly covered by an underwriter's certificate will be 
considered as satisfying safety requirements.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[28 FR 13651, Dec. 14, 1963. Redesignated at 42 FR 36828, July 18, 1977, 
and amended at 43 FR 53738, Nov. 17, 1978; 45 FR 28141, Apr. 28, 1980]



Sec. 73.509  Prohibited overlap.

    (a) An application for a new or modified NCE-FM station other than a 
Class D (secondary) station will not be accepted if the proposed 
operation would involve overlap of signal strength contours with any 
other station licensed by the Commission and operating in the reserved 
band (Channels 200-220, inclusive) as set forth below:

------------------------------------------------------------------------
                                      Contour of       Contour of other
      Frequency separation         proposed station         station
------------------------------------------------------------------------
Co-channel......................  0.1mV/m (40 dBu)..  1 mV/m (60 dBu).
                                  1 mV/m (60 dBu)...  0.1 mV/m (40 dBu).
200 kHz.........................  0.5 mV/m (54 dBu).  1 mV/m (60 dBu).
                                  1 mV/m (60 dBu)...  0.5 mV/m (54 dBu).
400 kHz.........................  10 mV/m (80 dBu)..  1 mV/m (60 dBu).
                                  1 mV/m (60 dBu)...  10 mV/m (80 dBu).
600 kHz.........................  100 mV/m (100 dBu)  1 mV/m (60 dBu).
                                  1 mV/m (60 dBu)...  100 mV/m (100
                                                       dBu).
------------------------------------------------------------------------

    (b) An application by a Class D (secondary) station, other than an 
application to change class, will not be accepted if the proposed 
operation would involve overlap of signal strength contours with any 
other station as set forth below:

------------------------------------------------------------------------
                                      Contour of        Contour of any
      Frequency separation         proposed station      other station
------------------------------------------------------------------------
Co-channel......................  0.1 mV/m (40 dBu).  1 mV/m (60 dBu).
200 kHz.........................  0.5 mV/m (54 dBu).  1 mV/m (60 dBu).
400 kHz.........................  10 mV/m (80 dBu)..  1 mV/m (60 dBu).
600 kHz.........................  100 mV/m (100 dBu)  1 mV/m (60 dBu).
------------------------------------------------------------------------

    (c) The following standards must be used to compute the distances to 
the pertinent contours:
    (1) The distance of the 60 dBu (1 mV/m) contours are to be computed 
using Figure 1 of Sec. 73.333 [F(50,50) curves] of this part.
    (2) The distance to the other contours are to be computed using 
Figure 1a of Sec. 73.333 [F(50,10) curves]. In the event that the 
distance to the contour is below 16 kilometers (approximately 10 miles), 
and therefore not covered by Figure 1a, curves in Figure 1 must be used.
    (3) The effective radiated power (ERP) that is the maximum ERP for 
any elevation plane on any bearing will be used.
    (d) An application for a change (other than a change in channel) in 
the facilities of a NCE-FM broadcast station will be accepted even 
though overlap of signal strength contours, as specified in paragraphs 
(a) and (b) of this section, would occur with another station in an area 
where such overlap does not already exists, if:
    (1) The total area of overlap with that station would not be 
increased;
    (2) The area of overlap with any other station would not increase;
    (3) The area of overlap does not move significantly closer to the 
station receiving the overlap; and,
    (4) No area of overlap would be created with any station with which 
the overlap does not now exist.
    (e) The provisions of this section concerning prohibited overlap 
will not apply where the area of such overlap lies entirely over water.

[50 FR 27962, July 9, 1985, as amended at 52 FR 43765, Nov. 16, 1987]



Sec. 73.510  Antenna systems.

    (a) All noncommercial educational stations operating with more than 
10 watts transmitter output power shall be subject to the provisions of 
Sec. 73.316 concerning antenna systems contained in subpart B of this 
part.
    (b) Directional antenna. No application for a construction permit of 
a new station, or change in channel, or change in an existing facility 
on the same channel will be accepted for filing if a directional antenna 
with a maximum-to-minimum ratio of more than 15 dB is proposed.

[42 FR 36829, July 18, 1977]



Sec. 73.511  Power and antenna height requirements.

    (a) No new noncommercial educational station will be authorized with 
less power than minimum power

[[Page 152]]

requirements for commercial Class A facilities. (See Sec. 73.211.)
    (b) No new noncommercial educational FM station will be authorized 
with facilities greater than Class B in Zones I and I-A or Class C in 
Zone II, as defined in Sec. 73.211.
    (c) Stations licensed before December 31, 1984, and operating above 
50 kW in Zones I and I-A, and above 100 kW and in Zone II may continue 
to operate as authorized.

[50 FR 27963, July 9, 1985, as amended at 50 FR 31379, Aug. 2, 1985; 54 
FR 3602, Jan. 25, 1989]



Sec. 73.512  Special procedures applicable to Class D noncommercial educational stations.

    (a) All Class D stations seeking renewal of license for any term 
expiring June 1, 1980, or thereafter shall comply with the requirements 
set forth below and shall simultaneously file an application on FCC Form 
340, containing full information regarding such compliance with the 
provisions set forth below.
    (1) To the extent possible, each applicant shall select a commercial 
FM channel on which it proposes to operate in lieu of the station's 
present channel. The station may select any commercial channel provided 
no objectionable interference, as set forth in Sec. 73.509(b), would be 
caused. The application shall include the same engineering information 
as is required to change the frequency of an existing station and any 
other information necessary to establish the fact that objectionable 
interference would not result. If no commerical channel is available 
where the station could operate without causing such interference, the 
application shall set forth the basis upon which this conclusion was 
reached.
    (2) If a commercial channel is unavailable, to the extent possible 
each applicant should propose operation on Channel 200 (87.9 MHz) unless 
the station would be within 402 kilometers (250 miles) of the Canadian 
border or 320 kilometers (199 miles) of the Mexican border or would 
cause interference to an FM station operating on Channels 201, 202, or 
203 or to TV Channel 6, as provided in Sec. 73.509.
    (3) If a channel is not available under either paragraph (a) (1) or 
(2) of this section, the renewal applicant shall study all 20 
noncommercial educational FM channels and shall propose operation on the 
channel which would cause the least preclusion to the establishment of 
new stations or increases in power by existing stations. Full 
information regarding the basis for the selection should be provided.
    (b) At any time before the requirements of paragraph (a) become 
effective, any existing Class D station may file a construction permit 
application on FCC Form 340 to change channel in the manner described 
above which shall be subject to the same requirements. In either case, 
any license granted shall specify that the station's license is for a 
Class D (secondary) station.
    (c) Except in Alaska, no new Class D applications nor major change 
applications by existing Class D stations are acceptable for filing 
except by existing Class D stations seeking to change frequency. Upon 
the grant of such application, the station shall become a Class D 
(secondary) station.
    (d) Class D noncommercial educational (secondary) stations (see 
Sec. 73.506(a)(2)) will be permitted to continue to operate only so long 
as no interference (as defined in Sec. 73.509) is caused to any TV or 
commercial FM broadcast stations. In the event that the Class D 
(secondary) station would cause interference to a TV or commercial FM 
broadcast station after that Class D (secondary) station is authorized, 
the Class D (secondary) station must cease operation when program tests 
for the TV or commercial FM broadcast station commence. The Class D 
(secondary) station may apply for a construction permit (see 
Sec. 73.3533) to change to another frequency or antenna site where it 
would not cause interference (as defined in Sec. 73.509). If the Class D 
(secondary) station must cease operation before the construction permit 
is granted, an application for temporary authorization (pursuant to 
Sec. 73.3542) to operate with the proposed

[[Page 153]]

facilities may be submitted; where appropriate, such temporary 
authorization can be granted.

[43 FR 39716, Sept. 6, 1978, as amended at 44 FR 48226, Aug. 17, 1979; 
47 FR 28388, June 30, 1982; 50 FR 8326, Mar. 1, 1985]



Sec. 73.513  Noncommercial educational FM stations operating on unreserved channels.

    Noncommercial educational FM stations other than Class D (secondary) 
which operate on Channels 221 through 300 but which comply with 
Sec. 73.503 as to licensing requirements and the nature of the service 
rendered, must comply with the provisions of the following sections of 
subpart B: Secs. 73.201 through 73.213 (Classification of FM Broadcast 
Stations and Allocations of Frequencies) and such other sections of 
subpart B as are made specially applicable by the provisions of this 
subpart C. Stations in Alaska authorized before August 11, 1982, using 
Channels 261-300 need not meet the minimum effective radiated power 
requirement specified in Sec. 73.211(a). In all other respects, stations 
operating on Channels 221 through 300 are to be governed by the 
provisions of this subpart and not subpart B.

[47 FR 30068, July 12, 1982]



Sec. 73.525  TV Channel 6 protection.

    The provisions of this section apply to all applications for 
construction permits for new or modified facilities for a NCE-FM station 
on Channels 200-220 unless the application is accompanied by a written 
agreement between the NCE-FM applicant and each affected TV Channel 6 
broadcast station concurring with the proposed NCE-FM facilities.
    (a) Affected TV Channel 6 Station. (1) An affected TV Channel 6 
station is a TV broadcast station which is authorized to operate on 
Channel 6 that is located within the following distances of a NCE-FM 
station operating on Channels 201-220:

                                 Table A
------------------------------------------------------------------------
                      Distance                             Distance
 NCE-FM channel     (kilometers)      NCE-FM channel     (kilometers)
------------------------------------------------------------------------
         201                265               211                196
         202                257               212                195
         203                246               213                193
         204                235               214                187
         205                225               215                180
         206                211               216                177
         207                196               217                174
         208                196               218                166
         209                196               219                159
         210                196               220                154
------------------------------------------------------------------------

    (2) Where a NCE-FM application has been accepted for filing or 
granted, the subsequent acceptance of an application filed by a relevant 
TV Channel 6 station will not require revision of the pending NCE-FM 
application or the FM station's authorized facilities, unless the 
provisions of paragraph (e)(3) of this section for TV translator or 
satellite stations apply.
    (b) Existing NCE-FM Stations. (1) A NCE-FM station license 
authorized to operate on channels 201-220 as of December 31, 1984, or a 
permittee, granted a construction permit for a NCE-FM station as of 
December 31, 1984, are not subject to this section unless they propose 
either:
    (i) To make changes in operating facilities or location which will 
increase predicted interference as calculated under paragraph (e) of 
this section to TV Channel 6 reception in any direction; or,
    (ii) To increase its ratio of vertically polarized to horizontally 
polarized transmissions.
    (2) Applicants must comply with the provision of paragraphs (c) or 
(d) of this section unless the application for modification demonstrates 
that, for each person predicted to receive new interference as a result 
of the change, existing predicted interference to two person will be 
eliminated. Persons predicted to receive new interference are those 
located outside the area predicted to receive interference from the 
station's currently authorized facilities (``existing predicted 
interference area'') but within the area predicted to receive 
interference from the proposed facilities (``proposed predicted 
interference area''). Persons for whom predicted interference will be 
eliminated are those located within the existing predicted interference 
area and outside

[[Page 154]]

the proposed predicted interference area.
    (i) In making this calculation, the provisions contained at 
paragraph (e) will be used except as modified by paragraph (b)(3) of 
this section.
    (ii) The following adjustment to the population calculation may be 
made: up to 1,000 persons may be subtracted from the population 
predicted to receive new interference if, for each person substracted, 
the applicant effectively installs two filters within 90 days after 
commencing program tests with the proposed facilities and, no later than 
45 days thereafter, provides the affected TV Channel 6 station (as 
defined in paragraph (a) of this section) with a certification 
containing sufficient information to permit verification of such 
installation. The required number of filters will be installed on 
television receivers located within the predicted interference area; 
provided that half of the installations are within the area predicted to 
receive new interference.
    (3) Where an NCE-FM applicant wishes to operate with facilities in 
excess of that permitted under the provisions of paragraphs (c) or (d) 
of this section, by proposing to use vertically polarized transmissions 
only, or to increase its ratio of vertically to horizontally polarized 
transmissions, the affected TV Channel 6 station must be given an option 
to pay for the required antenna and, if it takes that option, the NCE-FM 
vertically polarized component of power will be one half (-3 dB) that 
which would be allowed by the provisions of paragraph (e)(4) of this 
section.
    (4) Applications for modification will include a certification that 
the applicant has given early written notice of the proposed 
modification to all affected TV Channel 6 stations (as defined in 
paragraph (a) of this section).
    (5) Where the NCE-FM station demonstrates in its application that it 
must make an involuntary modification (e.g., due to loss of its 
transmitter site) that would not otherwise be permitted under this 
section, its application will be considered on a case-by-case basis. In 
such cases, the provisions of paragaph (b)(3) of this section do not 
apply.
    (c) New NCE-FM stations. Except as provided for by paragraph (d) of 
this section, applicants for NCE-FM stations proposing to operate on 
Channels 201-220 must submit a showing indicating that the predicted 
interference area resulting from the proposed facility contains no more 
than 3,000 persons.
    (1) In making these calculations, the provisions in paragraph (e) of 
this section will be used.
    (2) The following adjustment to population may be made: up to 1,000 
persons may be subtracted from the population within the predicted 
interference area if, for each person subtracted, the applicant 
effectively installs one filter within 90 days after commencing program 
tests and, no later than 45 days thereafter, provides the affected TV 
Channel 6 station with a certification containing sufficient information 
to permit verification of such installation. The required number of 
filters will be installed on television receivers located within the 
predicted interference area.
    (d) Collocated Stations. As an alternative to the provisions 
contained in paragraphs (b) and (c) of this section, an application for 
a NCE-FM station operating on Channels 201-220 and located at 0.4 
kilometer (approximately 0.25 mile) or less from a TV Channel 6 station 
will be accepted under the following requirements:
    (1) The effective radiated power cannot exceed the following values:

                                 Table B
------------------------------------------------------------------------
 NCE-FM channel    Power (kilowatt)   NCE-FM channel    Power (kilowatt)
------------------------------------------------------------------------
          201               1.1                211              26.3
          202               1.9                212              31.6
          203               3.1                213              38.0
          204               5.0                214              46.8
          205               8.3                215              56.2
          206              10.0                216              67.6
          207              12.0                217              83.2
          208              14.8                218             100.0
          209              17.8                219             100.0
          210              21.4                220             100.0
------------------------------------------------------------------------

    (2) The NCE-FM application will include a certification that the 
applicant has coordinated its antenna with the affected TV station by 
employing either: The same number of antenna bays with radiation centers 
separated by no more than 30 meters (approximately

[[Page 155]]

100 feet) verticially; or, the FM vertical pattern not exceeding the TV 
vertical pattern by more than 2dB.
    (e) Calculation of predicted interference area and population. 
Predictions of interference required under this section and calculations 
to determine the number of persons within a predicted interference area 
for NCE-FM operation on Channels 201-220 are made as follows:
    (1) The predicted interference area will be calculated as follows:
    (i) The distances to the TV Channel 6 field strength contours will 
be predicted according to the procedures specified in Sec. 73.684, 
``Prediction of coverage,'' using the F(50,50) curves in Figure 9, 
Sec. 73.699.
    (ii) For each TV Channel 6 field strength contour, there will be an 
associated F(50,10) FM interference contour, the value of which (in 
units of dBu) is defined as the sum of the TV Channel 6 field strength 
(in dBu) and the appropriate undesired-to-desired (U/D) signal ratio (in 
dB) obtained from Figures 1 and 2, Sec. 73.599, corresponding to the 
channel of the NCE-FM applicant and the appropriate F(50,50) field 
strength contour of the TV Channel 6 station.
    (iii) An adjustment of 6 dB for television receiving antenna 
directivity will be added to each NCE-FM interference contour at all 
points outside the Grade A field strength contour (Sec. 73.683) of the 
TV Channel 6 station and within an arc defined by the range of angles, 
of which the FM transmitter site is the vertex, from 110 deg. relative 
to the azimuth from the FM transmitter site to the TV Channel 6 
transmitter site, counterclockwise to 250 deg. relative to that azimuth. 
At all points at and within the Grade A field strength contour of the TV 
Channel 6 station, the 6 dB adjustment is applicable over the range of 
angles from 70 deg. clockwise to 110 deg. and from 250 deg. clockwise to 
290 deg..
    (iv) The distances to the applicable NCE-FM interference contours 
will be predicted according to the procedures specified in Sec. 73.313, 
``Prediction of Coverage,'' using the proposed antenna height and 
horizontally polarized, or the horizontal equivalent of the vertically 
polarized, effective radiated power in the pertinent direction and the 
F(50,10) field strength curves (Figure 1a, Sec. 73.333).
    (v) The predicted interference area will be defined as the area 
within the TV Channel 6 station's 47 dBu field strength contour that is 
bounded by the locus of intersections of a series of TV Channel 6 field 
strength contours and the applicable NCE-FM interference contours.
    (vi) In cases where the terrain in one or more directions departs 
widely from the surrounding terrain average (for example, an intervening 
mountain), a supplemental showing may be made. Such supplemental 
showings must describe the procedure used and should include sample 
calculations. The application must also include maps indicating the 
predicted interference area for both the regular method and the 
supplemental method.
    (vii) In cases where the predicted interference area to Channel 6 
television from a noncommercial educational FM station will be located 
within the 90 dBu F(50,50) contour of the television Channel 6 station, 
the location of the FM interfering contour must be determined using the 
assumption that the Channel 6 field strength remains constant at 90 dBu 
everywhere within the 90 dBu TV contour. The FM to Channel 6 U/D signal 
strength ratio specified in Sec. 73.599 corresponding to the Channel 6 
TV field strength of 90 dBu shall be used.
    (2) The number of persons contained within the predicted 
interference area will be based on data contained in the most recently 
published U.S. Census of Population and will be determined by plotting 
the predicted interference area on a County Subdivision Map of the state 
published for the Census, and totalling the number of persons in each 
County Subdivision (such as, Minor Civil Division (MCD), Census County 
Division (CCD), or equivalent areas) contained within the predicted 
interference area. Where only a portion of County Subdivision is 
contained within the interference area:
    (i) The population of all incorporated places or Census designated 
places will be subtracted from the County Subdivision population;
    (ii) Uniform distribution of the remaining population over the 
remaining

[[Page 156]]

area of the County Subdivision will be assumed in determining the number 
of persons within the predicted interference area in proportion to the 
share of the remaining area of the County Subdivision that lies within 
the predicted interference area; and,
    (iii) The population of the incorporated places or Census designated 
places contained within the predicted interference area will then be 
added to the total, again assuming uniform distribution of the 
population within the area of each place and adding a share of the 
population proportional to the share of the area if only a portion of 
such a place is within the predicted interference area.
    (iv) At the option of either the NCE-FM applicant or an affected TV 
Channel 6 station which provides the appropriate analysis, more detailed 
population data may be used.
    (3) Adjustments to the population calculated pursuant to paragraph 
(e)(2) of this section may be made as follows:
    (i) If any part of the predicted interference area is within the 
Grade A field strength contour (Sec. 73.683) of a TV translator station 
carrying the affected TV Channel 6 station, the number of persons within 
that overlap area will be subtracted, provided the NCE-FM construction 
permit and license will contain the following conditions:
    (A) When the TV translator station ceases to carry the affected TV 
Channel 6 station's service and the cessation is not the choice of the 
affected TV Channel 6 station, the NCE-FM station will modify its 
facilities, within a reasonable transition period, to meet the 
requirements of this section which would have applied if no adjustment 
to population for translator service had been made in its application.
    (B) The transition period may not exceed 1 year from the date the 
NCE-FM station is notified by the TV Channel 6 station that the 
translator station will cease to carry the affected TV Channel 6 
station's service or 6 months after the translator station ceases to 
carry the affected TV Channel 6 station's service, whichever is earlier.
    (ii) If any part of the interference area is within the Grade B 
field strength contour (Sec. 73.683) of a satellite station of the 
affected TV Channel 6 station, the number of persons within the overlap 
area will be subtracted, provided the NCE-FM permit and license will 
contain the following conditions:
    (A) If the satellite station ceases to carry the affected TV Channel 
6 station's service and the cessation is not the choice of the affected 
TV Channel 6 station, the NCE-FM station will modify its facilities, 
within a reasonable transition period, to meet the requirements of this 
rule which would have applied if no adjustment to population for 
satellite station service had been made in its application.
    (B) The transition period may not exceed 1 year from the date the 
NCE-FM station is notified by the TV Channel 6 station that the 
satellite station will cease to carry the affected TV Channel 6 
stations's service or 6 months after the satellite station ceases to 
carry the affected TV Channel 6 station's service, whichever is earlier.
    (iii) If any part of the predicted interference area is located 
outside the affected TV Channel 6 station's Area of Dominant Influence 
(ADI), outside the Grade A field strength contour (Sec. 73.683), and 
within the predicted city grade field strength contour (73.685(a)) of a 
TV broadcast station whose only network affiliation is the same as the 
only network affiliation of the affected TV Channel 6 station, the 
number of persons within that part will be subtracted. (For purposes of 
this provision, a network is defined as ABC, CBS, NBC, or their 
successors.) In addition, the ADI of an affected TV Channel 6 station 
and the program network affiliations of all relevant TV broadcast 
stations will be assumed to be as they were on the filing date of the 
NCE-FM application or June 1, 1985, whichever is later.
    (iv) In calculating the population within the predicted interference 
area, an exception will be permitted upon a showing (e.g., as survey of 
actual television reception) that the number of persons within the 
predicted interference area should be reduced to account for persons 
actually experiencing co-channel or adjacent channel interference to 
reception of the affected TV Channel 6 station. The area within which 
such a showing may be made

[[Page 157]]

will be limited to the area calculated as follows:
    (A) The distances to the field strength contours of the affected TV 
Channel 6 station will be predicted according to the procedures 
specified in Sec. 73.684, ``Prediction of coverage,'' using the F(50,50) 
curves in Figure 9, Sec. 73.699.
    (B) For each field strength contour of the affected TV Channel 6 
station, there will be an associated co-channel or adjacent channel TV 
broadcast station interference contour, the value of which (in units of 
dBu) is defined as the sum of the affected TV Channel 6 station's field 
strength (in dBu) and the appropriate undesired-to-desired signal ratio 
(in dB) as follows:

Co-channel, normal offset, -22 dB
Co-channel, no offset, -39 dB
Adjacent channel, +12 dB

    (C) The distances to the associated co-channel or adjacent channel 
TV broadcast station interference contour will be predicted according to 
the procedures specified in Sec. 73.684, ``Prediction of coverage,'' 
using the F(50,10) curves in Figure 9a, Sec. 73.699.
    (D) The area within which the showing of actual interference may be 
made will be the area bounded by the locus of intersections of a series 
of the affected TV Channel 6 station's field strength contours and the 
associated interference contours of the co-channel or adjacent channel 
TV broadcast station.
    (4) The maximum permissible effective radiated power (ERP) and 
antenna height may be adjusted for vertical polarity as follows:
    (i) If the applicant chooses to use vertically polarized 
transmissions only, the maximum permissible vertically polarized ERP 
will be the maximum horizontally polarized ERP permissible at the same 
proposed antenna height, calculated without the adjustment for 
television receiving antenna directivity specified in paragraph 
(e)(1)(iii) of this section, multiplied by either: 40 if the predicted 
interference area lies entirely outside the limits of a city of 50,000 
persons or more; or 10 if it does not.
    (ii) If the applicant chooses to use mixed polarity, the permissible 
ERP is as follows:

    [H+(V/A)] is no greater than P
Where:
    H is the horizontally polarized ERP in kilowatts for mixed polarity;
    V is the vertically polarized ERP in kilowatts for mixed polarity;
    A is 40 if the predicted interference area lies entirely outside the 
limits of a city of 50,000 persons or more, or 10 if it does not; and
    P is the maximum permitted horizontally polarized-only power in 
kilowatts.

    (f) Channel 200 Applications. No application for use of NCE-FM 
Channel 200 will be accepted if the requested facility would cause 
objectionable interference to TV Channel 6 operations. Such 
objectionable interference will be considered to exist whenever the 15 
dBu contour based on the F(50,10) curves in Sec. 73.333 Figure 1a would 
overlap the 40 dBu contour based on the F(50,50) curves in Sec. 73.699, 
Figure 9.

[50 FR 27963, July 9, 1985; 50 FR 30187, July 24, 1985; 50 FR 31379, 
Aug. 2, 1985, as amended at 51 FR 26250, July 22, 1986; 52 FR 25867, 
July 9, 1987; 62 FR 51059, Sept. 30, 1997]



Sec. 73.558  Indicating instruments.

    The requirements for indicating instruments described in Sec. 73.258 
are applicable to all educational FM broadcast stations licensed with a 
transmitter power greater than 0.01 kw.

[51 FR 17029, May 8, 1986]



Sec. 73.561  Operating schedule; time sharing.

    (a) All noncommercial educational FM stations will be licensed for 
unlimited time operation except those stations operating under a time 
sharing arrangement. All noncommercial educational FM stations are 
required to operate at least 36 hours per week, consisting of at least 5 
hours of operation per day on at least 6 days of the week; however, 
stations licensed to educational institutions are not required to 
operate on Saturday or Sunday or to observe the minimum operating 
requirements during those days designated on the official school 
calendar as vacation or recess periods.
    (b) All stations, including those meeting the requirements of 
paragraph (a) of this section, but which do not operate 12 hours per day 
each day of the year, will be required to share use of

[[Page 158]]

the frequency upon the grant of an appropriate application proposing 
such share time arrangement. Such applications shall set forth the 
intent to share time and shall be filed in the same manner as are 
applications for new stations. They may be filed at any time, but in 
cases where the parties are unable to agree on time sharing, action on 
the application will be taken only in connection with the renewal of 
application for the existing station. In order to be considered for this 
purpose, such an application to share time must be filed no later than 
the deadline for filing petitions to deny the renewal application of the 
existing licensee, or, in the case of renewal applications filed by the 
existing licensee on or before May 1, 1995, no later than the deadline 
for filing applications in conflict with the such renewal applications.
    (1) The licensee and the prospective licensee(s) shall endeavor to 
reach an agreement for a definite schedule of periods of time to be used 
by each. Such agreement shall be in writing and shall set forth which 
licensee is to operate on each of the hours of the day throughout the 
year. Such agreement shall not include simultaneous operation of the 
stations. Each licensee shall file the same in triplicate with each 
application to the Commission for initial construction permit or renewal 
of license. Such written agreements shall become part of the terms of 
each station's license.
    (2) The Commission desires to facilitate the reaching of agreements 
on time sharing. However, if the licensees of stations authorized to 
share time are unable to agree on a division of time, the Commission 
shall be so notified by statement to that effect filed with the 
application proposing time sharing. Thereafter the Commission will 
designate the application for hearing on any qualification issues 
arising regarding the renewal or new applicants. If no such issues 
pertain, the Commission will set the matter for expedited hearing 
limited solely to the issue of the sharing of time. In the event the 
stations have been operating under a time sharing agreement but cannot 
agree on its continuation, a hearing will be held, and pending such 
hearing, the operating schedule previously adhered to shall remain in 
full force and effect.
    (c) A departure from the regular schedule set forth in a time-
sharing agreement will be permitted only in cases where a written 
agreement to that effect is reduced to writing, is signed by the 
licensees of the stations affected thereby, and is filed in triplicate 
by each licensee with the Commission, Attention: Audio Services 
Division, Mass Media Bureau, prior to the time of the proposed change. 
If time is of the essence, the actual departure in operating schedule 
may precede the actual filing of the written agreement, provided that 
appropriate notice is sent to the Commission in Washington, DC, 
Attention: Audio Services Division, Mass Media Bureau.
    (d) In the event that causes beyond the control of a permittee or 
licensee make it impossible to adhere to the operating schedule in 
paragraphs (a) or (b) of this section or to continue operating, the 
station may limit or discontinue operation for a period not exceeding 30 
days without further authority from the Commission, Provided, That 
notification is sent to the Commission in Washington, DC, Attention: 
Audio Services Division, Mass Media Bureau, no later than the 10th day 
of limited or discontinued operation. During such period, the permittee 
shall continue to adhere to the requirements of the station license 
pertaining to the lighting of antenna structures. In the event normal 
operation is restored prior to the expiration of the 30 day period, the 
permittee or licensee will notify the FCC, Attention: Audio Services 
Division of the date that normal operations resumed. If causes beyond 
the control of the permittee or licensee make it impossible to comply 
within the allowed period, Special Temporary Authority (see Section 
73.1635) must be requested to remain silent for such additional time as 
deemed necessary. The license of a broadcasting station that fails to 
transmit broadcast signals for any consecutive 12 month period expires 
as a matter of law at the end of that period, notwithstanding any 
provision, term, or condition of license to the contrary.


[[Page 159]]


    Note 1: For allocations purposes, both (all) stations sharing time 
will be treated as unlimited time stations.

    Note 2: See Secs. 73.1705, 73.1715, and 73.1740.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[43 FR 39717, Sept. 6, 1978, as amended at 43 FR 45845, Oct. 4, 1978; 44 
FR 3416, Jan. 19, 1979; 44 FR 65764, Nov. 15, 1979; 47 FR 54448, Dec. 3, 
1982; 50 FR 13974, Apr. 9, 1985; 61 FR 18291, Apr. 25, 1996; 61 FR 
28767, June 6, 1996; 63 FR 33877, June 22, 1998]



Sec. 73.567  Determining operating power.

    The procedures for determining operating power described in 
Sec. 73.267 are applicable to noncommercial education FM stations.

[44 FR 58732, Oct. 11, 1979]



Sec. 73.593  Subsidiary communications services.

    The licensee of a noncommercial educational FM station is not 
required to use its subcarrier capacity, but if it chooses to do so, it 
is governed by Secs. 73.293 through 73.295 of the Commission's Rules 
regarding the types of permissible subcarrier uses and the manner in 
which subcarrier operations shall be conducted; Provided, however, that 
remunerative use of a station's subcarrier capacity shall not be 
detrimental to the provision of existing or potential radio reading 
services for the blind or otherwise inconsistent with its public 
broadcasting responsibilities.

[48 FR 26615, June 9, 1983]



Sec. 73.597  FM stereophonic sound broadcasting.

    A noncommercial educational FM broadcast station may, without 
specific authority from the FCC, transmit stereophonic sound programs 
upon installation of stereophonic sound transmitting equipment under the 
provisions of Secs. 2.977, 2.1001, 73.322, and 73.1590 of the FCC's 
Rules.

[51 FR 17029, May 8, 1986]


Sec. 73.599    NCE-FM engineering charts.

[[Page 160]]

[GRAPHIC] [TIFF OMITTED] TC01MR91.091


[[Page 161]]


[GRAPHIC] [TIFF OMITTED] TC01MR91.092

[50 FR 27965, July 9, 1985]

[[Page 162]]

Subpart D  [Reserved]



                Subpart E--Television Broadcast Stations



Sec. 73.601  Scope of subpart.

    This subpart contains the rules and regulations (including 
engineering standards) governing TV broadcast stations, including 
noncommercial educational TV broadcast stations and, where indicated, 
low power TV and TV translator stations in the United States, its 
Territories and possessions. TV broadcast, low power TV, and TV 
translator stations are assigned channels 6 MHz wide, designated as set 
forth in Sec. 73.603(a).

[47 FR 21494, May 18, 1982]



Sec. 73.602  Cross reference to rules in other parts.

    See Sec. 73.1010.

[43 FR 32781, July 28, 1978]



Sec. 73.603  Numerical designation of television channels.

    (a)

------------------------------------------------------------------------
                                                               Frequency
                         Channel No.                          band (MHz)
------------------------------------------------------------------------
2...........................................................       54-60
3...........................................................       60-66
4...........................................................       66-72
5...........................................................       76-82
6...........................................................       82-88
7...........................................................     174-180
8...........................................................     180-186
9...........................................................     186-192
10..........................................................     192-198
11..........................................................     198-204
12..........................................................     204-210
13..........................................................     210-216
14..........................................................     470-476
15..........................................................     476-482
16..........................................................     482-488
17..........................................................     488-494
18..........................................................     494-500
19..........................................................     500-506
20..........................................................     506-512
21..........................................................     512-518
22..........................................................     518-524
23..........................................................     524-530
24..........................................................     530-536
25..........................................................     536-542
26..........................................................     542-548
27..........................................................     548-554
28..........................................................     554-560
29..........................................................     560-566
30..........................................................     566-572
31..........................................................     572-578
32..........................................................     578-584
33..........................................................     584-590
34..........................................................     590-596
35..........................................................     596-602
36..........................................................     602-608
37..........................................................     608-614
38..........................................................     614-620
39..........................................................     620-626
40..........................................................     626-632
41..........................................................     632-638
42..........................................................     638-644
43..........................................................     644-650
44..........................................................     650-656
45..........................................................     656-662
46..........................................................     662-668
47..........................................................     668-674
48..........................................................     674-680
49..........................................................     680-686
50..........................................................     686-692
51..........................................................     692-698
52..........................................................     698-704
53..........................................................     704-710
54..........................................................     710-716
55..........................................................     716-722
56..........................................................     722-728
57..........................................................     728-734
58..........................................................     734-740
59..........................................................     740-746
60..........................................................     746-752
61..........................................................     752-758
62..........................................................     758-764
63..........................................................     764-770
64..........................................................     770-776
65..........................................................     776-782
66..........................................................     782-788
67..........................................................     788-794
68..........................................................     794-800
69..........................................................     800-806
------------------------------------------------------------------------

    (b) In Alaska, television broadcast stations operating on Channel 5 
(76-82 MHz) and on Channel 6 (82-88 MHz) shall not cause harmful 
interference to and must accept interference from non-Government fixed 
operations authorized prior to January 1, 1982.
    (c) Channel 37, 608-614 MHz is reserved exclusively for the radio 
astronomy service.
    (d) In Hawaii, the frequency band 488-494 MHz is allocated for non-
broadcast use. This frequency band (Channel 17) will not be assigned in 
Hawaii for use by television broadcast stations.

[28 FR 13660, Dec. 14, 1963, as amended at 35 FR 11179, July 11, 1970; 
39 FR 10576, Mar. 21, 1974; 47 FR 16789, Apr. 20, 1982; 47 FR 30068, 
July 12, 1982; 47 FR 35989, Aug. 18, 1982; 51 FR 18450, May 20, 1986]



Sec. 73.606  Table of allotments.

    (a) General. The following table of allotments contains the channels 
designated for the listed communities in the United States, its 
Territories, and possessions. Channels designated with

[[Page 163]]

an asterisk are assigned for use by noncommercial educational broadcast 
stations only. A station on a channel identified by a plus or minus mark 
is required to operate with its carrier frequencies offset 10 kHz above 
or below, respectively, the nominal carrier frequencies.
    (b) Table of Allotments.

                                 Alabama
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anniston..................................  40-
Arab......................................  56-
Bessemer..................................  17
Birmingham................................  6-, *10-, 13-, 21-, 42+,
                                             *62+, 68-
Decatur...................................
Demopolis.................................  *41
Dothan....................................  4, 18, *39+, 60-
Dozier....................................  *2-
Florence..................................  15, 26, *36-
Gadsden...................................  44+, 60
Gulf Shores...............................  55
Huntsville................................  19, *25+, 31+, 48-
Huntsville-Decatur........................  54
Louisville................................  *43+
Mobile....................................  5+, 10+, 15+, 21+, *31, *42,
                                             and 61
Montgomery................................  12, 20, *26+, 32, 45-, *63
Mount Cheaha..............................  *7-
Munford...................................  *16-
Opelika...................................  50, 66
Ozark.....................................  34
Selma.....................................  8, 29-
Troy......................................  67
Tuscaloosa................................  23-, 33, *39-
Tuscumbia.................................  52+
Tuskegee..................................  22-
------------------------------------------------------------------------


                                 Alaska
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anchorage.................................  2-, 4-, 5, *7-, *9, 11, 13-,
                                             and 33
Bethel....................................  *4
Dillingham................................  *2, 10
Fairbanks.................................  2+, 7+, *9+, 11+, 13+
Juneau....................................  *3, 8, 10
Ketchikan.................................  2, 4, *9
North Pole................................  4+
Seward....................................  3-,
Sitka.....................................  13
------------------------------------------------------------------------


                                 Arizona
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ajo.......................................  *23-
Coolidge..................................  *43
Douglas...................................  3, *28
Flagstaff.................................  2, 4+, 9, 13, and *16
Globe.....................................  *14+
Green Valley..............................  46
Holbrook..................................  11+, *18+
Kingman...................................  6-, *14-
Lake Havasu City..........................  34+
McNary....................................  *22+
Mesa......................................  12-
Nogales...................................  *16+
Page......................................  *17
Parker....................................  *17-
Phoenix...................................  3+, 5-, *8+, 10-, 15-, 21,
                                             33, *39, 45, 61
Prescott..................................  7, *19
Safford...................................  *23+
Sierra Vista..............................  58
Tolleson..................................  51
Tucson....................................  4-, *6+, 9-, 13-, 18-, *27-,
                                             40
Tucson-Nogales............................  \2\ 11
Yuma......................................  11-, 13+, *16-
------------------------------------------------------------------------


                                Arkansas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Arkadelphia...............................  *9+
Camden....................................  237A, 246, 49-
Cimarron..................................  23
El Dorado.................................  10-, *30+, 43-
Eureka Springs............................  34+
Fayetteville..............................  *13-, 36
Fort Smith................................  5-, 24+, 40-
Gosnell...................................  46
Harrison..................................  31+
Hot Springs...............................  *20, 26
Jonesboro.................................  8-, *19+, 48+
Little Rock...............................  *2-, 4, 7-, 11, 16-, *36,
                                             and 42
Mountain Home.............................  43+
Mountain View.............................  *6-
Newark....................................  *17
Pine Bluff................................  25-, 38-
Rogers....................................  51-
Russellville..............................  *28+
Springdale................................  57
------------------------------------------------------------------------


                               California
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alturas...................................  13+
Anaheim...................................  56-
Arcata....................................  23
Avalon....................................  54
Bakersfield...............................  17, 23-, 29, *39-, 45, 65+
Barstow...................................  *35+, 64
Big Bear Lake.............................  59+
Bishop....................................  *14-, 20+
Blythe....................................  *22-
Brawley...................................  *26
Calipatria................................  54
Ceres.....................................  *23+
Chico.....................................  12-, *18, 24+, *46-
Clovis....................................  43
Coalinga..................................  *27-
Concord...................................  42
Corona....................................  52
Cotati....................................  *22-
El Centro.................................  7+, 9+
Eureka....................................  3-, 6-, *13-, and 29
Fort Bragg................................  8-
Fresno....................................  *18+, 24, 30+, 47, 53,
Hanford...................................  21
Huntington Beach..........................  *50-
Indio.....................................  *19+
Long Beach................................  18-
Los Angeles...............................  2, 4, 5, 7, 9, 11, 13, 22,
                                             *28, 34, *58-, *68-
Merced....................................  51

[[Page 164]]

 
Modesto...................................  19-
Novato....................................  68
Oakland...................................  2+
Ontario...................................  46
Oroville..................................  28
Oxnard....................................  63+
Palm Springs..............................  36-, 42
Paradise..................................  30
Porterville...............................  61
Rancho Palos Verdes.......................  44+
Redding...................................  7, *9, 16
Ridgecrest................................  *25
Riverside.................................  62
Sacramento................................  3, *6, 10, 29-, 31-, 40-,
                                             *52
Salinas-Monterey..........................  8+, 35-, 46-, *56, 67-
San Bernardino............................  *24-, 30
San Diego.................................  8, 10, *15, 39, 51, 69
San Francisco.............................  4-, 5+, 7-, *9+, 14+, 20-,
                                             26-, *32+, 38, 44-
San Jose..................................  11+, 36, 48-, *54, 65
San Luis Obispo...........................  6+, *15+, and 33
San Mateo.................................  *60
Sanger....................................  59
Santa Anna................................  40,
Santa Barbara.............................  3-, 14,1 *20,1 , 38, and *55
Santa Cruz................................  *16-
Santa Maria...............................  12+, 42+
Santa Rosa................................  50-, *62
Stockton..................................  13+, 58, 64
Susanville................................  *14
Twentynine Palms..........................  31
Vallejo-Fairfield.........................  66
Ventura...................................  57
Visalia...................................  26+, *49
Watsonville...............................  *25+
Weaverville...............................  32
Willits...................................  11-
Yosemite Valley...........................  41
Yreka City................................  *20+
------------------------------------------------------------------------


                                Colorado
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alamosa...................................  *16, 47
Boulder...................................  14
Broomfield................................  *12
Castle Rock...............................  53
Colorado Springs..........................  11, 13, 21
Craig.....................................  *16+
Denver....................................  2, 4-, *6-, 7, 9-, 20, 31,
                                             *41, 50, 59
Durango...................................  6+, *20-, and 33+
Fort Collins..............................  22-
Glenwood Springs..........................  3-, *19+
Grand Junction............................  5-, 8-, *18+, 4*, 11+
Gunnison..................................  *17-
La Junta..................................  *22+
Lamar.....................................  12-, *14-
Leadville.................................  *15-
Longmont..................................  25
Montrose..................................  10+, *22
Pueblo....................................  5, *8, 26+, 32-
Salida....................................  *23+
Steamboat Springs.........................  24+
Sterling..................................  3, *18+
Trinidad..................................  *24
------------------------------------------------------------------------


                               Connecticut
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Bridgeport................................  43-, *49-
Hartford..................................  3+, 18-, *24, 61+
New Britain...............................  30+
New Haven.................................  8, 59+, 55
New London................................  26+
Norwich...................................  *53
Waterbury.................................  20
------------------------------------------------------------------------


                                Delaware
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Dover.....................................  *34
Seaford...................................  38, *64
Wilmington................................  *12, 61
------------------------------------------------------------------------


                          District of Columbia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Washington................................  4-, 5-, 7+, 9, 20+, *26-,
                                             *32+, 50
------------------------------------------------------------------------


                                 Florida
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Boca Raton................................  *63
Bradenton.................................  *19, 66
Bunnell...................................  58
Cape Coral................................  36
Clearwater................................  22
Clermont..................................  18-
Cocoa.....................................  *52, 68
Crystal River.............................  39-
Daytona Beach.............................  2-, 26
Destin....................................  64+
Fort Lauderdale...........................  51
Fort Myers................................  11+, 20+, *30
Fort Pierce...............................  *21-, 34
Fort Walton Beach.........................  35, 53, 58
Gainesville...............................  *5-, 20, 61+
High Springs..............................  53+
Hollywood.................................  69
Inverness.................................  64
Islamorada................................  *9+
Jacksonville..............................  4+, *7, 12+, 17, 30+, 47-,
                                             *59
Kenansville...............................  31
Key West..................................  8, *13, and 22+
Lake City.................................  *41
Lake Worth................................  67
Lakeland..................................  32
Leesburg..................................  *45-, 55
Live Oak..................................  57-
Madison...................................  *36-
Marathon..................................  16+
Marianna..................................  *16+, 51
Melbourne.................................  43+, 56
Miami.....................................  *2, 4, 6, 7-, 10+, *17-, 23-
                                             , 33, 35, 39, and 45+
Naples....................................  26-, 46
New Smyrna Beach..........................  *15+
Ocala.....................................  *29, 51-
Orange Park...............................  25-
Orlando...................................  6-, 9, * 24-, 27, 35+, and
                                             65
Palatka...................................  *42, 63+
Palm Beach................................  61
Panama City...............................  7+, 13, 28-, *56, 46
Panama City Beach.........................  46
Pensacola.................................  3-, *23, 33+, 44
St. Petersburg............................  10-, 38, 44+

[[Page 165]]

 
Sarasota..................................  40
Sebring...................................  *48, 60
Stuart....................................  59
Tallahassee...............................  *11-, 24, 27+, 40+
Tampa.....................................  *3, 8-, 13-, *16, 28, and 50
Tequesta..................................  25
Tice......................................  49
Venice....................................  62
West Palm Beach...........................  5, 12, 29+, *42+,
------------------------------------------------------------------------


                                 Georgia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albany....................................  10, 19-, 31-, and 52-
Ashburn...................................  *23+
Athens....................................  *8-, 34
Atlanta...................................  2, 5-, 11+, 17-, *30, 36, 46-
                                             , *57+, 69
Augusta...................................  6+, 12-, 26, 54-
Bainbridge................................  49
Baxley....................................  34
Brunswick.................................  21+
Carrollton................................  *49-
Carnesville...............................  *52
Cedartown.................................  *65-
Chatsworth................................  *18-
Cochran...................................  *29+
Columbus..................................  3, 9+, *28, 38+, *48, 54+
Cordele...................................  55+
Dalton....................................  23
Dawson....................................  *25
Draketown.................................  *27-
Elberton..................................  *60+
Flintstone................................  *41-
Lafayette.................................  *35
Macon.....................................  13+, 24+, 41+, *47+, 64-
Monroe....................................  63
Pelham....................................  *14-
Perry.....................................  58+
Rome......................................  14+
Royston...................................  *22+
Savannah..................................  3, *9-, 11, 22,
Thomasville...............................  6
Toccoa....................................  32-, *68-
Valdosta..................................  *33, 44-
Vidalia...................................  *18+
Warm Springs..............................
Warner Robbins............................  35-
Waycross..................................  *8+
Wrens.....................................  *20-
Young Harris..............................  *51-
------------------------------------------------------------------------


                                 Hawaii
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Hilo (Hawaii).............................  2, *4, 9, 11, 13, 14+, 20+,
                                             26+, *32+, *38+
Honolulu (Oahu)...........................  2+, 4-, 5, 9-, *11+, 13-,
                                             14, 20, 26, 32, *38, and
                                             *44.
Kailua....................................  50
Kailua-Kona (Hawaii)......................  6
Kaneohe...................................  66+
Lihue (Kauai).............................  3+, *8-, 10+, 12-, 15-, *21-
                                             , *27-, *67
Wailuku (Maui)............................  3, 7, *10, 12, 15, 21, *27,
                                             *33, 39
Waimanalo.................................  56
------------------------------------------------------------------------


                                  Idaho
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Boise.....................................  2, *4+, 7, 14
Burley....................................  *17+
Caldwell..................................  9-
Coeur d'Alene.............................  *26+
Filer.....................................  *19-
Grangeville...............................  *15-
Idaho Falls...............................  3, 8+, 20, *33+
Lewiston..................................  3-
Moscow....................................  *12-
Nampa.....................................  6, 12+
Preston...................................  *28
Pocatello.................................  6-, *10, 15, 25+, 31-
Sandpoint.................................  *16+
Sun Valley................................  5-
Twin Falls................................  11, *13-, 35
Weiser....................................  *17
------------------------------------------------------------------------


                                Illinois
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aurora....................................  60
Bloomington...............................  43
Carbondale................................  *8
Champaign.................................  3+, 15-
Charleston................................  *51+
Chicago...................................  2-, 5, 7, 9+, *11, *20, 26,
                                             32, 38-, 44
Danville..................................  68
Decatur...................................  17, 23-
DeKalb....................................  *33, *48-
East St. Louis............................  46
Edwardsville..............................  *18-
Elgin.....................................  \4\ 66+
Freeport..................................  23, *65-
Galesburg.................................  67
Harrisburg................................  3
Jacksonville..............................  *14
Joliet....................................  \1\ 14-, 66+
Kankakee..................................  *54-
LaSalle...................................  35
Macomb....................................  *22+
Marion....................................  27
Moline....................................  8, *24-
Mount Vernon..............................  13+
Olney.....................................  *16-
Paris.....................................  46+
Peoria....................................  19, 25+, 31+, *47-, 59+
Pontiac...................................  53
Quincy....................................  10-, 16+, *27+
Rockford..................................  13, 17+, 39
Rock Island...............................  4+
Springfield...............................  20+, 49-, 55+, *65+
Streator..................................  *63
Urbana....................................  *12-, 27-
Vandalia..................................  *21
------------------------------------------------------------------------


                                 Indiana
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anderson..................................  67+
Angola....................................  63
Bloomington...............................  4, *30-, 42+ and 63+
Elkhart...................................  28+
Evansville................................  7, *9+, 14-, 25-, and 44
Fort Wayne................................  15+, 21+, 33-, *39-, 55
Gary......................................  50, *56+
Hammond...................................  62+
Indianapolis..............................  6, 8-, 13-, *20-, 40, 59-,
                                             *69

[[Page 166]]

 
Kokomo....................................  29-
Lafayette.................................  18, *24
Madison...................................  *60+
Marion....................................  23
Muncie....................................  49, *61
Richmond..................................  43+
Salem.....................................  58+
South Bend................................  16, 22, *34-, 46
Terre Haute...............................  2+, 10, *26-, 38
Vincennes.................................  *22-
------------------------------------------------------------------------


                                  Iowa
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ames......................................  5, 23-, *34+
Burlington................................  26-, *57-
Carroll...................................  *18-, 30+, and 52
Cedar Rapids..............................  2, 9-, 28+, and 48-
Centerville...............................  *31-
Council Bluffs............................  *32
Davenport.................................  6+, 18+, 30-, *36+
Decorah...................................  *14+
Des Moines................................  8-, *11+, 13-, 17+, *43-, 63-
                                             , 69
Dubuque...................................  16-, *29-, 40-
Estherville...............................  *49+
Fort Dodge................................  *21
Fort Madison..............................  *38+
Hampton...................................  50
High Point................................  *14-
Iowa City.................................  *12+, 20-
Keokuk....................................  *44+
Keosauqua.................................  *54+
Lansing...................................  *41+
Mason City................................  3+, *24+
Mount Ayr.................................  *25-
Newton....................................  39+
Ottumwa...................................  15+, *33-
Red Oak...................................  *36
Rock Rapids...............................  *25+
Sibley....................................  *33
Sioux City................................  4-, 9, 14, *27-, 44
Spirit Lake...............................  *38
Waterloo..................................  7+, 22-, *32-
------------------------------------------------------------------------


                                 Kansas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Chanute...................................  *30+
Cimarron..................................  23
Colby.....................................  4
Columbus..................................  *48-
Dodge City................................  *21-
Emporia...................................  *25+
Ensign....................................  6+
Fort Scott................................  20+
Garden City...............................  11+, 13-, *18
Goodland..................................  10
Great Bend................................  2
Hays......................................  7-, *9
Hoisington................................  14
Hutchinson................................  *8, 12, 36+
Junction City.............................  31
Lakin.....................................  *3
Lawrence..................................  38
Liberal...................................  5+
Manhattan.................................  *21
Oakley....................................  *15-
Parsons...................................  *39
Phillipsburg..............................  *22-
Pittsburg.................................  7+ and 14
Pratt.....................................  *32+
Randall...................................
Salina....................................  18+, 34-, 44
Sedan.....................................  *28
Topeka....................................  *11, 13+, 27, 43, 49
Wichita...................................  3-, 10-, *15+, 24-, 33, *42
------------------------------------------------------------------------


                                Kentucky
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ashland...................................  *25, 50-, 61+
Beattyville...............................  65
Blanco....................................  52+
Bowling Green.............................  13, *24-, 40+, *53-, 59+
Campbellsville............................  34
Covington.................................  *54+
Danville..................................  56
Elizabethtown.............................  *23+
Harlan....................................  44-
Hazard....................................  *35+, 57-
Hopkinsville..............................  51
Lexington.................................  18+, 27-, 36, *46, 62
Louisville................................  3-, 11, *15, 21-, 32-, 41+,
                                             *68+
Madisonville..............................  19-, *35-, and 57+
Morehead..................................  *38+, 67-
Murray....................................  *21+, 38
Newport...................................  19+
Owensboro.................................  31-, 48, 61+
Owenton...................................  *52+
Paducah...................................  6+, 29 and 49
Paintsville...............................  69+
Pikeville.................................  *22-, 51+
Somerset..................................  16, *29+
------------------------------------------------------------------------


                                Louisiana
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alexandria................................  5, *25+, 31+, 41+
Baton Rouge...............................  2, 9-, *27+, 33-, and 44+
Columbia..................................  11+
De Ridder.................................  *23-
Hammond...................................  62+
Houma.....................................  11
Lafayette.................................  3+, 10, 15, *24
Lake Charles..............................  7-, *18-, 29-
Minden....................................  21+
Monroe....................................  8+, *13,
Morgan City...............................  *14+
Natchitoches..............................  *20+
New Iberia................................  36-
New Orleans...............................  4+, 6, 8-, * 12, 20-, 26, *
                                             32+, 38+, and 49
Shreveport................................  3-, 12, *24-, 33, and 45+
Slidell...................................  54+
Tallulah..................................  *19
West Monroe...............................  14-, 39+
------------------------------------------------------------------------


                                  Maine
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Augusta...................................  *10-
Bangor....................................  2-, 5+, 7-
Biddeford.................................  *26-
Calais....................................  *13-
Fort Kent.................................  *46+

[[Page 167]]

 
Fryeburg..................................  *18+
Houlton...................................  *25+
Kittery...................................  *39
Lewiston..................................  35-
Millinocket...............................  *44-
Orono.....................................  *12-
Poland Spring 8-..........................
Portland..................................  6-, 13+, 51
Presque Isle..............................  8, *10+, 62+
Rumford...................................  *43+
Waterville................................  23-
------------------------------------------------------------------------


                                Maryland
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Annapolis.................................  *22+
Baltimore.................................  2+, 11-, 13+, 24+, 45, 54,
                                             *67-
Cumberland................................  52+, 65
Frederick.................................  *62
Hagerstown................................  25-, *31, and 68+
Oakland...................................  *36+
Salisbury.................................  16+, *28-, 47-
Waldorf...................................  *58+
------------------------------------------------------------------------


                              Massachusetts
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Adams.....................................  19
Boston....................................  *2+, 4+, 5-, 7+, 25+, 38,
                                             *44, 68+
Cambridge.................................  56
Greenfield................................  32+
Lawrence..................................  62
Marlborough...............................  66
New Bedford...............................  6+, 28-, *34
North Adams...............................  *35
Norwell...................................  46+
Pittsfield................................  51+
Springfield...............................  22, 40, *57+
Vineyard Haven............................  58+
Worcester.................................  14, \1\ 27, *48+,
------------------------------------------------------------------------


                                Michigan
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alpena....................................  *6, 11
Ann Arbor.................................  31+, *58+
Bad Axe...................................  * 15-, 41-
Battle Creek..............................  41+, and 43-
Bay City..................................  5-, 61+
Cadillac..................................  9, *27, 33
Calumet...................................  5-, *22-
Cheboygan.................................  4+
Detroit...................................  2+, 4, 7-, 20+, 50-, *56, 62
East Lansing..............................  *23-, *69-
Escanaba..................................  3+
Flint.....................................  12-, *28-, 66-
Grand Rapids..............................  8+, 13+, 17-, *35+
Iron Mountain.............................  8-, *17+
Ironwood..................................  *15-, 24+
Ishpeming.................................  10
Jackson...................................  18+
Kalamazoo.................................  3-, *52+, 64
Lansing...................................  6-, 47, 53-
Manistee..................................  *21
Manistique................................  *15+
Marquette.................................  6-, *13, 19
Mount Clemens.............................  38+
Mount Pleasant............................  *14
Muskegon..................................  54+
Onondaga..................................  10-
Petoskey..................................  *23+
Port Huron................................  46+
Saginaw...................................  25-, 49-
Sault Ste. Marie..........................  8, 10+, *32-
Traverse City.............................  7+, 29-
University Center *19+....................
Vanderbilt................................  45
West Branch...............................  *24
------------------------------------------------------------------------


                                Minnesota
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alexandria................................  7, * 24, and 42
Appleton..................................  *10-
Austin....................................  6-, *15-
Bemidji...................................  *9, 26+
Brainerd..................................  *22
Crookston.................................  *33
Duluth....................................  3, *8, 10+, 21+, 27-
Ely.......................................  *17-
Fairmont..................................  *16+
Hibbing...................................  13-, *18-
International Falls.......................  11, *35+
Mankato...................................  12, *26-
Marshall..................................  *30-
Minneapolis-St. Paul......................  *2-, 4, 5-, 9+, 11-, *17,
                                             23+, 29+, and 45
Redwood Falls.............................  43
Rochester.................................  10, 47-
St. Cloud.................................  19, *25-, 41
St. James.................................  32+
Thief River Falls.........................  10, *30
Wadena....................................  *20-
Walker....................................  12-, 38-
Wilmar....................................  *14-
Winona....................................  *35+, 44-
Worthington...............................  *20
------------------------------------------------------------------------


                               Mississippi
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Biloxi....................................  13+, *19+,
Booneville................................  *12-
Bude......................................  *17+
Clarksdale................................  *21
Cleveland.................................  *31-
Columbia..................................  *45
Columbus..................................  4-, *43
Greenville................................  15-, 44
Greenwood.................................  6+, *23+
Gulfport..................................  25-
Grenada...................................  22+
Hattiesburg...............................  22, *47
Holly Springs.............................  40
Houston...................................  45+
Jackson...................................  3, 12+, 16, *29+, 40+, and
                                             51
Laurel....................................  7, 18+
Magee.....................................  34+
Meridian..................................  11-, *14, 24-, 30-
Mississippi State.........................  *2+
Natchez...................................  *42+, 48
Oxford....................................  *18
Senatobia.................................  *34-

[[Page 168]]

 
Tupelo....................................  9-, 35+
Vicksburg.................................  35-
West Point................................  27
Wiggins...................................  43-,56+
Yazoo City................................  *32-
------------------------------------------------------------------------


                                Missouri
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Birchtree.................................  *20-
Bowling Green.............................  *35+
Cape Girardeau............................  12, 23, *39-
Carrollton................................  *18
Columbia..................................  8+, 17-*23+
Flat River................................  *22
Hannibal..................................  7-
Jefferson City............................  13, 25, *36-
Joplin....................................  12+, 16, *26-
Kansas City...............................  4, 5+, 9+, *19+, 29, 41-, 50-
                                             , 62+, *68-
Kennett...................................  58+
King City.................................  *28-
Kirksville................................  3-
LaPlata...................................  *21+
Lowry City................................  *15-
Poplar Bluff..............................  15+, *26+, 55
Rolla.....................................  *28
St. Joseph................................  2-, 16-, 22
St. Louis.................................  2, 4-, 5-, *9, 11-, 24+,
                                             30+, *40-, *46
Sedalia...................................  6
Sikeston..................................  45
Springfield...............................  3+, 10, *21-, 27-, 33--
------------------------------------------------------------------------


                                 Montana
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anaconda..................................  2+
Billings..................................  2-, 6, 8, *11, 14, 20+
Bozeman...................................  7-, *9
Butte.....................................  *2+, 4, 6+, 18, 24
Cut Bank..................................  *14-
Dillon....................................  *14+
Glendive..................................  5+, 13+, *16-
Great Falls...............................  3+, 5+, 16, 26, *32
Hardin....................................  4+
Havre.....................................  9+, 11-, and *18-
Helena....................................  10+, 12, *15+
Joplin....................................  35-, 48, 54-
Kalispell.................................  9-, *29-
Lewistown.................................  13
Miles City................................  3-, *10
Missoula..................................  8-, *11+, 13-, 17-, and 23-
Wolf Point................................  *17+
------------------------------------------------------------------------


                                Nebraska
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albion....................................  18, *21+, 24+
Alliance..................................  *13-
Bassett...................................  *7-
Beatrice..................................  23+
Falls City................................  *24
Grand Island..............................  11-, 17
Hastings..................................  5-, *29+
Hayes Center..............................  6
Hay Springs-Scottsbluff...................  4+
Kearney...................................  13
Lexington.................................  *3+
Lincoln...................................  8+, 10+, *12-, 45, 51
McCook....................................  8-, 16+, 12
Merriman..................................  *12
Norfolk...................................  *19+
North Platte..............................  235, 246, 278
Omaha.....................................  3, 6+, 7, 15, *26, 42+, *48-
                                             , and 54
Orchard...................................  16
Pawnee....................................  33+
Scottsbluff...............................  10-, 16
Superior..................................  4+
------------------------------------------------------------------------


                                 Nevada
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Elko......................................  10-, *14+
Ely.......................................  3-, 6+
Fallon....................................  *25
Goldfield.................................  7-
Henderson.................................  5+
Las Vegas.................................  3, 8-, *10+, 13-, 15+, 21+,
                                             and 33+
McGill....................................  *13
Paradise..................................  39+
Pawnee City...............................  *33+
Reno......................................  2, 4, *5, 8, 11, 21+, and
                                             27+
Tonopah...................................  9-, *17+
Winnemucca................................  7+, *15-
Yerington.................................  *16+
------------------------------------------------------------------------


                              New Hampshire
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Berlin....................................  *40-
Concord...................................  21+
Derry.....................................  50-
Durham....................................  *11
Hanover...................................  *15+
Keene.....................................  *52+
Littleton.................................  *49+
Manchester................................  9-,
Merrimack.................................  60+
Portsmouth................................  \1\ 17-
------------------------------------------------------------------------


                               New Jersey
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Atlantic City.............................  *36, 53+, 62-
Burlington................................  48-
Camden....................................  *23+
Linden-Newark.............................  47+
Montclair.................................  *50+
Newark....................................  13-, 68
New Brunswick.............................  *58
Newton....................................  63
Paterson..................................  41-
Secaucus..................................  9+
Trenton...................................  *52-
Vineland..................................  59-, 65-
West Milford..............................  *66-
Wildwood..................................  40
------------------------------------------------------------------------


[[Page 169]]


                               New Mexico
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Alamogordo................................  *18-
Albuquerque...............................  4+, *5+, 7+, 13+, 14-, 23-,
                                             *32+, 41, 50
Carlsbad..................................  6-, *15+, 25-
Clayton...................................  *17
Clovis....................................  12--
Deming....................................  *16
Farmington................................  3, 12+, *15+
Gallup....................................  *8-, 10
Hobbs.....................................  29+
Las Cruces................................  *22-, 48+
Lovington.................................  *19
Portales..................................  *3+
Raton.....................................  *18-
Roswell...................................  8, 10-, 21-, 27-, *33+
Santa Fe..................................  2+, *9+, 11-, 19-
Silver City...............................  6, 10+, *12
Socorro...................................  *15-
Tucumcari.................................  *15
------------------------------------------------------------------------


                                New York
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Albany-Schenectady........................  6, 10-, 13, *17+, 23-, *29+,
                                             45
Amsterdam.................................  *39+, 55
Arcade....................................  62-
Batavia...................................  51-
Bath......................................  14-
Binghamton................................  12-, 34, 40-, *46+
Buffalo...................................  2, 4, 7+, 17, *23, 29-, 49-
Carthage..................................  7-
Corning...................................  *30, 48+
Elmira....................................  18+, 36-
Garden City...............................  *21-
Glens Falls...............................  *58-
Ilion.....................................  67-
Ithaca....................................  52, *65+
Jamestown.................................  26+, *46
Kingston..................................  62+
Lake Placid...............................  *34+
New York..................................  2, 4, 5+, 7, 11+, *25, 31-
North Pole................................  5
Norwood...................................  *18
Oneonta...................................  \1\ 15, *42
Plattsburg................................  *57
Poughkeepsie..............................  54+
Riverhead.................................  55+
Rochester.................................  8, 10+, 13-, *21, 31+, *61+
Saranac Lake..............................  61-
Smithtown.................................  67
Springville...............................  67+
Syracuse..................................  3-, 5-, 9-, *24+, 43+, 56+,
                                             68-
Utica.....................................  2-, 4-, 20+, 33, *59
Watertown.................................  *16, 50+
Waverly...................................  *57-
------------------------------------------------------------------------


                             North Carolina
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Andrews...................................  *59
Asheville.................................  13-, 21+, *33, 62+
Belmont...................................  46+
Bryson City...............................  *67
Burlington................................  16
Canton....................................  *27
Chapel Hill...............................  *4+
Charlotte.................................  3, 9+, 18, 36, *42+
Columbia..................................  *2
Concord...................................  *58
Cullowhee.................................  50+
Durham....................................  11+, 28+
Fayetteville..............................  40+, 62
Forest City...............................  66+
Franklin..................................  *56+
Goldsboro.................................  17-
Greensboro................................  2-, 48-, 61
Greenville................................  9-, 14, *25, and 38+
Hickory...................................  14-
High Point................................  8-, *32+, 67+
Jacksonville..............................  *19, 35
Kannapolis................................  64-
Laurel Hill...............................  59+
Lexington.................................  20
Linville..................................  *17
Lumberton.................................  *31
Manteo....................................  4
Morehead City.............................  8+
Morganton.................................  23-
New Bern..................................  12+
Raleigh...................................  5, 22, *34, 50+
Roanoke Rapids............................  *36-
Rockingham................................  *53
Rocky Mount...............................  47+
Washington................................  7
Waynesville...............................  59
Wilmington................................  3-, 6, 26-, *39-
Wilson....................................  30-
Winston-Salem.............................  12, *26+, 45
------------------------------------------------------------------------


                              North Dakota
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Bismarck..................................  *3, 5, 12-, 17-, 26+
Devils Lake...............................  8+, *22+
Dickinson.................................  2+, *9-, 7
Ellendale.................................  *19-
Fargo.....................................  6, 11+, *13, 15-
Grand Forks...............................  *2, 14+, 27+
Jamestown.................................  7-, *23
Minot.....................................  *6+, 10-, 13-, 14-, 24
Pembina...................................  12
Valley City...............................  4-
Williston.................................  *4, 8-, 11-, *15-
------------------------------------------------------------------------


                                  Ohio
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Akron.....................................  23+, *49+, 55-
Alliance..................................  *45+
Ashtabula.................................  \1\ 15
Athens....................................  20*, 63-
Bowling Green.............................  *27+
Cambridge.................................  *44-
Canton....................................  17-, 67
Chillicothe...............................  53
Cincinnati................................  5-, 9, 12, *48-, 64-
Cleveland.................................  3, 5+, 8, *25+, 61
Columbus..................................  4-, 6+, 10+, 28-, *34, *56-
Dayton....................................  2, 7+, *16+, 22+, 45
Defiance..................................  65+
Hillsboro.................................  *24+, 55+
Lima......................................  35-, 44+, *57+, 17
Lorain....................................  43
Mansfield.................................  *47+, 68-

[[Page 170]]

 
Newark....................................  *31-, 51
Oxford....................................  *14+
Portsmouth................................  30, *42-
Sandusky..................................  52
Shaker Heights 19.........................
Springfield...............................  26+, *66
Steubenville..............................  9+, *62+
Toledo....................................  11-, 13, 24-, *30+, 36-, and
                                             40-
Xenia.....................................  32
Youngstown................................  21-, 27, 33, *58
Zanesville................................  18-
------------------------------------------------------------------------


                                Oklahoma
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Ada.......................................  10+, *22
Altus.....................................  *27
Ardmore...................................  *17, *28-
Bartlesville..............................  17+
Cheyenne..................................  12+
Claremore.................................  *35
Duncan....................................  40+
Elk City..................................  *15-, and 31
Enid......................................  20-, *26+
Eufaula...................................  *3
Grove.....................................  45+
Guymon....................................  9+, *16
Hugo......................................  42+, \1\ *15+, *48+
Lawton....................................  7+, *36-, 16-, 45
McAlester.................................  *32-
Miami.....................................  *18-
Muskogee..................................  19
Norman....................................  46-
Oklahoma City.............................  4-, 5, 9-, *13, 14-, 25-, 34-
                                             , 43+, 52, and 62+
Okmulgee..................................  44-
Sayre.....................................  8+
Shawnee...................................  30
Tulsa.....................................  2+, 6+ 8-, *11-, 23, 41+,
                                             47, 53, and *63
Woodward..................................  *17-, 35+
------------------------------------------------------------------------


                                 Oregon
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Astoria...................................  *21
Bend......................................  *3+, *15, 21+
Brookings.................................  *14-
Burns.....................................  *18
Coos Bay..................................  11, 23+, 41
Corvallis.................................  *7-
Eugene....................................  9+, 13, 16+, *28-, and 34
Grants Pass...............................  *18+, 30+
Klamath Falls.............................  2-, *22+, and 31
LaGrande..................................  *13+, 16
Medford...................................  5, *8+, 10+, 12+, and 26+
North Bend................................  *17+
Pendleton.................................  11-
Portland..................................  2, 6+, 8-, *10, 12, 24+,
                                             *30, 40-
Roseburg..................................  4+, 36, 46+
Salem.....................................  22, 32
The Dalles................................  *17-
------------------------------------------------------------------------


                              Pennsylvania
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Allentown.................................  *39, 69
Altoona...................................  10-, 23-, 47, *57+
Bethlehem.................................  60-
Clearfield................................  *3+
Erie......................................  12, 24, 35+, *54+, 66+
Greensburg................................  40+
Harrisburg................................  21+, 27-, *33+
Hazleton..................................  56
Jeanette..................................  19+
Johnstown.................................  6, 8-, 19+, *28+
Lancaster.................................  8+, 15+
Lebanon...................................  55-
Philadelphia..............................  3, 6-, 10, 17-, 29, *35-, 57
Pittsburgh................................  2-, 4+, 11, *13-, *16, 22,
                                             53+
Reading...................................  51
Red Lion..................................  49+
Scranton..................................  16-, 22-, 38+, *44-, 64
State College.............................  29+, and *59+
Wilkes Barre..............................  28
Williamsport..............................  \1\ 20-, 53-
York......................................  43,
------------------------------------------------------------------------


                              Rhode Island
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Block Island..............................  69-
Providence................................  10+, 12+, \1\ 16, *36, 64+
------------------------------------------------------------------------


                             South Carolina
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aiken.....................................  *44
Allendale.................................  *14
Anderson..................................  40
Beaufort..................................  *16-
Charleston................................  2+, 4, 5+, *7-, 24, and 36+
Columbia..................................  10-, 19+, 25-, *35+, 47, 57-
Conway....................................  *23+
Florence..................................  13+, 15-, 21, *33+
Georgetown................................  *41-
Greenville................................  4-, 16+, *29
Greenwood.................................  *38, 48+
Hardeeville...............................  28-
Myrtle Beach..............................  32, 43+
Rock Hill.................................  30+, 55-
Spartanburg...............................  7+, 49
Sumter....................................  *27- and 63-
------------------------------------------------------------------------


                              South Dakota
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Aberdeen..................................  9-, *16-
Allen.....................................  22+
Brookings.................................  *8
Eagle Butte...............................  *13
Florence..................................  3-
Huron.....................................  12+
Lead......................................  5-, 11+
Lowry.....................................  *11-, 56, 62+, 68-
Martin....................................  *8-
Mitchell..................................  5+
Pierre....................................  4, *10+
Rapid City................................  3+, 7+, *9, 15-, 21-
Reliance..................................  6-

[[Page 171]]

 
Seneca....................................  *2-
Sioux Falls...............................  11, 13+, 17-, *23, 36+, 46
Vermillion................................  *2+
------------------------------------------------------------------------


                                Tennessee
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Athens....................................  *24
Chattanooga...............................  3+, 9, 12+, *45, 61-
Cleveland.................................  53
Cookeville................................  *22, 28+
Crossville................................  20+, *55+
Fayetteville..............................  *29-
Greeneville...............................  39-
Hendersonville............................  50
Jackson...................................  7+, 16+, *32+
Jellico...................................  54-
Johnson City..............................  11-, *41
Kingsport.................................  19
Knoxville.................................  6, 8, 10+, *15-, 26-, 43+
Lebanon...................................  66--
Lexington.................................  *11+
Livingston................................  60-
McMinnville...............................  33+
Memphis...................................  3-, 5+, *10+, 13+, *14+, 24,
                                             30, 50+, and *56
Murfreesboro..............................  39+
Nashville.................................  2-, 4+, 5, *8+, 17+, 30+,
                                             *42, and 58
Sneedville................................  *2+
Tazewell..................................  48+
Tullahoma.................................  64+
Union City................................  41
------------------------------------------------------------------------


                                  Texas
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Abilene...................................  9+, 15, *26+, 32+
Alpine....................................  12-
Alvin.....................................  67
Amarillo..................................  *2+, 4, 7, 10, 14+
Austin....................................  7+, *18+, 24, 36, 42-, and
                                             54
Bay City..................................  *43+
Baytown...................................  57+
Beaumont..................................  6-, 12-, 21, *34-
Belton....................................  46-
Big Spring................................  4-, *14
Blanco....................................  52+
Boquillas.................................  8-
Brady.....................................  13
Brownsville...............................  23
Bryan.....................................  3, 28
Childress.................................  *21
College Station...........................  *15, 50-
Conroe....................................  49+ and 55+
Corpus Christi............................  3-, 6, 10-, *16, 28-, 38+
Crockett..................................  40
Dallas....................................  4+, 8, *13+, 27-, 33+, 39,
                                             and 58
Decatur...................................  29
Del Rio...................................  10, *24+
Denton....................................  *2
Eagle Pass................................  16+
El Paso...................................  4, 7, 9, *13, 14, 26+, *38--
                                             , and 65
Farwell...................................  18+
Fort Stockton.............................  5+
Fort Worth................................  5+, 11-, 21-, *31+, and 52-
Fredericksburg............................  2+
Galveston.................................  *22, 48
Garland...................................  23
Greenville................................  47+
Harlingen.................................  4+, *44, 60
Houston...................................  2-, *8, 11+, 13-, *14, 20,
                                             26, 39-, and 61
Irving....................................  49
Jacksonville..............................  56
Katy......................................  51+
Kennville.................................  35+
Killeen...................................  62
Lake Dallas...............................  55
Laredo....................................  8, 13, 27-, *39
Liano.....................................  14-
Longview..................................  16+, 51-, and 54+
Lubbock...................................  *5-,11,13-, 16+, 28, and 34-
Lufkin....................................  9
McAllen...................................  48
Marfa.....................................  3
Marshall..................................  *22-, 35+
Midland...................................  2-, 18
Mineola...................................  64+
Monahans-Odessa...........................  9-
Nacogdoches...............................  19-, *32
Odessa....................................  7-, 24-, 30, *36+, and 42
Palestine.................................  43
Paris, Texas..............................  36+, 42+
Port Arthur...............................  4-
Presidio..................................  7+
Rio Grande City...........................  40
Rosenberg.................................  45
San Angelo................................  3-, 6, 8+, *21+
San Antonio...............................  4, 5, *9-, 12+, *23-, 29+,
                                             41+, and 60+
Sherman...................................  12-, 20-, *26-
Snyder....................................  17-
Sonora....................................  11+
Sulphur Springs...........................  18
Sweetwater................................  12
Temple....................................  6+,
Texarkana.................................  6, 17-, *34
Tyler.....................................  7,14+, *38, and 60
Uvalde....................................  26-
Victoria..................................  19+, 25, 31, and *47
Waco......................................  10+, 25+, *34+, 44-
Weslaco...................................  5-
Wichita Falls.............................  3+, 6-, 18-, *24
Wolfforth.................................  22-
------------------------------------------------------------------------


                                  Utah
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Cedar City................................  4, *16+
Logan.....................................  12-, *22
Moab......................................  *14+
Monticello................................  *16-
Ogden.....................................  *9+, *18-, 24, 30
Price.....................................  3+, *15
Provo.....................................  *11-, 16, 32
Richfield.................................  8+, *19
Salt Lake City............................  2-, 4-, 5+, *7-, 13+, 14-,
                                             20+, *26-
St. George................................  12, *18-
Vernal....................................  6, *17+
------------------------------------------------------------------------


                                 Vermont
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Burlington................................  3, 22+, *33-, 44+
Hartford..................................  31
Rutland...................................  *28+

[[Page 172]]

 
St. Johnsbury.............................  *20-
Windsor...................................  *41
------------------------------------------------------------------------


                                Virginia
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Arlington.................................  14-
Ashland...................................  65+
Blacksburg................................  *43, 65-
Bristol...................................  5+, *28-
Bluefield.................................  *63+
Charlottesville...........................  29-, *41-, 64+
Courtland.................................  *52
Danville..................................  24-, 44+, *56
Farmville.................................  *31-
Fairfax...................................  *56-
Fredericksburg............................  69+
Front Royal...............................  *42
Goldvein..................................  *53
Grundy....................................  68
Harrisonburg..............................  3-
Lynchburg.................................  13, 21-, *54+
Manassas..................................  66+
Marion....................................  *52-
Norfolk-Portsmouth-Newport News-..........  3+, 10+, 13-, *15, 27, 33,
                                             49- and
Hampton...................................  *55+
Norton....................................  *47-
Onancock..................................  *25+
Petersburg................................  8
Richmond..................................  6+, 12-, *23, 35+, *57-, 63
Roanoke...................................  7-, 10, *15+, 27+, 38-, and
                                             60
Staunton..................................  *51-
Virginia Beach............................  21+, 43+
West Point................................  *46
------------------------------------------------------------------------


                               Washington
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Anacortes.................................  64
Bellevue..................................  33+, 51+
Bellingham................................  12+, 24, *34
Centralia.................................  *15+
East Wenatchee............................  249A
Everett...................................  16-
Kennewick.................................  42+
Morton....................................  39
Olympia...................................  67
Pasco.....................................  19-
Pullman...................................  *10-, 24+
Richland..................................  25, *31
Rochester.................................  26+
Seattle...................................  4, 5+, 7, *9, 22+, 45+, and
                                             *62
Spokane...................................  2-, 4-, 6-,*7+22, 28-, and
                                             34-
Tacoma....................................  11+, 13-, 20, *28, and *56
Vancouver.................................  *14, 49
Walla Walla...............................  9+
Wenatchee.................................  *18+, 27
Yakima....................................  23+, 29+, 35, *47
------------------------------------------------------------------------


                              West Virginia
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Bluefield.................................  6-, 40-
Charleston................................  8+, 11+, 23, 29, *49-
Clarksburg................................  12+, 46-
Fairmont..................................  66-
Grandview.................................  *9-
Huntington................................  3+, 13+, *33+
Keyser....................................  *30+
Lewisburg.................................  59
Martinsburg...............................  *44, 60+
Morgantown................................  *24-
Oak Hill..................................  4
Parkersburg...............................  15-, 39+, *57
Weirton...................................  *50+
Weston....................................  5
Wheeling..................................  7, \1\ 14, *41
Williamson................................  *31+
------------------------------------------------------------------------


                                Wisconsin
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Antigo....................................  46
Appleton..................................  32+
Bloomington...............................  *49
Chippewa Falls............................  48
Crandon...................................  4
Eagle River...............................  34
Eau Claire................................  13+, 18
Fond du Lac...............................  68
Green Bay.................................  2+, 5+, 11+, 26+, *38, 44+
Highland..................................  *51
Janesville................................  57+
Kenosha...................................  55-
Kieler....................................  *46+
LaCrosse..................................  8+, 19+, 25, *31
Madison...................................  3, 15, *21-, 27+, 47+
Manitowoc.................................  16+
Marshfield................................  39-
Mayville..................................  52
Menomonie.................................  *28-
Milwaukee.................................  4-, 6, *10+, 12, 18-, 24+,
                                             30, *36, and 58
Oshkosh...................................  22+and *50+
Park Falls................................  *36+
Racine....................................  49+
Rhinelander...............................  12+
Rice Lake.................................  16
Richland Center...........................  45+
Sheboygan.................................  28
Sturgeon Bay..............................  42
Superior..................................  6+, 40
Suring....................................  14-
Tomah.....................................  43
Wausau....................................  7-, 9, *20+, 33-
Wittenberg................................  55
------------------------------------------------------------------------


                                 Wyoming
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Casper....................................  2+, *6+, 13+, 14-, 20-
Cheyenne..................................  5+, *17, 27-, 33-
Jackson...................................  2, 11+
Lander....................................  *4, 5
Laramie...................................  *8+
Rawlins...................................  11-
Riverton..................................  10+
Rock Springs..............................  13
Sheridan..................................  7, 9+, 12+
------------------------------------------------------------------------


[[Page 173]]


                    U.S. Territories and Possessions
                    [See footnotes at end of tables]
------------------------------------------------------------------------
                                                     Channel No.
------------------------------------------------------------------------
Guam:
  Agana...................................  *4, 8, 10, *12
  Tamuning................................  14, 20
Puerto Rico:
  Aguada..................................  50
  Aguadilla...............................  *32, 44
  Arecibo-Aguadilla.......................  12+
  Arecibo.................................  54, 60
  Bayamon.................................  36
  Caguas..................................  11-, *58
  Carolina................................  52
  Cayey...................................
  Fajardo.................................  13+, 34, and *40
  Guayama.................................  46
  Humacoa.................................  68
  Mayaguez................................  3+, 5-, 16, 22
  Naranjito...............................  64
  Ponce...................................  7+, 9-, 14, 20, *26, 48
  San Juan................................  2+, 4-, *6+, 18, 24, 30, and
                                             *62
  San Sebastian...........................  38
  Utuado..................................
  Yauco...................................  42
Virgin Islands:
  Charlotte Amalie........................  10-, 17, *23, 43
  Charlotte Amalie-Christiansted..........  *3, \6\ *12
  Christiansted...........................  8+, 15, *21, 27
  Frederiksted............................  66
------------------------------------------------------------------------
Footnotes to tables:
 
\1\ Following the decision in Docket No. 18261, channels so indicated
  will not be available for television use until further action by the
  Commission.
\2\ Operation on this channel is subject to the conditions, terms, and
  requirements set out in the Report and Order in Docket No. 19075, RM-
  1645, adopted January 5, 1972, released January 7, 1972, FCC 72-19.
\3\ [Reserved]
\4\ This channel is not available for use at Elgin unless and until it
  is determined by the Commission that it is not needed for use at
  Joliet, Ill.
\5\ [Reserved]
\6\ Stations using these allotments shall limit radiation toward
  stations on the same channel in Puerto Rico, to no more than the
  effective radiated power which would be radiated by an omnidirectional
  radio station using maximum permissible effective radiated power for
  antenna height above average terrain, at the minimum distances from
  such stations specified in Sec. 73.610(b). The FCC shall consider the
  status of the negotiations with the appropriate British authorities
  concerning these allotments when the applications for construction
  permits come before the FCC.


(Sec. 5, 48 Stat. 1068; 47 U.S.C. 155)

[28 FR 13660, Dec. 14, 1963]

    Editorial Note: For FederalRegister citations affecting Sec. 73.606, 
see the List of CFR Sections Affected in the Finding Aids section of 
this volume.



Sec. 73.607  Availability of channels.

    Applications may be filed to construct TV broadcast stations only on 
the channels designated in the Table of Allotments (Sec. 73.606(b)) and 
only in the communities listed therein. Applications which fail to 
comply with this requirement, whether or not accompanied by a petition 
to amend the Table, will not be accepted for filing. However, 
applications specifying channels which accord with publicly announced 
FCC Orders changing the Table of Allotments will be accepted for filing 
even though such applications are tendered before the effective dates of 
such channel changes.

[51 FR 44070, Dec. 8, 1986]



Sec. 73.609  Zones.

    (a) For the purpose of allotment and assignment, the United States 
is divided into three zones as follows:
    (1) Zone I consists of that portion of the United States located 
within the confines of the following lines drawn on the U.S. Albers 
Equal Area Projection Map (based on standard parallels 29\1/2\ deg. and 
45\1/2\ deg.; North American datum): Beginning at the most easterly 
point on the State boundary line between North Carolina and Virginia; 
thence in a straight line to a point on the Virginia-West Virginia 
boundary line located at north latitude 37 deg.49' and west longitude 
80 deg.12'30"; thence westerly along the southern boundary lines of the 
States of West Virginia, Ohio, Indiana, and Illinois to a point at the 
junction of the Illinois, Kentucky, and Missouri State boundary lines; 
thence northerly along the western boundary line of the State of 
Illinois to a point at the junction of the Illinois, Iowa, and Wisconsin 
State boundary lines; thence easterly along the northern State boundary 
line of Illinois to the 90th meridian; thence north along this meridian 
to the 43.5 deg. parallel; thence east along this parallel to the United 
States-Canada border; thence southerly and following that border until 
it again intersects the 43.5 deg. parallel; thence east along this 
parallel to the 71st meridian; thence in a straight line to the 
intersection of the 69th meridian and the 45th parallel; thence east 
along the 45th parallel to the Atlantic Ocean. When any of the above 
lines pass through a city, the city shall be considered to be located in 
Zone I. (See Figure 1 of Sec. 73.699.)
    (2) Zone II consists of that portion of the United States which is 
not located in either Zone I or Zone III, and Puerto Rico, Alaska, 
Hawaiian Islands and the Virgin Islands.

[[Page 174]]

    (3) Zone III consists of that portion of the United States located 
south of a line, drawn on the United States Albers Equal Area Projection 
Map (based on standard parallels 29.50 and 45.50 North American datum), 
beginning at a point on the east coast of Georgia and the 31st parallel 
and ending at the United States-Mexican border, consisting of arcs drawn 
with a 241.4 kilometer (150 mile) radius to the north from the following 
specified points:

------------------------------------------------------------------------
                                                  North         West
                                                latitude      longitude
------------------------------------------------------------------------
(a).........................................       294000"       832400"
(b).........................................       300700"       841200"
(c).........................................       303100"       863000"
(d).........................................       304800"       875830"
(e).........................................       300000"       903830"
(f).........................................       300430"       931900"
(g).........................................       294600"       950500"
(h).........................................       284300"       963930"
(i).........................................       275230"       973200"
------------------------------------------------------------------------

    When any of the above arcs pass through a city, the city shall be 
considered to be located in Zone II. (See Figure 2 of Sec. 73.699.)

[28 FR 13660, Dec. 14, 1963, as amended at 33 FR 15422, Oct. 17, 1968; 
50 FR 23697, June 5, 1985; 51 FR 44070, Dec. 8, 1986]



Sec. 73.610  Minimum distance separations between stations.

    (a) The provisions of this section relate to allotment separations 
and station separations. Petitions to amend the Table of Allotments 
(Sec. 73.606(b)) (other than those also expressly requesting amendment 
of this section or Sec. 73.609) will be dismissed and all applications 
for new TV broadcast stations or for changes in the transmitter sites of 
existing stations will not be accepted for filing if they fail to comply 
with the requirements specified in paragraphs (b), (c) and (d) of this 
section.

    Note: Licensees and permittees of television broadcast stations 
which were operating on April 14, 1952 pursuant to one or more 
separations below those set forth in Sec. 73.610 may continue to so 
operate, but in no event may they further reduce the separations below 
the minimum. As the existing separations of such stations are increased, 
the new separations will become the required minimum separations until 
separations are reached which comply with the requirements of 
Sec. 73.610. Thereafter, the provisions of said section shall be 
applicable.

    (b) Minimum co-channel allotment and station separations:
    (1)

----------------------------------------------------------------------------------------------------------------
                                                                                     Kilometers
                               Zone                                ---------------------------------------------
                                                                        Channels 2-13          Channels 14-69
----------------------------------------------------------------------------------------------------------------
I.................................................................    272.7 (169.5 miles)    248.6 (154.5 miles)
II................................................................    304.9 (189.5 miles)    280.8 (174.5 miles)
III...............................................................    353.2 (219.5 miles)    329.0 (204.5 miles)
----------------------------------------------------------------------------------------------------------------

    (2) The minimum co-channel distance separation between a station in 
one zone and a station in another zone shall be that of the zone 
requiring the lower separation.
    (c) Minimum allotment and station adjacent channel separations 
applicable to all zones:
    (1) Channels 2-13 95.7 kilometers (59.5 miles). Channels 14-69 87.7 
kilometers (54.5 miles).
    (2) Due to the frequency spacing which exists between Channels 4 and 
5, between Channels 6 and 7, and between Channels 13 and 14, the minimum 
adjacent channel separations specified above shall not be applicable to 
these pairs of channels (see Sec. 73.603(a)).
    (d) In addition to the requirements of paragraphs (a), (b) and (c) 
of this section, the minimum assignment and station separations between 
stations on Channels 14-69, inclusive, as set forth in Table II of 
Sec. 73.698 must be met in either rule-making proceedings looking 
towards the amendment of the Table of Assignments (Sec. 73.606(b)) or in 
licensing proceedings. No channel listed in column (1) of Table II of 
Sec. 73.698 will be assigned to any city, and no application for an 
authorization to operate on such a channel will be granted, unless the 
distance separations indicated at the top of columns (2) through (7), 
inclusive, are met with respect to each of the channels listed in those 
columns and parallel with the channel in column (1).
    (e) The zone in which the transmitter of a television station is 
located or proposed to be located determines the applicable rules with 
respect to co-channel distance separations where the transmitter is 
located in a different zone from that in which the channel to be 
employed is located.
    (f) The distances listed below apply only to allotments and 
assignments on Channel 6 (82-88 MHz). The Commission

[[Page 175]]

will not accept petitions to amend the Table of Allotments, applications 
for new stations, or applications to change the channel or location of 
existing assignments where the following minimum distances (between 
transmitter sites, in kilometers) from any FM Channel 253 allotment or 
assignment are not met:

       Minimum Distance Separation from FM Channel 253 (98.5 MHz)
------------------------------------------------------------------------
                                                             TV Zones II
                   Fm Class                      TV Zone I      & III
------------------------------------------------------------------------
A.............................................           17           22
B1............................................           19           23
B.............................................           22           26
C3............................................           19           23
C2............................................           22           26
C1............................................           29           33
C.............................................           36           41
------------------------------------------------------------------------


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[28 FR 13660, Dec. 14, 1963, as amended at 37 FR 25842, Dec. 5, 1972; 44 
FR 65765, Nov. 15, 1979; 47 FR 35990, Aug. 18, 1982; 50 FR 23698, June 
5, 1985; 51 FR 44070, Dec. 8, 1986; 54 FR 14964, Apr. 14, 1989; 54 FR 
16368, Apr. 24, 1989; 54 FR 35340, Aug. 25, 1989]



Sec. 73.611  Reference points and distance computations.

    (a) In considering petitions to amend the Table of Allotments 
(Sec. 73.606(b)), the following reference points shall be used by the 
Commission in determining assignment separations between communities:
    (1) Where transmitter sites for the pertinent channels have been 
authorized in communities involved in a petition to amend the Table of 
Allotments, separations between such communities shall be determined by 
the distance between the coordinates of the authorized transmitter sites 
in the respective communities as set forth in the Commission's 
authorizations therefor.
    (2) Where an authorized transmitter site is available for use as a 
reference point in one community but not in the other for the pertinent 
channels, separations shall be determined by the distance between the 
coordinates of the transmitter site as set forth in the FCC's 
authorization therefor and the coordinates of the other community as set 
forth in the publication of the United States Department of the Interior 
entitled, Index to The National Atlas of the United States of America. 
If this publication does not contain the coordinates for said other 
community, the coordinates of the main post office thereof shall be 
used.
    (3) Where no authorized transmitter sites are available for use as 
reference points in both communities for the pertinent channels, the 
distance between the two communities listed in the above publication 
shall be used. If said publication does not contain such distance, the 
separation between the two communities shall be determined by the 
distance between the coordinates thereof as set forth in the 
publication. Where such coordinates are not contained in the 
publication, the coordinates of the main post offices of said 
communities shall be used.
    (4) Where the distance between the reference point in a community to 
which a channel is proposed to be assigned and the reference point in 
another community or communities does not meet the minimum separation 
requirements of Sec. 73.610, the channel may be assigned to such 
community upon a showing that a transmitter site is available that would 
meet the minimum separation requirements of Sec. 73.610 and the minimum 
field strength requirements of Sec. 73.685. In such cases, where a 
station is not authorized in the community or communities to which 
measurements from the proposed channel assignment must be made pursuant 
to Sec. 73.610 a showing should also be made that the distance between 
suitable transmitter sites in such other community or communities and 
the proposed transmitter site for the new channel meet the Commission's 
minimum spacing and coverage requirements.
    (b) Station separations in licensing proceedings shall be determined 
by the distance between the coordinates of the proposed transmitter site 
in one community and
    (1) The coordinates of an authorized transmitter site for the 
pertinent channel in the other community; or, where such transmitter 
site is not available for use as a reference point,
    (2) The coordinates of the other community as set forth in the Index 
to The

[[Page 176]]

National Atlas of the United States of America; or if not contained 
therein,
    (3) The coordinates of the main post office of such other community.
    (4) In addition, where there are pending applications in other 
communities which, if granted, would have to be considered in 
determining station separations, the coordinates of the transmitter 
sites proposed in such applications must be used to determine whether 
the requirements with respect to minimum separations between the 
proposed stations in the respective cities have been met.
    (c) In measuring assignment and station separations involving cities 
listed in the Table in combination, where there is no authorized 
transmitter site in any of the combination cities on the channel 
involved, separation measurements shall be made from the reference point 
which will result in the lowest separation.
    (d) To calculate the distance between two reference points see 
paragraph (c), Sec. 73.208. However, distances shall be rounded to the 
nearest tenth of a kilometer.

[52 FR 11655, Apr. 10, 1987]



Sec. 73.612  Protection from interference.

    (a) Permittees and licensees of TV broadcast stations are not 
protected from any interference which may be caused by the grant of a 
new station or of authority to modify the facilities of an existing 
station in accordance with the provisions of this subpart. The nature 
and extent of the protection from interference accorded to TV broadcast 
stations is limited solely to the protection which results from the 
minimum allotment and station separation requirements and the rules and 
regulations with respect to maximum powers and antenna heights set forth 
in this subpart.
    (b) When the Commission determines that grant of an application 
would serve the public interest, convenience, and necessity and the 
instrument of authorization specifies an antenna location in a 
designated antenna farm area which results in distance separation less 
than those specified in this subpart, TV broadcast station permittees 
and licensees shall be afforded protection from interference equivalent 
to the protection afforded under the minimum distance separations 
specified in this subpart.

    Note: The nature and extent of the protection from interference 
accorded to TV broadcast stations which were authorized prior to April 
14, 1952, and which were operating on said date is limited not only as 
specified above but is further limited by any smaller separations 
existing between such stations on said date. Where, as a result of the 
adoption of the Table of Allotments or of changes in transmitter sites 
made by such stations after said date, separations smaller than the 
required minimum are increased but still remain lower than the required 
minimum, protection accorded such stations will be limited to the new 
separations.


[28 FR 13660, Dec. 14, 1963, as amended at 32 FR 8814, June 21, 1967; 50 
FR 23698, June 5, 1985; 51 FR 44070, Dec. 8, 1986]



Sec. 73.614  Power and antenna height requirements.

    (a) Minimum requirements. Applications will not be accepted for 
filing if they specify less than -10 dBk (100 watts) horizontally 
polarized visual effective radiated power in any horizontal direction. 
No minimum antenna height above average terrain is specified.
    (b) Maximum power. Applications will not be accepted for filing if 
they specify a power which exceeds the maximum permitted boundaries 
specified in the following formulas:
    (1) Channels 2-6 in Zone I:

ERPMax=102.57-33.24*Log10(HAAT)


And,

    -10 dBk  ERPMax20 dBk

    (2) Channels 2-6 in Zones II and III:

ERPMax=67.57-17.08* Log10 (HAAT)

And,

    10 dBk  ERPMax20 dBk

    (3) Channels 7-13 in Zone I:

ERPMax=107.57-33.24* Log10 (HAAT)

And,

    -4.0 dBk  ERPMax 25 dBk

    (4) Channels 7-13 in Zones II and III:

ERPMax=72.57-17.08* Log10 (HAAT)

And,

    15 dBk  ERPMax25 dBk

[[Page 177]]

    (5) Channels 14-69 in Zones I, II, and III:

ERPMax=84.57-17.08* Log10 (HAAT)

And,

    27 dBk  ERPMax37 dBk

Where:

ERPMax=Maximum Effective Radiated Power measured in decibels 
          above 1 kW (dBk).
HAAT=Height Above Average Terrain measured in meters.


The boundaries specified are to be used to determine the maximum 
possible combination of antenna height and    ERPdBk. When 
specifying an ERPdBk less than that permitted by the lower 
boundary, any antenna HAAT can be used. Also, for values of antenna HAAT 
greater than 2,300 meters the maximum ERP is the lower limit specified 
for each equation.
    (6) The effective radiated power in any horizontal or vertical 
direction may not exceed the maximum values permitted by this section.
    (7) The effective radiated power at any angle above the horizontal 
shall be as low as the state of the art permits, and in the same 
vertical plane may not exceed the effective radiated power in either the 
horizontal direction or below the horizontal, whichever is greater.
    (c) Determination of applicable rules. The zone in which the 
transmitter of a television station is located or proposed to be located 
determines the applicable rules with respect to maximum antenna heights 
and powers for VHF stations when the transmitter is located in Zone I 
and the channel to be employed is located in Zone II, or the transmitter 
is located in Zone II and the channel to be employed is located in Zone 
I.

[28 FR 13660, Dec. 14, 1963, as amended at 42 FR 20823, Apr. 22, 1977; 
42 FR 48881, Sept. 26, 1977; 47 FR 35990, Aug. 18, 1982; 50 FR 23698, 
June 5, 1985; 56 FR 49707, Oct. 1, 1991; 58 FR 51250, Oct. 1, 1993]



Sec. 73.615  Administrative changes in authorizations.

    In the issuance of television broadcast station authorizations, the 
Commission will specify the transmitter output power and effective 
radiated power to the nearest 0.1 dBk. Power specified by kWs shall be 
obtained by converting dBk to kWs to 3 significant figures. Antenna 
heights above average terrain will be specified to the nearest meter. 
Midway figures will be authorized in the lower alternative.

[50 FR 23698, June 5, 1985]



Sec. 73.621  Noncommercial educational TV stations.

    In addition to the other provisions of this subpart, the following 
shall be applicable to noncommercial educational television broadcast 
stations:
    (a) Except as provided in paragraph (b) of this section, 
noncommercial educational broadcast stations will be licensed only to 
nonprofit educational organizations upon a showing that the proposed 
stations will be used primarily to serve the educational needs of the 
community; for the advancement of educational programs; and to furnish a 
nonprofit and noncommercial television broadcast service.
    (1) In determining the eligibility of publicly supported educational 
organizations, the accreditation of their respective state departments 
of education shall be taken into consideration.
    (2) In determining the eligibility of privately controlled 
educational organizations, the accreditation of state departments of 
education or recognized regional and national educational accrediting 
organizations shall be taken into consideration.
    (b) Where a municipality or other political subdivision has no 
independently constituted educational organization such as, for example, 
a board of education having autonomy with respect to carrying out the 
municipality's educational program, such municipality shall be eligible 
for a noncommercial educational television broadcast station. In such 
circumstances, a full and detailed showing must be made that a grant of 
the application will be consistent with the intent and purpose of the 
Commission's rules and regulations relating to such stations.
    (c) Noncommercial educational television broadcast stations may 
transmit educational, cultural and entertainment programs, and programs 
designed for use by schools and school systems in connection with 
regular school

[[Page 178]]

courses, as well as routine and administrative material pertaining 
thereto.
    (d) A noncommercial educational television station may broadcast 
programs produced by or at the expense of, or furnished by persons other 
than the licensee, if no other consideration than the furnishing of the 
program and the costs incidental to its production and broadcast are 
received by the licensee. The payment of line charges by another 
station, network, or someone other than the licensee of a noncommercial 
educational television station, or general contributions to the 
operating costs of a station, shall not be considered as being 
prohibited by this paragraph.
    (e) Each station shall furnish a nonprofit and noncommercial 
broadcast service. Noncommercial educational television stations shall 
be subject to the provisions of Sec. 73.1212 to the extent that they are 
applicable to the broadcast of programs produced by, or at the expense 
of, or furnished by others. No promotional announcements on behalf of 
for profit entities shall be broadcast at any time in exchange for the 
receipt, in whole or in part, of consideration to the licensee, its 
principals, or employees. However, acknowledgements of contributions can 
be made. The scheduling of any announcements and acknowledgements may 
not interrupt regular programming.

    Note: Commission interpretation of this rule, including the 
acceptable form of acknowledgements, may be found in the Second Report 
and Order in Docket No. 21136 (Commission Policy Concerning the 
Noncommercial Nature of Educational Broadcast Stations), 86 F.C.C. 2d 
141 (1981); the Memorandum Opinion and Order in Docket No. 21136, 90 FCC 
2d 895 (1982), and the Memorandum Opinion and Order in Docket 21136, 49 
FR 13534, April 5, 1984.

    (f) Telecommunications Service on the Vertical Blanking Interval and 
in the Visual Signal. The provisions governing VBI and visual signal 
telecommunications service in Sec. 73.646 are applicable to 
noncommercial educational TV stations.
    (g) Non-program related data signals transmitted on Line 21 pursuant 
to Sec. 73.682(a)(22)(ii) may be used for remunerative purposes.

[28 FR 13660, Dec. 14, 1963, as amended at 35 FR 7558, May 15, 1970; 47 
FR 36179, Aug. 19, 1982; 48 FR 27068, June 13, 1983; 49 FR 29069, July 
18, 1984; 50 FR 4664, Feb. 1, 1985; 50 FR 4684, Feb. 1, 1985; 61 FR 
36304, July 10, 1996]



Sec. 73.622  Digital television table of allotments.

    (a) General. The following table of allotments contains the digital 
television (DTV) channel allotments designated for the listed 
communities in the United States, its Territories, and possessions. The 
initial DTV Table of Allotments was established on April 3, 1997, to 
provide a second channel for DTV service for all eligible analog 
television broadcasters. Requests for addition of new DTV allotments, or 
requests to change the channels allotted to a community must be made in 
a petition for rule making to amend the DTV Table of Allotments. A 
request to amend the DTV table to change the channel of an allotment in 
the DTV table will be evaluated for technical acceptability using 
engineering criteria set forth in Sec. 73.623(c). A request to amend the 
DTV table to add a new allotment will be evaluated for technical 
acceptability using the geographic spacing criteria set forth in 
Sec. 73.623(d). DTV allotments designated with an asterisk are assigned 
for use by non-commercial educational broadcast stations only. Stations 
operating on DTV allotments designated with a ``c'' are required to 
comply with paragraph (g) of this section.
    (1) Petitions requesting the addition of a new allotment must 
specify a channel in the range of channels 2-51.
    (2) Petitions requesting a change in the channel of an initial 
allotment must specify a channel in the range of channels 2-59.
    (b) DTV Table of Allotments.

                                 Alabama
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Anniston..............................  58
Bessemer..............................  18c
Birmingham............................  30, 36, 50, 52, *53
Demopolis.............................  *19
Dothan................................  21, 36
Dozier................................  *59
Florence..............................  14, 20, *22
Gadsden...............................  26, 45c

[[Page 179]]

 
Homewood..............................  28
Huntsville............................  *24, 32c, 41, 49c, 59
Louisville............................  *44c
Mobile................................  9, 20, 27, *41, 47
Montgomery............................  *14, 16, 46c, 51, 57
Mount Cheaha..........................  *56
Opelika...............................  31
Ozark.................................  33
Selma.................................  55
Troy..................................  48
Tuscaloosa............................  34c
Tuskegee..............................  24
------------------------------------------------------------------------


                                 Alaska
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Anchorage.............................  18, 20, 22, *24, *26, 28, 30, 32
Bethel................................  *3
Dillingham............................  *9
Fairbanks.............................  18, 22, *24, 26, 28
Juneau................................  *6, 11
Ketchikan.............................  *8, 13
North Pole............................  20
Sitka.................................  2
------------------------------------------------------------------------


                                 Arizona
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Flagstaff.............................  18, 22, 27, 32
Green Valley..........................  47c
Kingman...............................  19, *46
Lake Havasu City......................  32
Mesa..................................  36
Phoenix...............................  17, 20, 24, 26, *29, 31, 34c,
                                         49, 56
Prescott..............................  25
Sierra Vista..........................  44
Tolleson..............................  52c
Tucson................................  19c, 23, 25, *28c, *30, 32, 35,
                                         42
Yuma..................................  16, 41
------------------------------------------------------------------------


                                Arkansas
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Arkadelphia...........................  *46
El Dorado.............................  27
Fayetteville..........................  15, *45
Fort Smith............................  18, 21, 27
Hot Springs...........................  14
Jonesboro.............................  9c, *20c, 49c
Little Rock...........................  12c, 22, 30, 32, 43c, *47
Mountain View.........................  *35
Newark................................  *27
Pine Bluff............................  24, 39c
Rogers................................  50
Springdale............................  39
------------------------------------------------------------------------


                               California
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Anaheim...............................  32
Arcata................................  22
Bakersfield...........................  10, 25, 33, 55
Barstow...............................  44
Blythe................................  *4
Calipatria............................  50
Ceres.................................  *15c
Chico.................................  36, 43
Clovis................................  44c
Coalinga..............................  *22
Concord...............................  63c
Corona................................  39
Cotati................................  *23c
El Centro.............................  22, 48
Eureka................................  *11, 16, 17, 28
Fort Bragg............................  15
Fresno................................  7, 9, 14, 16, *40
Hanford...............................  20
Huntington Beach......................  *48
Long Beach............................  61c
Los Angeles...........................  31c, 35c, 36, *41c, 42, 43, 53c,
                                         *59c, 60, 65c, 66
Merced................................  38
Modesto...............................  18
Monterey..............................  31, 32
Novato................................  47
Oakland...............................  56
Ontario...............................  47c
Oxnard................................  24
Palm Springs..........................  46, 52
Paradise..............................  20
Porterville...........................  48
Rancho Palos Verdes...................  51c
Redding...............................  14, *18
Riverside.............................  68
Sacramento............................  21, 35, 48, *53, 55, 61
Salinas...............................  13, 43
San Bernardino........................  *26, 38
San Diego.............................  18, 19, 25, *30, 40c, 55
San Francisco.........................  19, 24, 27c, 29, *30, *33c, 39c,
                                         45c, 51, 57
San Jose..............................  12c, 41, 49c, *50, 52
San Luis Obispo.......................  15, 34c
San Mateo.............................  *59
Sanger................................  36
Santa Ana.............................  23c
Santa Barbara.........................  21, 27
Santa Maria...........................  19
Santa Rosa............................  54
Stockton..............................  25, 46, 62
Twentynine Palms......................  23
Vallejo...............................  34
Ventura...............................  49
Visalia...............................  28, *50c
Watsonville...........................  *58
------------------------------------------------------------------------


                                Colorado
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Boulder...............................  15c
Broomfield............................  *38
Castle Rock...........................  46
Colorado Springs......................  10, 22c, 24
Craig.................................  *48
Denver................................  16, 17, *18, 19, 32c, 34, 35,
                                         *40, 43, 51c
Durango...............................  15
Fort Collins..........................  21
Glenwood Springs......................  23, *39
Grand Junction........................  2, 7, 12c, 15, *17
La Junta..............................  *30
Lamar.................................  *50
Leadville.............................  *49
Longmont..............................  29
Montrose..............................  13
Pueblo................................  *26, 42

[[Page 180]]

 
Steamboat Springs.....................  10
Sterling..............................  23
------------------------------------------------------------------------


                               Connecticut
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Bridgeport............................  42, *52
Hartford..............................  5, *32, 33, 46
New Britain...........................  35
New Haven.............................  6, 10, *39
New London............................  34
Norwich...............................  *45
Waterbury.............................  12
------------------------------------------------------------------------


                                Delaware
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Seaford...............................  *44
Wilmington............................  31, *55
------------------------------------------------------------------------


                          District of Columbia
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Washington............................  *27c, *33c, 34, 35, 36, 39, 48,
                                         51c
------------------------------------------------------------------------


                                 Florida
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Boca Raton............................  *44
Bradenton.............................  *5, 42
Cape Coral............................  35
Clearwater............................  21
Clermont..............................  17
Cocoa.................................  *30, 51
Daytona Beach.........................  11, 49
Fort Lauderdale.......................  52c
Fort Myers............................  15, *31c, 53
Fort Pierce...........................  *38, 50
Fort Walton Beach.....................  25, 40, 49
Gainesville...........................  16, *36
High Springs..........................  28
Hollywood.............................  47
Jacksonville..........................  13c, 19, 32, 34, *38, 42, *44
Key West..............................  3, 12
Lake Worth............................  36
Lakeland..............................  19
Leesburg..............................  40, *46c
Live Oak..............................  48
Marathon..............................  *34
Melbourne.............................  20, 48
Miami.................................  8c, 9, *18c, 19, *20, 22, 24c,
                                         26, 30, 32, 46c
Naples................................  41, 45
New Smyrna Beach......................  *33
Ocala.................................  31
Orange Park...........................  10
Orlando...............................  14, 22, *23, 39, 41, 58
Palm Beach............................  49
Panama City...........................  19, 29c, *38, 42
Panama City Beach.....................  47c
Pensacola.............................  17, *31, 34c, 45c
Sarasota..............................  52
St. Petersburg........................  24, 57, 59
Tallahassee...........................  2, 22, *32
Tampa.................................  7, 12, 29c, *34, 47, *54
Tequesta..............................  16
Tice..................................  33
Venice................................  25
West Palm Beach.......................  13c, *27, 28, 55
------------------------------------------------------------------------


                                 Georgia
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Albany................................  17, 30
Athens................................  *22, 48
Atlanta...............................  10, 19, 20, *21, 25, 27, 39,
                                         *41, 43
Augusta...............................  30, 31, 42, 51
Bainbridge............................  50c
Baxley................................  35c
Brunswick.............................  24
Chatsworth............................  *33
Cochran...............................  *7
Columbus..............................  15, *23, 35, 47, 9
Cordele...............................  51
Dalton................................  16
Dawson................................  *26c
Macon.................................  16, 40, 45, 50
Monroe................................  44
Pelham................................  *20
Perry.................................  32
Rome..................................  51
Savannah..............................  15, 23c, 39, *46
Thomasville...........................  52
Toccoa................................  24
Valdosta..............................  43
Waycross..............................  *18
Wrens.................................  *36
------------------------------------------------------------------------


                                 Hawaii
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Hilo..................................  8, 18, *19, 21, 22, 23, *31,
                                         *39c
Honolulu..............................  8, *18, 19, 22, 23, 27c, 31,
                                         33c, 35, *39c, 40, *43
Kailua Kona...........................  25
Kaneohe...............................  41
Lihue.................................  *7, *12, *28c, *45
Wailuku...............................  16c, 20, 24, *28c, 29, *30,
                                         *34c, 36
------------------------------------------------------------------------


                                  Idaho
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Boise.................................  *21, 26, 28
Burley................................  *48
Caldwell..............................  10c
Coeur D'alene.........................  *45
Filer.................................  *18
Idaho Falls...........................  9c, 36
Lewiston..............................  32
Moscow................................  *35
Nampa.................................  24, 44
Pocaello..............................  *17, 23
Twin Falls............................  16, *22, 34
Weiser................................  *34
------------------------------------------------------------------------


                                Illinois
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Aurora................................  59
Bloomington...........................  28

[[Page 181]]

 
Carbondale............................  *40
Champaign.............................  41, 48
Charleston............................  *50
Chicago...............................  3c, 19, *21c, 27c, 29, 31, 43,
                                         45c, *47, 52
Decatur...............................  18c, 22
East St. Louis........................  47c
Freeport..............................  41
Harrisburg............................  34
Jacksonville..........................  *15c
Joliet................................  53
Lasalle...............................  10
Macomb................................  *21
Marion................................  17
Moline................................  *23, 38
Mount Vernon..........................  21
Olney.................................  *19
Peoria................................  30, 39, 40, *46, 57
Quincy................................  32, *34, 54
Rock Island...........................  58
Rockford..............................  16, 42, 54
Springfield...........................  42, 44, 53
Urbana................................  26, *33
------------------------------------------------------------------------


                                 Indiana
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Angola................................  12
Bloomington...........................  *14, 27, 53, 56
Elkhart...............................  58
Evansville............................  28, 45c, 46, *54, 59
Fort Wayne............................  4, 19, 24, 36, *40c
Gary..................................  *17, 51c
Hammond...............................  36
Indianapolis..........................  9c, 16, *21c, 25, *44, 45, 46
Kokomo................................  54
Lafayette.............................  11
Marion................................  32
Muncie................................  52
Richmond..............................  39
Salem.................................  51
South Bend............................  30, *35c, 42, 48
Terre Haute...........................  24, 36, 39c
Vincennes.............................  *52
------------------------------------------------------------------------


                                  Iowa
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Ames..................................  59
Burlington............................  41
Cedar Rapids..........................  27, 47, 51, 52
Centerville...........................  *44
Council Bluffs........................  *33c
Davenport.............................  *34, 49, 56
Des Moines............................  16, 19, 26, 31, *50
Dubuque...............................  43
Fort Dodge............................  *25
Iowa City.............................  25, *45
Mason City............................  *18, 42
Ottumwa...............................  14
Red Oak...............................  *35
Sioux City............................  *28c, 30, 39, 41, 49
Waterloo..............................  *35, 55
------------------------------------------------------------------------


                                 Kansas
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Colby.................................  17
Ensign................................  5
Fort Scott............................  40
Garden City...........................  16, 18, *42
Goodland..............................  14
Great Bend............................  22
Hays..................................  *16, 20
Hutchinson............................  19, *29, 35
Lakin.................................  *23
Lawrence..............................  36
Oakley................................  *40
Pittsburg.............................  30
Salina................................  17
Topeka................................  *23, 28c, 44, 48
Wichita...............................  21, 26, 31, 45
------------------------------------------------------------------------


                                Kentucky
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Ashland...............................  *26c, 44
Beattyville...........................  7
Bowling Green.........................  16, *18, 33, *48
Campbellsville........................  19
Covington.............................  *24
Danville..............................  4
Elizabethtown.........................  *43
Harlan................................  51
Hazard................................  12, *16
Lexington.............................  22, 40, *42, 59
Louisville............................  8, *17, 26, *38, 47, 49, 55
Madisonville..........................  20c, *42
Morehead..............................  *15, 21
Murray................................  *36
Newport...............................  29
Owensboro.............................  30
Owenton...............................  *44
Paducah...............................  32, 41, 50c
Pikeville.............................  *24
Somerset..............................  *14
------------------------------------------------------------------------


                                Louisiana
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Alexandria............................  *26c, 32c, 35
Baton Rouge...........................  *25, 34c, 42, 45c, 46
Columbia..............................  57
Lafayette.............................  16c, *23, 28, 56
Lake Charles..........................  8c,*20, 30c
Monroe................................  *19, 55
New Orleans...........................  *11, 14, 15, 29, 30, *31, 40,
                                         43, 50c
Shreveport............................  17, *25c, 28, 34c, 44
Slidell...............................  24
West Monroe...........................  36, 38
------------------------------------------------------------------------


                                  Maine
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Augusta...............................  *17
Bangor................................  14, 19, 25
Biddeford.............................  *45
Calais................................  *15
Lewiston..............................  28
Orono.................................  *22
Poland Spring.........................  46
Portland..............................  4, 38, 44
Presque Isle..........................  16, *20
------------------------------------------------------------------------


[[Page 182]]


                                Maryland
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Annapolis.............................  *42
Baltimore.............................  *29, 38, 40, 41, 46c, 52, 59
Frederick.............................  *28
Hagerstown............................  16, *44, 55
Oakland...............................  *54
Salisbury.............................  21, 53, *56
------------------------------------------------------------------------


                              Massachusetts
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Adams.................................  36
Boston................................  *19, 20, 30, 31, 32, 39c, 42,
                                         *43
Cambridge.............................  41
Lawrence..............................  18
Marlborough...........................  23
New Bedford...........................  22, 49
Norwell...............................  52
Springfield...........................  11, 55, *58c
Vineyard Haven........................  40
Worcester.............................  29, *47
------------------------------------------------------------------------


                                Michigan
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Alpena................................  13, *57
Ann Arbor.............................  33
Bad Axe...............................  *15
Battle Creek..........................  20, 44c
Bay City..............................  22
Cadillac..............................  40, 47, *58
Calumet...............................  18
Cheboygan.............................  14
Detroit...............................  14, 21c, 41, *43, 44, 45, 58
East Lansing..........................  *55
Escanaba..............................  48
Flint.................................  16, 36, *52
Grand Rapids..........................  7, *11, 19, 39
Iron Mountain.........................  22
Jackson...............................  34
Kalamazoo.............................  2, *5, 45
Lansing...............................  38, 51, 59
Manistee..............................  *17
Marquette.............................  *33, 3
Mount Clemens.........................  39c
Mount Pleasant........................  *56
Muskegon..............................  24
Onondaga..............................  57
Saginaw...............................  30, 48
Sault Ste. Marie......................  49, 56
Traverse City.........................  31, 50
University Center.....................  *18
Vanderbilt............................  59
------------------------------------------------------------------------


                                Minnesota
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Alexandria............................  14, 24
Appleton..............................  *31
Austin................................  *20, 33
Bemidji...............................  *18
Brainerd..............................  *28
Crookston.............................  *16
Duluth................................  17, 33, *38, 43
Hibbing...............................  36, *51
Mankato...............................  38
Minneapolis...........................  21, 22, *26, 32, 35, *44
Redwood Falls.........................  27
Rochester.............................  36, 46
St. Cloud.............................  40
St. Paul..............................  *16, *34, 50
Thief River Falls.....................  57
Walker................................  20
Worthington...........................  *15
------------------------------------------------------------------------


                               Mississippi
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Biloxi................................  *16, 39
Booneville............................  *55
Bude..................................  *18c
Columbus..............................  35
Greenville............................  17
Greenwood.............................  *25, 54
Gulfport..............................  48
Hattiesburg...........................  58
Holly Springs.........................  41c
Jackson...............................  *20, 21, 41c, 51, 52
Laurel................................  28
Meridian..............................  26, 31c, *44, 49
Mississippi State.....................  *38
Natchez...............................  49c
Oxford................................  *36
Tupelo................................  57
West Point............................  16
------------------------------------------------------------------------


                                Missouri
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Birch Tree............................  *7
Bowling Green.........................  *50
Cape Girardeau........................  22, 57
Columbia..............................  22, 36
Hannibal..............................  29
Jefferson City........................  12, 20
Joplin................................  *25, 43, 46
Kansas City...........................  14, *18, 24, 31, 34, 42c, 47,
                                         51c
Kirksville............................  33
Poplar Bluff..........................  18
Sedalia...............................  15
Springfield...........................  19, *23, 28c, 44, 52
St. Joseph............................  21, 53
St. Louis.............................  14, 26, 31c, 35, *39, 43, 56
------------------------------------------------------------------------


                                 Montana
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Billings..............................  11, 17, 18
Bozeman...............................  16, *20
Butte.................................  2, 15, 19c
Glendive..............................  15
Great Falls...........................  39, 44, 45
Hardin................................  22
Helena................................  14, 29
Kalispell.............................  38
Miles City............................  13, *39
Missoula..............................  *27, 35, 36, 40
------------------------------------------------------------------------


                                Nebraska
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Albion................................  23
Alliance..............................  *24

[[Page 183]]

 
Bassett...............................  *15
Grand Island..........................  19, 32
Hastings..............................  *14, 21
Hayes Center..........................  18
Kearney...............................  36
Lexington.............................  *26
Lincoln...............................  25, 31, *40
McCook................................  12
Merriman..............................  *17
Norfolk...............................  *16
North Platte..........................  *16, 22
Omaha.................................  *17, 20, 22, 38, 43c, 45
Scottsbluff...........................  20, 29
Superior..............................  34
------------------------------------------------------------------------


                                 Nevada
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Elko..................................  8, *15
Henderson.............................  24
Las Vegas.............................  2, 7, *11c, 16c, 17, 22c, 29
Paradise..............................  40c
Reno..................................  *15, 22c, 23, 26, 32, 34, 44
Winnemucca............................  12
------------------------------------------------------------------------


                              New Hampshire
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Berlin................................  *15
Concord...............................  33
Derry.................................  35
Durham................................  *57
Keene.................................  *49
Littleton.............................  *48
Manchester............................  59
Merrimack.............................  34
------------------------------------------------------------------------


                               New Jersey
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Atlantic City.........................  49, 50
Burlington............................  27
Camden................................  *22
Linden................................  36
Montclair.............................  *51c
New Brunswick.........................  *18
Newark................................  53c, 61
Newton................................  8c
Paterson..............................  40
Secaucus..............................  38
Trenton...............................  *43
Vineland..............................  66c
West Milford..........................  *29
Wildwood..............................  36
------------------------------------------------------------------------


                               New Mexico
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Albuquerque...........................  16, *17, 21, 24c, *25, 26, 42c,
                                         51c
Carlsbad..............................  19
Clovis................................  20
Farmington............................  8, 17
Hobbs.................................  16
Las Cruces............................  *23c, 47
Portales..............................  *32
Roswell...............................  28c, 38, 41
Santa Fe..............................  10, 27, 29
Silver City...........................  12, *33
Socorro...............................  *31
------------------------------------------------------------------------


                                New York
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Albany................................  4, 15, 26
Amsterdam.............................  50
Batavia...............................  53
Binghamton............................  4, 7, 8, *42
Buffalo...............................  14, *32, 33, 34, 38, 39, *43
Carthage..............................  35
Corning...............................  50
Elmira................................  2, 55
Garden City...........................  *22c
Jamestown.............................  27c
Kingston..............................  21
New York..............................  *24, 28, 30, 33, 44, 45, 56
North Pole............................  14
Norwood...............................  *23
Plattsburgh...........................  *38
Poughkeepsie..........................  27
Riverhead.............................  57
Rochester.............................  *16, 28, 45, 58, 59
Schenectady...........................  *34, 39, 43
Smithtown.............................  23
Springville...........................  46
Syracuse..............................  17, 19, *25c, 44c, 47, 54
Utica.................................  27, 29, 30
Watertown.............................  21, *41
------------------------------------------------------------------------


                             North Carolina
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Asheville.............................  *25, 45, 56, 57
Belmont...............................  47c
Burlington............................  14
Chapel Hill...........................  *59
Charlotte.............................  22, 23, *24, 27, 34
Columbia..............................  *20
Concord...............................  *44
Durham................................  27, 52
Fayetteville..........................  36, 38
Goldsboro.............................  55
Greensboro............................  33, 43, 51
Greenville............................  10c, 21, *23
Hickory...............................  40
High Point............................  35
Jacksonville..........................  34, *44
Kannapolis............................  50
Lexington.............................  19
Linville..............................  *54
Lumberton.............................  *25
Morehead City.........................  24
New Bern..............................  48
Raleigh...............................  49, 53, 57
Roanoke Rapids........................  *39
Rocky Mount...........................  15
Washington............................  32
Wilmington............................  *29, 30, 46, 54
Wilson................................  42
Winston-Salem.........................  29, 31, *32
------------------------------------------------------------------------


[[Page 184]]


                              North Dakota
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Bismarck..............................  16, *22, 23, 31
Devils Lake...........................  *25, 59
Dickinson.............................  18, 19, *20
Ellendale.............................  *20c
Fargo.................................  19, 21, *23, 58
Grand Forks...........................  *56
Jamestown.............................  14
Minot.................................  15c, 45, *57, 58
Pembina...............................  15
Valley City...........................  38
Williston.............................  14, *51, 52
------------------------------------------------------------------------


                                  Ohio
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Akron.................................  30, *50c, 59
Alliance..............................  *46c
Athens................................  *27
Bowling Green.........................  *56
Cambridge.............................  *35
Canton................................  39, 47
Chillicothe...........................  46
Cincinnati............................  10c, 31, 33, *34, 35
Cleveland.............................  2, 15, *26c, 31, 34
Columbus..............................  13, 14, 21, 36, *38
Dayton................................  30, 41, 50, 51, *58
Lima..................................  20, 47
Lorain................................  28
Mansfield.............................  12
Newark................................  24
Oxford................................  *28
Portsmouth............................  17, *43c
Sandusky..............................  42
Shaker Heights........................  10
Springfield...........................  18
Steubenville..........................  57
Toledo................................  5, 17, 19, *29, 46, 49
Youngstown............................  20, 36, 41
Zanesville............................  40
------------------------------------------------------------------------


                                Oklahoma
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Ada...................................  26
Bartlesville..........................  15
Cheyenne..............................  *8
Claremore.............................  *36c
Enid..................................  18
Eufaula...............................  *31
Guymon................................  *29
Lawton................................  23
Oklahoma City.........................  15c, 16, 24, 27, *32, 33, 39,
                                         42, 50, 51
Okmulgee..............................  28
Shawnee...............................  29
Tulsa.................................  22, *38, 42c, 48c, 49, 55, 56,
                                         58
------------------------------------------------------------------------


                                 Oregon
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Bend..................................  *11, 18
Coos Bay..............................  21, 22
Corvallis.............................  *39
Eugene................................  14, 17c, 25, *29c, 31
Klamath Falls.........................  29, *33, 40
La Grande.............................  *5
Medford...............................  15, 27c, 35, 38, *42
Pendleton.............................  8
Portland..............................  *27, 30, 40, 43, 45, 6
Roseburg..............................  18, 19, 45
Salem.................................  20, 33c
------------------------------------------------------------------------


                              Pennsylvania
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Allentown.............................  46, *62
Altoona...............................  24c, 32, 46
Bethlehem.............................  59c
Clearfield............................  *15
Erie..................................  16, 22, *50, 52, 58
Greensburg............................  50
Harrisburg............................  4, *36, 57
Hazleton..............................  9
Johnstown.............................  29, 30, 34
Lancaster.............................  23, 58
Philadelphia..........................  26, 32, *34, 42, 54, 64, 67
Pittsburgh............................  25, *26, *38, 42, 43, 48, 51
Reading...............................  25
Red Lion..............................  30
Scranton..............................  13, 31, 32, *41, 49
Wilkes-Barre..........................  11
Williamsport..........................  29
York..................................  47
------------------------------------------------------------------------


                              Rhode Island
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Block Island..........................  17
Providence............................  13c, *21, 51, 54c
------------------------------------------------------------------------


                             South Carolina
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Allendale.............................  *33
Anderson..............................  14
Beaufort..............................  *44
Charleston............................  35, 40, *49, 52, 53, 59
Columbia..............................  8, 17, *32, 41, 48
Conway................................  *58
Florence..............................  16c, 20, *45, 56
Greenville............................  *9, 35, 59
Greenwood.............................  *18
Hardeeville...........................  27
Myrtle Beach..........................  18
Rock Hill.............................  15, 39
Spartanburg...........................  43, 53
Sumter................................  *28c, 38
------------------------------------------------------------------------


                              South Dakota
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Aberdeen..............................  *17c, 28
Brookings.............................  *18
Eagle Butte...........................  *25
Florence..............................  25
Huron.................................  22
Lead..................................  29, 30
Lowry.................................  *15
Martin................................  *23
Mitchell..............................  26
Pierre................................  19, *21
Rapid City............................  16c, 18, 22, *26

[[Page 185]]

 
Reliance..............................  14
Sioux Falls...........................  7, *24c, 29, 32, 40, 47c
Vermillion............................  *34
------------------------------------------------------------------------


                                Tennessee
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Chattanooga...........................  *29, 35, 40, 47, 55
Cleveland.............................  42
Cookeville............................  36, *52
Crossville............................  50
Greeneville...........................  38
Hendersonville........................  51c
Jackson...............................  39, 43
Jellico...............................  23
Johnson City..........................  58
Kingsport.............................  27
Knoxville.............................  *17, 26, 30, 31, 34
Lebanon...............................  44
Lexington.............................  *47
Memphis...............................  25c, 28, *29, 31c, 51c, 52, 53
Murfreesboro..........................  38
Nashville.............................  10, 15, 21, 23, 27, *46, 56
Sneedville............................  *41
------------------------------------------------------------------------


                                  Texas
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Abilene...............................  24, 29
Alvin.................................  36
Amarillo..............................  9, 15c, 19, *21, 23
Arlington.............................  42
Austin................................  21, *22, 33, 43c, 49, 56
Baytown...............................  41
Beaumont..............................  21, *33, 50
Belton................................  47c
Big Spring............................  33
Brownsville...........................  24c
Bryan.................................  29c, 59
College Station.......................  *12
Conroe................................  5, 42
Corpus Christi........................  18, *23, 27, 47, 50
Dallas................................  9c, *14, 32, 35, 36, 40c, 45
Decatur...............................  30c
Del Rio...............................  28
Denton................................  *43
Eagle Pass............................  18
El Paso...............................  15c, 16, 17, 18, 25, *30, *39c,
                                         51
Fort Worth............................  18, 19, 41, 51
Galveston.............................  *23c, 47
Garland...............................  24c
Greenville............................  46
Harlingen.............................  31, *34, 38
Houston...............................  *9c, 19, *24, 27c, 31, 32, 35,
                                         38, 44
Irving................................  48
Jacksonville..........................  22
Katy..................................  52c
Kerrville.............................  32
Killeen...............................  23
Lake Dallas...........................  54
Laredo................................  14, 15, 19
Llano.................................  27
Longview..............................  31
Lubbock...............................  25, 27, 35c, *39, 40, 43
Lufkin................................  43
McAllen...............................  46
Midland...............................  26
Nacogdoches...........................  18
Odessa................................  15, *22, 23, 31, 43c
Port Arthur...........................  40
Rio Grande City.......................  20
Rosenberg.............................  46c
San Angelo............................  11, 16, 19
San Antonio...........................  *16, *20, 30c, 38, 39, 48, 55,
                                         58
Sherman...............................  20
Snyder................................  10
Sweetwater............................  20
Temple................................  50
Texarkana.............................  15, *50
Tyler.................................  38
Victoria..............................  15, 34
Waco..................................  *20, 26c, 53, 57
Weslaco...............................  13
Wichita Falls.........................  15, 22, 28
------------------------------------------------------------------------


                                  Utah
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Cedar City............................  14, 44
Monticello............................  *41
Ogden.................................  29, *34
Provo.................................  17c, *39
Salt Lake City........................  27, 28, 35, 38, 40, *42
St. George............................  9
------------------------------------------------------------------------


                                 Vermont
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Burlington............................  16, *32, 43, 53
Hartford..............................  25
Rutland...............................  *56
St. Johnsbury.........................  *18
Windsor...............................  *24
------------------------------------------------------------------------


                                Virginia
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Arlington.............................  15c
Ashland...............................  47
Bristol...............................  28
Charlottesville.......................  *14, 32
Danville..............................  41
Fairfax...............................  *57c
Front Royal...........................  *21
Goldvein..............................  *30
Grundy................................  49
Hampton...............................  41
Hampton-Norfolk.......................  *16c
Harrisonburg..........................  49
Lynchburg.............................  20, 56
Manassas..............................  43c
Marion................................  *42
Norfolk...............................  38, 46, 58
Norton................................  *32
Petersburg............................  22
Portsmouth............................  19, 31
Richmond..............................  *24c, 25, 26, *44, 54
Roanoke...............................  *3, 17, 18, 30, 36
Staunton..............................  *11
Virginia Beach........................  29
------------------------------------------------------------------------


[[Page 186]]


                               Washington
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Bellevue..............................  32, 50
Bellingham............................  19, 35
Centralia.............................  *19
Everett...............................  31
Kennewick.............................  44
Pasco.................................  18
Pullman...............................  *17
Richland..............................  26c, *38
Seattle...............................  25, 38, 39, *41, 44, 48
Spokane...............................  13, 15, 20, 30, 36, *39
Tacoma................................  14, 18, *27, 36, *42
Vancouver.............................  48
Wenatchee.............................  46
Yakima................................  14, 16, *21, 33
------------------------------------------------------------------------


                              West Virginia
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Bluefield.............................  14, 46
Charleston............................  19, 39, 41
Clarksburg............................  28, 52
Grandview.............................  *53
Huntington............................  23, *34c, 54
Lewisburg.............................  48
Martinsburg...........................  12
Morgantown............................  *33
Oak Hill..............................  50
Parkersburg...........................  49
Weston................................  58
Wheeling..............................  32
------------------------------------------------------------------------


                                Wisconsin
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Appleton..............................  59
Chippewa Falls........................  49c
Eagle River...........................  28
Eau Claire............................  15, 39
Fond Du Lac...........................  44
Green Bay.............................  23, 41, *42, 51, 56
Janesville............................  32
Kenosha...............................  40
La Crosse.............................  14, 17, *30, 53
Madison...............................  11, 19, *20, 26, 50
Manitowoc.............................  19
Mayville..............................  43
Menomonie.............................  *27
Milwaukee.............................  *8, 22, 25c, 28, 33, 34, *35,
                                         46, 61
Park Falls............................  *47
Racine................................  48
Rhinelander...........................  16
Superior..............................  19
Suring................................  21
Wausau................................  *24, 29, 40
------------------------------------------------------------------------


                                 Wyoming
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Casper................................  15c, 17, 18
Cheyenne..............................  11, 28c, 30
Jackson...............................  14
Lander................................  7, *8
Rawlins...............................  9
Riverton..............................  16
Rock Springs..........................  21
Sheridan..............................  21
------------------------------------------------------------------------


                                  Guam
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Agana.................................  2, 4, 5
Tamuning..............................  17
------------------------------------------------------------------------


                               Puerto Rico
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Aguada................................  62
Aguadilla.............................  17c, *34, 69
Arecibo...............................  53, 61c
Bayamon...............................  59c
Caguas................................  56, *57
Carolina..............................  51
Fajardo...............................  *16, 33
Guayama...............................  45
Humacao...............................  49
Mayaguez..............................  23c, 29, 35, 63
Naranjito.............................  65c
Ponce.................................  15c, 19, *25, 43c, 47, 66
San Juan..............................  21, 27c, 28, 31c, 32, *55c
San Sebastian.........................  39c
Yauco.................................  41c
------------------------------------------------------------------------


                             Virgin Islands
------------------------------------------------------------------------
               Community                           Channel No.
------------------------------------------------------------------------
Charlotte Amalie......................  *44, 48, 50
Christiansted.........................  5, 20
------------------------------------------------------------------------

    (c) Availability of channels. Applications may be filed to construct 
DTV broadcast stations only on the channels designated in the DTV Table 
of Allotments set forth in paragraph (b) of this section, and only in 
the communities listed therein. Applications that fail to comply with 
this requirement, whether or not accompanied by a petition to amend the 
DTV Table, will not be accepted for filing. However, applications 
specifying channels that accord with publicly announced FCC Orders 
changing the DTV Table of Allotments will be accepted for filing even if 
such applications are tendered before the effective dates of such 
channel change. An application for authority to construct a DTV station 
on an allotment in the initial DTV table may only be filed by the 
licensee or permittee of the analog TV station with which that initial 
allotment is paired, as set forth in Appendix B of the Memorandum 
Opinion and Order on Reconsideration of the Sixth Report and Order in MM 
Docket 87-268, FCC 98-24 (Memorandum Opinion and Order) adopted January 
29, 1998. Copies of the Memorandum Opinion and Order

[[Page 187]]

may be inspected during normal business hours at the: Federal 
Communications Commission, 1919 M St., NW., Dockets Branch (Room 239), 
Washington, DC, 20554. This document is also available through the 
Internet on the FCC Home Page at http://www.fcc.gov. Applications may 
also be filed to implement an exchange of channel allotments between two 
or more licensees or permittees of analog TV stations in the same 
community, the same market, or in adjacent markets provided, however, 
that the other requirements of this section and Sec. 73.623 are met with 
respect to each such application.
    (d) Reference points and distance computations. (1) The reference 
coordinates of a DTV allotment included in the initial DTV Table of 
Allotments are the coordinates of the authorized transmitting antenna 
site of the associated analog TV station, as set forth in Appendix B of 
the Memorandum Opinion and Order (referenced above). An application for 
authority to construct or modify DTV facilities on such an allotment may 
specify an alternate location for the DTV transmitting antenna that is 
within 5 kilometers of the DTV allotment reference coordinates without 
consideration of electromagnetic interference to other DTV or analog TV 
broadcast stations, allotments or applications, provided the application 
complies with paragraph (f)(2) of this section. Location of the 
transmitting antenna of such a station at a site more than 5 kilometers 
from the DTV allotment reference coordinates must comply with the 
provisions of section 73.623(c). In the case where a DTV station has 
been granted authority to construct more than 5 kilometers from its 
reference coordinates pursuant to section 73.623(c), and its authorized 
coverage area extends in any azimuthal direction beyond the DTV coverage 
area determined for the DTV allotment reference facilities, then the 
coordinates of such authorized site are to be used in addition to the 
coordinates of the DTV allotment to determine protection from new DTV 
allotments pursuant to Sec. 73.623(d) and from subsequent DTV 
applications filed pursuant to Sec. 73.623(c).
    (2) The reference coordinates of a DTV allotment not included in the 
initial DTV Table of Allotments shall be the authorized transmitter 
site, or, where such a transmitter site is not available for use as a 
reference point, the coordinates as designated in the FCC order 
modifying the DTV Table of Allotments.
    (e) DTV Service Areas. (1) The service area of a DTV station is the 
geographic area within the station's noise-limited F(50,90) contour 
where its signal strength is predicted to exceed the noise-limited 
service level. The noise-limited contour is the area in which the 
predicted F(50,90) field strength of the station's signal, in dB above 1 
microvolt per meter (dBu) as determined using the method in section 
73.625(b) exceeds the following levels (these are the levels at which 
reception of DTV service is limited by noise):

------------------------------------------------------------------------
                                                                  dBu
------------------------------------------------------------------------
Channels 2-6.................................................         28
Channels 7-13................................................         36
Channels 14-69...............................................         41
------------------------------------------------------------------------

    (2) Within this contour, service is considered available at 
locations where the station's signal strength, as predicted using the 
terrain dependent Longley-Rice point-to-point propagation model, exceeds 
the levels above. Guidance for evaluating coverage areas using the 
Longley-Rice methodology is provided in OET Bulletin No. 69. Copies of 
OET Bulletin No. 69 may be inspected during normal business hours at the 
Federal Communications Commission, 445 12th Street, S.W, Dockets Branch 
(Room CY A09257), Washington, DC 20554. This document is also available 
through the Internet on the FCC Home Page at http://www.fcc.gov.
    Note to paragraph (e)(2): During the transition, in cases where the 
assigned power of a UHF DTV station in the initial DTV Table is 1000 kW, 
the Grade B contour of the associated analog television station, as 
authorized on April 3, 1997, shall be used instead of the noise-limited 
contour of the DTV station in determining the DTV station's service 
area. In such cases, the DTV service area is the geographic area within 
the station's analog Grade B contour where its DTV signal strength is 
predicted to exceed the noise-limited service level, i.e., 41 dB, as 
determined using the Longley-Rice methodology.


[[Page 188]]


    (3) For purposes of determining whether interference is caused to a 
DTV station's service area, the maximum technical facilities, i.e., 
antenna height above average terrain (antenna HAAT) and effective 
radiated power (ERP), specified for the station's allotment are to be 
used in determining its service area.
    (f) DTV maximum power and antenna heights. (1) The maximum, or 
reference, effective radiated power (ERP) and antenna height above 
average terrain (antenna HAAT) for an allotment included in the initial 
DTV Table of Allotments are set forth in Appendix B of the Memorandum 
Opinion and Order (referenced in paragraph (c) of this section). In each 
azimuthal direction, the reference ERP value is based on the antenna 
HAAT of the corresponding analog TV station and achieving predicted 
coverage equal to that analog TV station's predicted Grade B contour, as 
defined in section 73.683.
    (2) An application for authority to construct or modify DTV 
facilities will not be subject to further consideration of 
electromagnetic interference to other DTV or analog TV broadcast 
stations, allotments or applications, provided that:
    (i) The proposed ERP in each azimuthal direction is equal to or less 
than the reference ERP in that direction; and
    (ii) The proposed antenna HAAT is equal to or less than the 
reference antenna HAAT or the proposed antenna HAAT exceeds the 
reference antenna HAAT by 10 meters or less and the reference ERP in 
paragraph (f)(2)(i) of this section is adjusted in accordance with 
paragraph (f)(3) of this section; and
    (iii) The application complies with the location provisions in 
paragraph (d)(1) of this section.
    (3)(i) A DTV station may increase its antenna HAAT by up to 10 
meters from that specified in Appendix B if it reduces its DTV power to 
a level at or below the level of adjusted DTV power computed in the 
following formula:

ERP adjustment in dB = 20log(H1/H2)
Where H1 = Reference antenna HAAT specified in the DTV Table, 
and H2 = Actual antenna HAAT

    (ii) Alternatively, a DTV application that specifies an antenna HAAT 
within 25 meters below that specified in Appendix B may adjust its power 
upward to a level at or below the adjusted DTV power in accordance with 
the formula in paragraph (f)(3)(i) of this section without an 
interference showing. For a proposed antenna more than 25 meters below 
the reference antenna HAAT, the DTV station may increase its ERP up to 
the level permitted for operation with an antenna that is 25 meters 
below the station's reference antenna HAAT.
    (4) UHF DTV stations may request an increase in power, up to a 
maximum of 1000 kW ERP, to enhance service within their authorized 
service area through use of antenna beam tilting in excess of 1 degree, 
as follows:
    (i) Field strengths at the outer edge of the station's service area 
shall be no greater than the levels that would exist if the station were 
operating at its assigned DTV power.
    (ii) Where a station operates at higher power under the provisions 
of this paragraph, its field strengths at the edge of its service area 
are to be calculated assuming 1 dB of additional antenna gain over the 
antenna gain pattern specified by the manufacturer.
    (iii) Where a first adjacent channel DTV station or allotment is 
located closer than 110 km or a first adjacent channel analog TV station 
is located closer than 106 km from the proposed transmitter site, the 
application must be accompanied by a technical showing that the proposed 
operation complies with the technical criteria in Sec. 73.623(c) and 
thereby will not result in new interference exceeding the de minimis 
standard for new interference set forth in that section, or statements 
from affected stations agreeing to the proposed operation in accordance 
with Sec. 73.623(f).
    (iv) A licensee desiring to operate at higher power under these 
provisions shall submit, with its initial application for a DTV 
construction permit or subsequent application to modify its DTV 
facilities, an engineering analysis demonstrating that the predicted 
field strengths and predicted interference within its service area would 
comport with the requirements of this paragraph. The licensee also must 
notify, by certified mail, all stations that

[[Page 189]]

could potentially be affected by such operation at the time the station 
files its application for a construction permit or modification of 
facilities. Potentially affected stations to be notified include 
stations on co-channel and first-adjacent channel allotments that are 
located at distances less than the minimum geographic spacing 
requirements in Sec. 73.623(d)(2). For example, in Zone I a co-channel 
DTV station within 196.3 km or a first-adjacent channel DTV station 
within 110 km must be notified. A station that believes that its service 
is being affected beyond the de minimis standard set forth in 
Sec. 73.623(c) may file an informal objection with the Commission. Such 
an informal objection shall include an engineering analysis 
demonstrating that additional impermissible interference would occur. 
The Commission may condition grant of authority to operate at increased 
power pursuant to this provision on validation of actual performance 
through field measurements.
    (5) Licensees and permittees assigned a DTV channel in the initial 
DTV Table of Allotments may request an increase in either ERP in some 
azimuthal direction or antenna HAAT, or both, that exceed the initial 
technical facilities specified for the allotment in Appendix B of the 
Memorandum Opinion and Order (referenced in paragraph (c) of this 
section), up to the maximum permissible limits on DTV power and antenna 
height set forth in paragraph (f)(6), (f)(7), or (f)(8) of this section, 
as appropriate, or up to that needed to provide the same geographic 
coverage area as the largest station within their market, whichever 
would allow the largest service area. Such requests must be accompanied 
by a technical showing that the increase complies with the technical 
criteria in Sec. 73.623(c), and thereby will not result in new 
interference exceeding the de minimis standard set forth in that 
section, or statements agreeing to the change from any co-channel or 
adjacent channel stations that might be affected by potential new 
interference, in accordance with Sec. 73.623(f). In the case where a DTV 
station has been granted authority to construct pursuant to 
Sec. 73.623(c), and its authorized coverage area extends in any 
azimuthal direction beyond the DTV coverage area determined for the DTV 
allotment reference facilities, then the authorized DTV facilities are 
to be used in addition to the assumed facilities of the initial DTV 
allotment to determine protection from new DTV allotments pursuant to 
Sec. 73.623(d) and from subsequent DTV applications filed pursuant to 
Sec. 73.623(c). The provisions of this paragraph regarding increases in 
the ERP or antenna height of DTV stations on channels in the initial DTV 
Table of Allotments shall also apply in cases where the licensee or 
permittee seeks to change the station's channel as well as alter its ERP 
and antenna HAAT. Licensees and permittees are advised that where a 
channel change is requested, it may, in fact, be necessary in specific 
cases for the station to operate with reduced power, a lower antenna, or 
a directional antenna to avoid causing new interference to another 
station.
    (6) A DTV station that operates on a channel 2-6 allotment created 
subsequent to the initial DTV Table will be allowed a maximum ERP of 10 
kW if its antenna HAAT is at or below 305 meters and it is located in 
Zone I or a maximum ERP of 45 kW if its antenna HAAT is at or below 305 
meters and it is located in Zone II or Zone III. A DTV station that 
operates on a channel 2-6 allotment included in the initial DTV Table of 
Allotments may request an increase in power and/or antenna HAAT up to 
these maximum levels, provided the increase also complies with the 
provisions of paragraph (f)(5) of this section.
    (i) At higher HAAT levels, such DTV stations will be allowed to 
operate with lower maximum ERP levels in accordance with the following 
table and formulas (the allowable maximum ERP for intermediate values of 
HAAT is determined using linear interpolation based on the units 
employed in the table):

Maximum Allowable ERP and Antenna Height for DTV Stations In Zones II or
                           III on Channels 2-6
------------------------------------------------------------------------
                   Antenna HAAT (meters)                       ERP (kW)
------------------------------------------------------------------------
610........................................................           10
580........................................................           11
550........................................................           12

[[Page 190]]

 
520........................................................           14
490........................................................           16
460........................................................           19
425........................................................           22
395........................................................           26
365........................................................           31
335........................................................           37
305........................................................           45
------------------------------------------------------------------------

    (ii) For DTV stations located in Zone I that operate on channels 2-6 
with an HAAT that exceeds 305 meters, the allowable maximum ERP 
expressed in decibels above 1 kW (dBk) is determined using the following 
formula, with HAAT expressed in meters:

ERPmax=92.57-33.24*log10(HAAT)

    (iii) For DTV stations located in Zone II or III that operate on 
channels 2-6 with an HAAT that exceeds 610 meters, the allowable maximum 
ERP expressed in decibels above 1 kW (dBk) is determined using the 
following formula, with HAAT expressed in meters:

    ERPmax=57.57-17.08*log10(HAAT)

    (7) A DTV station that operates on a channel 7-13 allotment created 
subsequent to the initial DTV Table will be allowed a maximum ERP of 30 
kW if its antenna HAAT is at or below 305 meters and it is located in 
Zone I or a maximum ERP of 160 kW if its antenna HAAT is at or below 305 
meters and it is located in Zone II or Zone III. A DTV station that 
operates on a channel 7-13 allotment included in the initial DTV Table 
of Allotments may request an increase in power and/or antenna HAAT up to 
these maximum levels, provided the increase also complies with the 
provisions of paragraph (f)(5) of this section.
    (i) At higher HAAT levels, such DTV stations will be allowed to 
operate with lower maximum ERP levels in accordance with the following 
table and formulas (the allowable maximum ERP for intermediate values of 
HAAT is determined using linear interpolation based on the units 
employed in the table):

Maximum Allowable ERP and Antenna Height for DTV Stations In Zones II or
                          III on Channels 7-13
------------------------------------------------------------------------
                   Antenna HAAT (meters)                       ERP (kW)
------------------------------------------------------------------------
610........................................................           30
580........................................................           34
550........................................................           40
520........................................................           47
490........................................................           54
460........................................................           64
425........................................................           76
395........................................................           92
365........................................................          110
335........................................................          132
305........................................................          160
------------------------------------------------------------------------

    (ii) For DTV stations located in Zone I that operate on channels 7-
13 with an HAAT that exceeds 305 meters, the allowable maximum ERP 
expressed in decibels above 1 kW (dBk) is determined using the following 
formula, with HAAT expressed in meters:

ERPmax=97.35-33.24*log10(HAAT)

    (iii) For DTV stations located in Zone II or III that operate on 
channels 7-13 with an HAAT that exceeds 610 meters, the allowable 
maximum ERP expressed in decibels above 1 kW (dBk) is determined using 
the following formula, with HAAT expressed in meters:

ERPmax=62.34-17.08*log10(HAAT)

    (8) A DTV station that operates on a channel 14-59 allotment created 
subsequent to the initial DTV Table will be allowed a maximum ERP of 
1000 kW if their antenna HAAT is at or below 365 meters. A DTV station 
that operates on a channel 14-59 allotment included in the initial DTV 
Table of Allotments may request an increase in power and/or antenna HAAT 
up to these maximum levels, provided the increase also complies with the 
provisions of paragraph (f)(5) of this section.
    (i) At higher HAAT levels, such DTV stations will be allowed to 
operates with lower maximum ERP levels in accordance with the following 
table and formulas (the allowable maximum ERP for intermediate values of 
HAAT is determined using linear interpolation based on the units 
employed in the table):

[[Page 191]]



Maximum Allowable ERP and Antenna Height for DTV Stations on Channels 14-
                              59, All Zones
------------------------------------------------------------------------
                   Antenna HAAT (meters)                       ERP (kW)
------------------------------------------------------------------------
610........................................................          316
580........................................................          350
550........................................................          400
520........................................................          460
490........................................................          540
460........................................................          630
425........................................................          750
395........................................................          900
365........................................................         1000
------------------------------------------------------------------------

    (ii) For DTV stations located in Zone I, II or III that operate on 
channels 14-59 with an HAAT that exceeds 610 meters, the allowable 
maximum ERP expressed in decibels above 1 kW (dBk) is determined using 
the following formula, with HAAT expressed in meters:

ERPmax=72.57-17.08*log10(HAAT)

    (g) DTV stations operating on channels above an analog TV station. 
(1) DTV stations operating on a channel allotment designated with a 
``c'' in paragraph (b) of this section must maintain the pilot carrier 
frequency of the DTV signal 5.082138 MHz above the visual carrier 
frequency of any analog TV broadcast station that operates on the lower 
adjacent channel and is located within 88 kilometers. This frequency 
difference must be maintained within a tolerance of 3 Hz.
    (2) Unless it conflicts with operation complying with paragraph 
(g)(1) of this section, where a low power television station or TV 
translator station is operating on the lower adjacent channel within 32 
km of the DTV station and notifies the DTV station that it intends to 
minimize interference by precisely maintaining its carrier frequencies, 
the DTV station shall cooperate in locking its carrier frequency to a 
common reference frequency and shall be responsible for any costs 
relating to its own transmission system in complying with this 
provision.
    (h)(1) The power level of emissions on frequencies outside the 
authorized channel of operation must be attenuated no less than the 
following amounts below the average transmitted power within the 
authorized channel. In the first 500 kHz from the channel edge the 
emissions must be attenuated no less than 47 dB. More than 6 MHz from 
the channel edge, emissions must be attenuated no less than 110 dB. At 
any frequency between 0.5 and 6 MHz from the channel edge, emissions 
must be attenuated no less than the value determined by the following 
formula:

Attenuation in dB = -11.5(f + 3.6);
Where: f = frequency difference in MHz from the edge of the 
channel.

    (2) This attenuation is based on a measurement bandwidth of 500 kHz. 
Other measurement bandwidths may be used as long as appropriate 
correction factors are applied. Measurements need not be made any closer 
to the band edge than one half of the resolution bandwidth of the 
measuring instrument. Emissions include sidebands, spurious emissions 
and radio frequency harmonics. Attenuation is to be measured at the 
output terminals of the transmitter (including any filters that may be 
employed). In the event of interference caused to any service, greater 
attenuation may be required.

[62 FR 26712, May 14, 1997, as amended at 63 FR 13552, Mar. 20, 1998; 64 
FR 47702, Sept. 1, 1999]



Sec. 73.623  DTV applications and changes to DTV allotments.

    (a) General. This section contains the technical criteria for 
evaluating applications requesting DTV facilities that do not conform to 
the provisions of Sec. 73.622 and petitions for rule making to amend the 
DTV Table of Allotments (Sec. 73.622(b)). Petitions to amend the DTV 
Table (other than those also expressly requesting amendment of this 
section) and applications for new DTV broadcast stations or for changes 
in authorized DTV stations filed pursuant to this section will not be 
accepted for filing if they fail to comply with the requirements of this 
section.
    (b) In considering petitions to amend the DTV Table and applications 
filed pursuant to this section, the Commission will use geographic 
coordinates defined in Sec. 73.622(d) as reference points in determining 
allotment separations and evaluating interference potential.
    (c) Minimum technical criteria for modification of DTV allotments 
included in the initial DTV Table of Allotments and for applications 
filed pursuant to this section. No petition to modify a channel 
allotment included in the initial DTV Table

[[Page 192]]

of Allotments or application for authority to construct or modify a DTV 
station assigned to such an allotment, filed pursuant to this section, 
will be accepted unless it shows compliance with the requirements of 
this paragraph.
    (1) Requests filed pursuant to this paragraph must demonstrate 
compliance with the principal community coverage requirements of section 
73.625(a).
    (2) Requests filed pursuant to this paragraph must demonstrate that 
the requested change would not result in more than an additional 2 
percent the population served by another station being subject to 
interference; provided, however, that no new interference may be caused 
to any station that already experiences interference to 10 percent or 
more of its population or that would result in a station receiving 
interference in excess of 10 percent of its population. The station 
population values for existing NTSC service and DTV service contained in 
Appendix B of the Memorandum Opinion and Order on Reconsideration of the 
Sixth Report and Order in MM Docket No. 87-268, FCC 98-24, adopted 
January 29, 1998, referenced in Sec. 73.622(c), are to be used for the 
purposes of determining whether a power increase or other change is 
permissible under this de minimis standard. For evaluating compliance 
with this requirement, interference to populations served is to be 
predicted based on the procedure set forth in OET Bulletin No. 69, 
including population served within service areas determined in 
accordance with section 73.622(e), consideration of whether F(50,10) 
undesired signals will exceed the following desired-to-undesired (D/U) 
signal ratios, assumed use of a directional receiving antenna, and use 
of the terrain dependent Longley-Rice point-to-point propagation model. 
Copies of OET Bulletin No. 69 may be inspected during normal business 
hours at the: Federal Communications Commission, 1919 M St., NW., 
Dockets Branch (Room 239), Washington, DC 20554. These documents are 
also available through the Internet on the FCC Home Page at http://
www.fcc.gov. The threshold levels at which interference is considered to 
occur are:

------------------------------------------------------------------------
                                                              D/U Ratio
------------------------------------------------------------------------
Co-channel:
  DTV-into-analog TV.......................................          +34
  Analog TV-into-DTV.......................................           +2
  DTV-into-DTV.............................................          +15
First Adjacent Channel:
  Lower DTV-into-analog TV.................................          -14
  Upper DTV-into-analog TV.................................          -17
  Lower analog TV-into-DTV.................................          -48
  Upper analog TV-into-DTV.................................          -49
  Lower DTV-into-DTV.......................................          -28
  Upper DTV-into-DTV.......................................          -26
 
Other Adjacent Channel (Channels 14-69 only)
 
DTV-into-analog TV, where N = analog TV channel and DTV
 Channel:
  N-2......................................................          -24
  N+2......................................................          -28
  N-3......................................................          -30
  N+3......................................................          -34
  N-4......................................................          -34
  N+4......................................................          -25
  N-7......................................................          -35
  N+7......................................................          -43
  N-8......................................................          -32
  N+8......................................................          -43
  N+14.....................................................          -33
  N+15.....................................................          -31
------------------------------------------------------------------------

    (3) The values in paragraph (c)(2) of this section for co-channel 
interference to DTV service are only valid at locations where the 
signal-to-noise ratio is 28 dB or greater for interference from DTV and 
25 dB or greater for interference from analog TV service. At the edge of 
the noise-limited service area, where the signal-to-noise (S/N) ratio is 
16 dB, these values are 21 dB and 23 dB for interference from analog TV 
and DTV, respectively. At locations where the S/N ratio is greater than 
16 dB but less than 28 dB, D/U values for co-channel interference to DTV 
are as follows:
    (i) For DTV-to-DTV interference, the minimum D/U ratios are computed 
from the following formula:

D/U = 15+10log10[1.0/(1.0-10-x/10)]
Where x = S/N-15.19 (minimum signal to noise ratio)

    (ii) For analog-to-DTV interference, the minimum D/U ratios are 
found from the following Table (for values between measured values, 
linear interpolation can be used):

------------------------------------------------------------------------
                                                             Desired-to-
                 Signal-to-noise ratio (dB)                   undesired
                                                              ratio (dB)
------------------------------------------------------------------------
16.00......................................................        21.00
16.35......................................................        19.94
17.35......................................................        17.69
18.35......................................................        16.44
19.35......................................................         7.19
20.35......................................................         4.69

[[Page 193]]

 
21.35......................................................         3.69
22.35......................................................         2.94
23.35......................................................         2.44
25.00......................................................         2.00
------------------------------------------------------------------------

    (4) Due to the frequency spacing that exists between Channels 4 and 
5, between Channels 6 and 7, and between Channels 13 and 14, the minimum 
adjacent channel technical criteria specified in paragraph (c)(2) of 
this section shall not be applicable to these pairs of channels (see 
Sec. 73.603(a)).
    (d) Minimum geographic spacing requirements for DTV allotments not 
included in the initial DTV Table of Allotments. No petition to add a 
new channel to the DTV Table of Allotments or modify an allotment not 
included in the initial DTV Table will be accepted unless it shows 
compliance with the requirements of this paragraph.
    (1) Requests filed pursuant to this paragraph must demonstrate 
compliance with the principle community coverage requirements of section 
73.625(a).
    (2) Requests filed pursuant to this paragraph must meet the 
following requirements for geographic spacing with regard to all other 
DTV stations, DTV allotments and analog TV stations:

------------------------------------------------------------------------
             Channel relationship                Separation requirement
------------------------------------------------------------------------
VHF Channels 2-13:
    Co-channel, DTV to DTV
                                               Zone I: 244.6 km.
                                               Zones II & III: 273.6 km.
    Co-channel, DTV to analog TV
                                               Zone I: 244.6 km.
                                               Zone II & III: 273.6 km.
Adjacent Channel:
    DTV to DTV...............................  No allotments permitted
                                                between:
                                               Zone I: 20 km and 110 km.
                                               Zones II & III: 23 km and
                                                110 km.
    DTV to analog TV.........................  No allotments permitted
                                                between:
                                               Zone I: 9 km and 125 km.
                                               Zone II & III: 11 km and
                                                125 km.
UHF Channels:
    Co-channel, DTV to DTV
                                               Zone I: 196.3 km.
                                               Zone II & III: 223.7 km.
    Co-channel, DTV to analog TV
                                               Zone I: 217.3 km.
                                               Zone II & III: 244.6 km.
Adjacent Channel:
    DTV to DTV...............................  No allotments permitted
                                                between:
                                               All Zones: 24 km and 110
                                                km.
    DTV to analog TV.........................  No allotments permitted
                                                between:
                                               All Zones: 12 km and 106
                                                km.
    Taboo Channels, DTV to analog TV only      No allotments permitted
     (DTV channels +/-2, +/-3, +/-4, +/-7, +/-  between:
     8, and 14 or 15 channels above the        Zone I: 24.1 km and 80.5
     analog TV channel).                        km.
                                               Zone II & III: 24.1 km
                                                and 96.6 km.
------------------------------------------------------------------------

    (3) Zones are defined in Sec. 73.609. The minimum distance 
separation between a DTV station in one zone and an analog TV or DTV 
station in another zone shall be that of the zone requiring the lower 
separation.
    (4) Due to the frequency spacing that exists between Channels 4 and 
5, between Channels 6 and 7, and between Channels 13 and 14, the minimum 
geographic spacing requirements specified in paragraph (d)(3) of this 
section shall not be applicable to these pairs of channels 
(Sec. 73.603(a)).
    (e) Protection of land mobile operations on channels 14-20. The 
Commission will not accept petitions to amend the DTV Table of 
Allotments, applications for new DTV stations, or applications to change 
the channel or location of authorized DTV stations that would use 
channels 14-20 where the distance between the DTV reference point as 
defined in section 73.622(d), would be located less than 250 km from the 
city center of a co-channel land mobile operation or 176 km from the 
city center

[[Page 194]]

of an adjacent channel land mobile operation. Petitions to amend the DTV 
Table, applications for new DTV stations, or requests to modify the DTV 
Table that do not meet the minimum DTV-to-land mobile spacing standards 
will, however, be considered where all affected land mobile licensees 
consent to the requested action. Land mobile operations are authorized 
on these channels in the following markets:

----------------------------------------------------------------------------------------------------------------
              City                          Channels                      Latitude                 Longitude
----------------------------------------------------------------------------------------------------------------
Boston, MA.....................  14, 16.......................  42 deg.21'24"                 71 deg.03'25"
Chicago, IL....................  14, 15.......................  41 deg.52'28"                 87 deg.38'22"
Dallas, TX.....................  16...........................  32 deg.47'09"                 96 deg.47'37"
Houston, TX....................  17...........................  29 deg.45'26"                 95 deg.21'37"
Los Angeles, CA................  14, 16, 20...................  34 deg.03'15"                 118 deg.14'28"
Miami, FL......................  14...........................  25 deg.46'37"                 80 deg.11'32"
New York, NY...................  14, 15.......................  40 deg.45'06"                 73 deg.59'39"
Philadelphia, PA...............  19, 20.......................  39 deg.56'58"                 75 deg.09'21"
Pittsburgh, PA.................  14, 18.......................  40 deg.26'19"                 80 deg.00'00"
San Francisco, CA..............  16, 17.......................  37 deg.46'39"                 122 deg.24'40"
Washington, DC.................  17, 18.......................  38 deg.53'51"                 77 deg.00'33"
----------------------------------------------------------------------------------------------------------------

    (f) Parties requesting new allotments on channel 6 be added to the 
DTV Table must submit an engineering study demonstrating that no 
interference would be caused to existing FM radio stations on FM 
channels 200-220.
    (g) Negotiated agreements on interference. Notwithstanding the 
minimum technical criteria for DTV allotments specified above, DTV 
stations operating on allotments that are included in the initial DTV 
Table may: operate with increased ERP and/or antenna HAAT that would 
result in additional interference to another DTV station or an analog TV 
station if that station agrees, in writing, to accept the additional 
interference; and/or implement an exchange of channel allotments between 
two or more licensees or permittees of TV stations in the same 
community, the same market, or in adjacent markets provided, however, 
that the other requirements of this section and of section 73.622 are 
met with respect to each such application. Such agreements must be 
submitted with the application for authority to construct or modify the 
affected DTV station or stations. The larger service area resulting from 
a negotiated change in ERP and/or antenna HAAT will be protected in 
accordance with the provisions of paragraph (c) of this section. 
Negotiated agreements under this paragraph can include the exchange of 
money or other considerations from one station to another, including 
payments to and from noncommercial television stations assigned reserved 
channels. Applications submitted pursuant to the provisions of this 
paragraph will be granted only if the Commission finds that such action 
is consistent with the public interest.

[62 FR 26719, May 14, 1997, as amended at 63 FR 13560, Mar. 20, 1998; 64 
FR 4327, Jan. 28, 1999]



Sec. 73.624  Digital television broadcast stations.

    (a) Digital television (``DTV'') broadcast stations are assigned 
channels 6 MHz wide. Initial eligibility for licenses for DTV broadcast 
stations is limited to persons that, as of April 3, 1997, are licensed 
to operate a full power television broadcast station or hold a permit to 
construct such a station (or both).
    (b) At any time that a DTV broadcast station permittee or licensee 
transmits a video program signal on its analog television channel, it 
must also transmit at least one over-the-air video program signal at no 
direct charge to viewers on the DTV channel that is licensed to the 
analog channel, provided that, before the date on which DTV station is 
required to be constructed under paragraph (d) of this section, the DTV 
broadcast station permittee or licensee is not subject to any minimum 
schedule for operation on the DTV channel. The DTV service that is 
provided pursuant to this paragraph must be at least comparable in 
resolution to the analog television station programming transmitted to 
viewers on the

[[Page 195]]

analog channel, but subject to paragraph (f) of this section, DTV 
broadcast stations are not required to simulcast the analog programming.
    (c) Provided that DTV broadcast stations comply with paragraph (b) 
of this section, DTV broadcast stations are permitted to offer services 
of any nature, consistent with the public interest, convenience, and 
necessity, on an ancillary or supplementary basis. The kinds of services 
that may be provided include, but are not limited to computer software 
distribution, data transmissions, teletext, interactive materials, aural 
messages, paging services, audio signals, subscription video, and any 
other services that do not derogate DTV broadcast stations' obligations 
under paragraph (b) of this section. Such services may be provided on a 
broadcast, point-to-point or point-to-multipoint basis, provided, 
however, that any video broadcast signal provided at no direct charge to 
viewers shall not be considered ancillary or supplementary.
    (1) DTV licensees that provide ancillary or supplementary services 
that are analogous to other services subject to regulation by the 
Commission must comply with the Commission regulations that apply to 
those services, provided, however, that no ancillary or supplementary 
service shall have any rights to carriage under Secs. 614 or 615 of the 
Communications Act of 1934, as amended, or be deemed a multichannel 
video programming distributor for purposes of section 628 of the 
Communications Act of 1934, as amended.
    (2) In all arrangements entered into with outside parties affecting 
service operation, the DTV licensee or permittee must retain control 
over all material transmitted in a broadcast mode via the station's 
facilities, with the right to reject any material in the sole judgement 
of the permitte or licensee. The license or permittee is also 
responsible for all aspects of technical operation involving such 
telecommunications services.
    (3) In any application for renewal of a broadcast license for a 
television station that provides ancillary or supplementary services, a 
licensee shall establish that all of its program services on the analog 
and the DTV spectrum are in the public interest. Any violation of the 
Commission's rules applicable to ancillary or supplementary services 
will reflect on the licensee's qualifications for renewal of its 
license.
    (d) Digital television broadcast facilities that comply with the FCC 
DTV Standard (section 73.682(d)), shall be constructed in the following 
markets by the following dates:
    (1)(i) May 1, 1999: all network-affiliated television stations in 
the top ten television markets;
    (ii) November 1, 1999: all network-affiliated television stations 
not included in category (1)(i) and in the top 30 television markets;
    (iii) May 1, 2002: all remaining commercial television stations;
    (iv) May 1, 2003: all noncommercial television stations.
    (2) For the purposes of paragraph (d)(1):
    (i) The term, ``network,'' is defined to include the ABC, CBS, NBC, 
and Fox television networks;
    (ii) The term, ``television market,'' is defined as the Designated 
Market Area or DMA as defined by Nielsen Media Research as of April 3, 
1997; and
    (iii) The terms, ``network-affiliated'' or ``network-affiliate,'' 
are defined to include those television stations affiliated with at 
least one of the four networks designated in paragraph (d)(2)(i) as of 
April 3, 1997. In those DMAs in which a network has more than one 
network affiliate, paragraphs (d)(1) (i) and (ii) of this section shall 
apply to its network affiliate with the largest audience share for the 9 
a.m. to midnight time period as measured by Nielsen Media Research in 
its Nielsen Station Index, Viewers in Profile, as of February, 1997.
    (3) Authority delegated. (i) Authority is delegated to the Chief, 
Mass Media Bureau to grant an extension of time of up to six months 
beyond the relevant construction deadline specified in paragraph (d)(1) 
of this section upon demonstration by the DTV licensee or permittee that 
failure to meet that construction deadline is due to circumstances that 
are either unforeseeable or beyond the licensee's control where the 
licensee has taken all reasonable steps to resolve the problem 
expeditiously.

[[Page 196]]

    (ii) Such circumstances shall include, but shall not be limited to: 
(a) inability to construct and place in operation a facility necessary 
for transmitting digital television, such as a tower, because of delays 
in obtaining zoning or FAA approvals, or similar constraints; or (b) the 
lack of equipment necessary to obtain a digital television signal.
    (iii) The Bureau may grant no more than two extension requests upon 
delegated authority. Subsequent extension requests shall be referred to 
the Commission. The Bureau may not on delegated authority deny an 
extension request but must refer recommended denials to the Commission.
    (iv) Applications for extension of time shall be filed at least 30 
days prior to the relevant construction deadline, absent a showing of 
sufficient reasons for filing within less than 30 days of the relevant 
construction deadline.
    (e) The application for construction permit must be filed on Form 
301 (except for noncommercial stations, which must file on Form 340) on 
or before the date on which half of the construction period has elapsed. 
Thus, for example, for applicants in category (d)(1)(i), the application 
for construction period must be filed by May 1, 1998.
    (f)(i) Commencing on April 1, 2003, DTV television licensees and 
permittees must simulcast 50 percent of the video programming of the 
analog channel on the DTV channel.
    (ii) Commencing on April 1, 2004, DTV licensees and permittees must 
simulcast 75% of the video programming of the analog channel on the DTV 
channel.
    (iii) Commencing on April 1, 2005, DTV licensees and permittees must 
simulcast 100% of the video programming of the analog channel on the DTV 
channel.
    (iv) The simulcasting requirements imposed in paragraphs (f) (i)-
(iii) of this section will terminate when the analog channel terminates 
operation and a 6 MHz channel is returned by the DTV licensee or 
permittee to the Commission.
    (g) Commercial DTV licensees must annually remit a fee of five 
percent of the gross revenues derived from all ancillary or 
supplementary services, as defined by paragraph (b) hereof, which are 
feeable, as defined in paragraphs (i) through (ii) hereof.
    (1)(i) All ancillary or supplementary services for which payment of 
a subscription fee or charge is required in order to receive the service 
are feeable. The fee required by this provision shall be imposed on any 
and all revenues from such services, including revenues derived from 
subscription fees and from any commercial advertisements transmitted on 
the service.
    (ii) Any ancillary or supplementary service for which no payment is 
required from consumers in order to receive the service is feeable if 
the DTV licensee directly or indirectly receives compensation from a 
third party in return for the transmission of material provided by that 
third party (other than commercial advertisements used to support 
broadcasting for which a subscription fee is not required). The fee 
required by this provision shall be imposed on any and all revenues from 
such services, other than revenues received from a third party in return 
for the transmission of commercial advertisements used to support 
broadcasting for which a subscription fee is not required.
    (2) Payment of fees. (i) Each December 1, all commercial DTV 
licensees will electronically report whether they provided ancillary or 
supplementary services in the twelve-month period ending on the 
preceding September 30. Licensees will further report, for the 
applicable period: (A) a brief description of the services provided; (B) 
which services were feeable ancillary or supplementary services; (C) 
whether any ancillary or supplementary services provided were not 
subject to a fee; (D) gross revenues received from all feeable ancillary 
and supplementary services provided during the applicable period; and 
(E) the amount of bitstream used to provide ancillary or supplementary 
services during the applicable period. Licensees will certify under 
penalty of perjury the accuracy of the information reported. Failure to 
file regardless of revenues from ancillary or supplementary services or 
provision of such services may result in appropriate sanctions.

[[Page 197]]

    (ii) If a commercial DTV licensee has provided feeable ancillary or 
supplementary services at any point during a twelve-month period ending 
on September 30, the licensee must additionally file the FCC's standard 
remittance form (Form 159) on the subsequent December 1. Licensees will 
certify the amount of gross revenues received from feeable ancillary or 
supplementary services for the applicable twelve-month period and will 
remit the payment of the required fee.
    (iii) The Commission reserves the right to audit each licensee's 
records which support the calculation of the amount specified on line 
23A of Form 159. Each licensee, therefore, is required to retain such 
records for three years from the date of remittance of fees.

[62 FR 26989, May 16, 1997, as amended at 63 FR 15784, Apr. 1, 1998; 63 
FR 69216, Dec. 16, 1998; 64 FR 4327, Jan. 28, 1999]



Sec. 73.625   DTV coverage of principal community and antenna system.

    (a) Transmitter location.
    (1) The DTV transmitter location shall be chosen so that, on the 
basis of the effective radiated power and antenna height above average 
terrain employed, the following minimum F (50,90) field strength in dB 
above one uV/m will be provided over the entire principal community to 
be served:


------------------------------------------------------------------------
 
------------------------------------------------------------------------
Channels 2-6..................................................   L28 dBu
Channels 7-13.................................................    36 dBu
Channels 14-69................................................    41 dBu
------------------------------------------------------------------------


    (2) The location of the antenna must be so chosen that there is not 
a major obstruction in the path over the principal community to be 
served.
    (3) For the purposes of this section, coverage is to be determined 
in accordance with paragraph (b) of this section. Under actual 
conditions, the true coverage may vary from these estimates because the 
terrain over any specific path is expected to be different from the 
average terrain on which the field strength charts were based. Further, 
the actual extent of service will usually be less than indicated by 
these estimates due to interference from other stations. Because of 
these factors, the predicted field strength contours give no assurance 
of service to any specific percentage of receiver locations within the 
distances indicated.
    (b) Determining coverage. (1) In predicting the distance to the 
field strength contours, the F (50,50) field strength charts (Figures 9, 
10 and 10b of Sec. 73.699 of this part) and the F (50,10) field strength 
charts (Figures 9a, 10a and 10c of Sec. 73.699 of this part) shall be 
used. To use the charts to predict the distance to a given F (50,90) 
contour, the following procedure is used: Convert the effective radiated 
power in kilowatts for the appropriate azimuth into decibel value 
referenced to 1 kW (dBk). Subtract the power value in dBk from the 
contour value in dBu. Note that for power less than 1 kW, the difference 
value will be greater than the contour value because the power in dBk is 
negative. Locate the difference value obtained on the vertical scale at 
the left edge of the appropriate F (50,50) chart for the DTV station's 
channel. Follow the horizontal line for that value into the chart to the 
point of intersection with the vertical line above the height of the 
antenna above average terrain for the appropriate azimuth located on the 
scale at the bottom of the chart. If the point of intersection does not 
fall exactly on a distance curve, interpolate betweenthe distance curves 
below and above the intersection point. The distance values for the 
curves are located along the right edge of the chart. Using the 
appropriate F (50,10) chart for the DTV station's channel, locate the 
point where the distance coincides with the vertical line above the 
height of the antenna above average terrain for the appropriate azimuth 
located on the scale at the bottom of the chart. Follow a horizontal 
line from that point to the left edge of the chart to determine the F 
(50,10) difference value. Add the power value in dBk to this difference 
value to determine the F (50,10) contour value in dBu. Subtract the F 
(50,50) contour value in dBu from this F (50,10) contour value in dBu. 
Subtract this difference from the F (50,50) contour value in dBu to 
determine the F (50,90) contour value in dBu at the pertinent distance 
along the pertinent radial.

[[Page 198]]

    (2) The effective radiated power to be used is that radiated at the 
vertical angle corresponding to the depression angle between the 
transmitting antenna center of radiation and the radio horizon as 
determined individually for each azimuthal direction concerned. In cases 
where the relative field strength at this depression angle is 90% or 
more of the maximum field strength developed in the vertical plane 
containing the pertaining radial, the maximum radiation shall be used. 
The depression angle is based on the difference in elevation of the 
antenna center of radiation above the average terrain and the radio 
horizon, assuming a smooth spherical earth with a radius of 8,495.5 
kilometers (5,280 miles) and shall be determined by the following 
equation:

A = 0.0277 square root of H
Where:
A is the depression angle in degrees.
H is the height in meters of the transmitting antenna radiation center 
above average terrain of the 3.2-16.1 kilometers (2-10 miles) sector of 
the pertinent radial.
    This formula is empirically derived for the limited purpose 
specified here. Its use for any other purpose may be inappropriate.

    (3) Applicants for new DTV stations or changes in the facilities of 
existing DTV stations must submit to the FCC a showing as to the 
location of their stations' or proposed stations' contour. This showing 
is to include a map showing this contour, except where applicants have 
previously submitted material to the FCC containing such information and 
it is found upon careful examination that the contour locations 
indicated therein would not change, on any radial, when the locations 
are determined under this section. In the latter cases, a statement by a 
qualified engineer to this effect will satisfy this requirement and no 
contour maps need be submitted.
    (4) The antenna height to be used with these charts is the height of 
the radiation center of the antenna above the average terrain along the 
radial in question. In determining the average elevation of the terrain, 
the elevations between 3.2-16.1 kilometers (2-10 miles) from the antenna 
site are employed. Profile graphs shall be drawn for 8 radials beginning 
at the antenna site and extending 16.1 kilometers (10 miles) therefrom. 
The radials should be drawn for each 45 degrees of azimuth starting with 
True North. At least one radial must include the principal community to 
be served even though such community may be more than 16.1 kilometers 
(10 miles) from the antenna site. However, in the event none of the 
evenly spaced radials include the principal community to be served and 
one or more such radials are drawn in addition to the 8 evenly spaced 
radials, such additional radials shall not be employed in computing the 
antenna height above average terrain. Where the 3.2-16.1 kilometers (2-
10 mile) portion of a radial extends in whole or in part over large 
bodies of water (such as ocean areas, gulfs, sounds, bays, large lakes, 
etc., but not rivers) or extends over foreign territory but the contour 
encompasses land area within the United States beyond the 16.1 
kilometers (10 mile) portion of the radial, the entire 3.2-16.1 
kilometers (2-10 mile) portion of the radial shall be included in the 
computation of antenna height above average terrain. However, where the 
contour does not so encompass United States land area and (1) the entire 
3.2-16.1 kilometers (2-10 mile) portion of the radial extends over large 
bodies of water or foreign territory, such radial shall be completely 
omitted from the computation of antenna height above average terrain, 
and (2) where a part of the 3.2-16.1 kilometers (2-10 mile) portion of a 
radial extends over large bodies of water or over foreign territory, 
only that part of the radial extending from the 3.2 kilometer (2 mile) 
sector to the outermost portion of land area within the United States 
covered by the radial shall be employed in the computation of antenna 
height above average terrain. The profile graph for each radial should 
be plotted by contour intervals of from 12.2-30.5 meters (40-100 feet) 
and, where the data permits, at least 50 points of elevation (generally 
uniformly spaced) should be used for each radial. In instances of very 
rugged terrain where the use of contour intervals of 30.5 meters (100 
feet) would result in several points in a short distance, 61.0-122.0 
meter (200-400 foot) contour intervals may be used for such distances. 
On the

[[Page 199]]

other hand, where the terrain is uniform or gently sloping the smallest 
contour interval indicated on the topographic map (see paragraph (b)(5) 
of this section) should be used, although only relatively few points may 
be available. The profile graphs should indicate the topography 
accurately for each radial, and the graphs should be plotted withthe 
distance in kilometers as the abscissa and the elevation in meters above 
mean sea level as the ordinate. The profile graphs should indicate the 
source of the topographical data employed. The graph should also show 
the elevation of the center of the radiating system. The graph may be 
plotted either on rectangular coordinate paper or on special paper which 
shows the curvature of the earth. It is not necessary to take the 
curvature of the earth into consideration in this procedure, as this 
factor is taken care of in the charts showing signal strengths. The 
average elevation of the 12.9 kilometer (8 miles) distance between 3.2-
16.1 kilometers (2-10 miles) from the antenna site should then be 
determined from the profile graph for each radial. This may be obtained 
by averaging a large number of equally spaced points, by using a 
planimeter, or by obtaining the median elevation (that exceeded for 50% 
of the distance) in sectors and averaging those values. In directions 
where the terrain is such that negative antenna heights or heights below 
30.5 meters (100 feet) for the 3.2 to 16.1 kilometers (2 to 10 mile) 
sector are obtained, an assumed height of 30.5 meters (100 feet) shall 
be used for the prediction of coverage. However, where the actual 
contour distances are critical factors, a supplemental showing of 
expected coverage must be included together with a description of the 
method employed in predicting such coverage. In special cases, the 
Commission may require additional information as to terrain and 
coverage.
    (5) In the preparation of the profile graph previously described, 
and in determining the location and height above sea level of the 
antenna site, the elevation or contour intervals shall be taken from the 
United States Geological Survey Topographic Quadrangle Maps, United 
States Army Corps of Engineers' maps or Tennessee Valley Authority maps, 
whichever is the latest, for all areas for which such maps are 
available. If such maps are not published for the area in question, the 
next best topographic information should be used. Topographic data may 
sometimes be obtained from State and Municipal agencies. Data from 
Sectional Aeronautical Charts (including bench marks) or railroad depot 
elevations and highway elevations from road maps may be used where no 
better information is available. In cases where limited topographic data 
is available, use may be made of an altimeter in a car driven along 
roads extending generally radially from the transmitter site. United 
States Geological Survey Topographic Quadrangle Maps may be obtained 
from the United States Geological Survey, Department of the Interior, 
Washington, D.C. 20240. Sectional Aeronautical Charts are available from 
the United States Coast and Geodetic Survey, Department of Commerce, 
Washington, D.C. 20235. In lieu of maps, the average terrain elevation 
may be computer generated, except in the cases of dispute, using 
elevations from a 30 second point or better topographic data file. The 
file must be identified and the data processed for intermediate points 
along each radial using linear interpolation techniques.The height above 
mean sea level of the antenna site must be obtained manually using 
appropriate topographic maps.
    (c) Antenna system. (1) The antenna system shall be designed so that 
the effective radiated power at any angle above the horizontal shall be 
as low as the state of the art permits, and in the same vertical plane 
may not exceed the effective radiated power in either the horizontal 
direction or below the horizontal, whichever is greater.
    (2) An antenna designed or altered to produce a noncircular 
radiation pattern in the horizontal plane is considered to be a 
directional antenna. Antennas purposely installed in such a manner as to 
result in the mechanical beam tilting of the major vertical radiation 
lobe are included in this category.
    (3) Applications proposing the use of directional antenna systems 
must be accompanied by the following:

[[Page 200]]

    (i) Complete description of the proposed antenna system, including 
the manufacturer and model number of the proposed directional antenna.
    (ii) Relative field horizontal plane pattern (horizontal 
polarization only) of the proposed directional antenna. A value of 1.0 
should be used for the maximum radiation. The plot of the pattern should 
be oriented so that 0 degrees corresponds to true North. Where 
mechanical beam tilt is intended, the amount of tilt in degrees of the 
antenna vertical axis and the orientation of the downward tilt with 
respect to true North must be specified, and the horizontal plane 
pattern must reflect the use of mechanical beam tilt.
    (iii) A tabulation of the relative field pattern required in 
paragraph (c)(3)(ii) of this section. The tabulation should use the same 
zero degree reference as the plotted pattern, and be tabulated at least 
every 10 degrees. In addition, tabulated values of all maxima and 
minima, with their corresponding azimuths, should be submitted.
    (iv) Horizontal and vertical plane radiation patterns showing the 
effective radiated power, in dBk, for each direction. Sufficient 
vertical plane patterns must be included to indicate clearly the 
radiation characteristics of the antenna above and below the horizontal 
plane. In cases where the angles at which the maximum vertical radiation 
varies with azimuth, a separate vertical radiation pattern must be 
provided for each pertinent radial direction.
    (v) All horizontal plane patterns must be plotted to the largest 
scale possible on unglazed letter-size polar coordinate paper (main 
engraving approximately 18 cm x 25 cm (7 inches x 10 inches)) using only 
scale divisions and subdivisions of 1, 2, 2.5. or 5 times 10-nth. All 
vertical plane patterns must be plotted on unglazed letter-size 
rectangular coordinate paper. Values of field strength on any pattern 
less than 10 percent of the maximum field strength plotted on that 
pattern must be shown on an enlarged scale.
    (vi) The horizontal and vertical plane patterns that are required 
are the patterns for the complete directional antenna system. In the 
case of a composite antenna composed of two or more individual antennas, 
this means that the patterns for the composite antenna, not the patterns 
for each of the individual antennas, must be submitted.
    (4) Where simultaneous use of antennas or antenna structures is 
proposed, the following provisions shall apply:
    (i) In cases where it is proposed to use a tower of an AM broadcast 
station as a supporting structure for a DTV broadcast antenna, an 
appropriate application for changes in the radiating system of the AM 
broadcast station must be filed by the licensee thereof. A formal 
application (FCC Form 301, or FCC Form 340 for a noncommercial 
educational station) will be required if the proposal involves 
substantial change in the physical height or radiation characteristics 
of the AM broadcast antennas; otherwise an informal application will be 
acceptable. (In case of doubt, an informal application (letter) together 
with complete engineering data should be submitted.) An application may 
be required for other classes of stations when the tower is to be used 
in connection with a DTV station.
    (ii) When the proposed DTV antenna is to be mounted on a tower in 
the vicinity of an AM station directional antenna system and it appears 
that the operation of the directional antenna system may be affected, an 
engineering study must be filed with the DTV application concerning the 
effect of the DTV antenna on the AM directional radiation pattern. Field 
measurements of the AM stations may be required prior to and following 
construction of the DTV station antenna, and readjustments made as 
necessary.
    (5) Applications proposing the use of electrical beam tilt pursuant 
to section 73.622(f)(4) must be accompanied by the following:
    (i) Complete description of the proposed antenna system, including 
the manufacturer and model number. Vertical plane radiation patterns 
conforming with paragraphs (c)(3)(iv), (c)(3)(v) and (c)(3)(vi) of this 
section.
    (ii) For at least 36 evenly spaced radials, including 0 degrees 
corresponding to true North, a determination of the depression angle 
between

[[Page 201]]

the transmitting antenna center of radiation and the radio horizon using 
the formula in paragraph (b)(2) of this section.
    (iii) For each such radial direction, the ERP at the depression 
angle, taking into account the effect of the electrical beam tilt, 
mechanical beam tilt, if used, and directional antenna pattern if a 
directional antenna is specified.
    (iv) The maximum ERP toward the radio horizon determined by this 
process must be clearly indicated. In addition, a tabulation of the 
relative fields representing the effective radiation pattern toward the 
radio horizon in the 36 radial directions must be submitted. A value of 
1.0 should be used for the maximum radiation.

[62 FR 26990, May 16, 1997, as amended at 63 FR 13562, Mar. 20, 1998]



Sec. 73.635  Use of common antenna site.

    No television license or renewal of a television license will be 
granted to any person who owns, leases, or controls a particular site 
which is peculiarly suitable for television broadcasting in a particular 
area and (a) which is not available for use by other television 
licensees; and (b) no other comparable site is available in the area; 
and (c) where the exclusive use of such site by the applicant or 
licensee would unduly limit the number of television stations that can 
be authorized in a particular area or would unduly restrict competition 
among television stations.

[28 FR 13660, Dec. 14, 1963]



Sec. 73.641  Subscription TV definitions.

    (a) Subscription television. A system whereby subscription 
television programs are transmitted and received.
    (b) Subscription television program. A television boadcast program 
intended to be received in intelligible form for a fee or charge.

[52 FR 6154, Mar. 2, 1987]



Sec. 73.642  Subscription TV service.

    (a) Subscription TV service may be provided by:
    (1) Licensees and permittees of commercial TV stations, and
    (2) Licensees and permittees of low power TV stations.
    (b) A licensee or permittee of a commercial TV station or a low 
power TV station may begin subscription TV service upon installation of 
encoding equipment having advance FCC approval. However, the licensee or 
permittee of a TV broadcast station (not applicable to low power TV 
stations) must send a letter to the FCC in Washington, DC, that 
subscription TV service will commence at least 30 days prior to 
commencement of such service. In that letter, to be entitled ``Notice of 
Commencement of STV Operations,'' the licensee or permittee is to state 
that it will comply with the provisions of paragraphs (e)(1) through 
(e)(3) and Sec. 73.644(c) of this chapter and identify the make and type 
of encoding system to be used. A similar notice must be submitted if the 
licensee or permittee commences using another type of encoding system. 
(See section 644(h).) A notice must also be submitted to the FCC in 
Washington, DC, if encoded subscription TV service is to be 
discontinued, at least 30 days prior to such discontinuance.
    (c) The station proof of system compliance measurement data (see 
Sec. 73.644(c)) need not be submitted to the FCC, however, the 
measurement data must be available to the FCC upon request.
    (d) The use of the visual vertical blanking interval or an aural 
subcarrier for transmitting subscriber decoder control code signals 
during periods of normal non-encoded programming may be used only upon 
specific FCC authorization. Letter requests to use either the video 
blanking intervals or aural subcarriers during periods of non-
subscription programming are to be sent to the FCC in Washington, D.C.
    (e) A licensee or permittee of a commercial TV broadcast or low 
power TV station may not transmit a subscription service if it has a 
contract, arrangement, or understanding, expressed or implied, that:
    (1) Prevents or hinders it from rejecting or refusing any 
subscription TV broadcast program that it reasonably believes to be 
unsatisfactory or unsuitable or contrary to the public interests; or 
substituting a subscription or

[[Page 202]]

conventional program that, in its opinion, is of greater local or 
national importance; or
    (2) Delegates to any other person the right to schedule the hours of 
transmission of subscription programs. However, this rule does not 
prevent a licensee or permittee from entering into an agreement or 
arrangement whereby it agrees to schedule a specific subscription TV 
broadcast program at a specific time or to schedule a specific number of 
hours of subscription programs during the broadcast day (or segments 
thereof) or weeks; or
    (3) Deprives it of the right of ultimate decision concerning the 
maximum amount of any subscription program charge or fee.
    (4) Has provisions that do not comply with the following policies of 
the FCC:
    (i) Unless a satifactory signal is unavailable at the location where 
service is desired, subscription TV service must be provided to all 
persons desiring it within the Grade A contour of the station 
broadcasting subscription programs. Geographic or other reasonable 
patterns of installation for new subscription services is permitted and, 
for good cause, service may be terminated.
    (ii) Charges, terms and conditions of service to subscribers must be 
applied uniformly. However, subscribers may be divided into reasonable 
classifications approved by the FCC, and the impositions of different 
sets of terms and conditions may be applied to subscribers in different 
classifications. Further, for good cause, within such classification, 
deposits may be required from some subscribers and not of others; and, 
also for good cause, if a subscription system generally uses a credit-
type decoder, cash operated decoders may be installed for some 
subscribers.

[48 FR 56392, Dec. 21, 1983, as amended at 52 FR 6154, Mar. 2, 1987]



Sec. 73.643  Subscription TV operating requirements.

    The non-technical rules and policies applicable to regular TV 
broadcast stations are applicable to subscription TV operations, except 
where specifically exempted in the provisions of those rules and 
policies.

[48 FR 56392, Dec. 21, 1983]



Sec. 73.644  Subscription TV transmission systems.

    (a) Licensees and permittees of commercial TV broadcast and low 
power TV stations may conduct subscription operations only by using an 
encoding system that has been approved in advance by the FCC. Such 
advance approval may be applied for and granted in accordance with the 
procedures given in Subpart M Part 2 of the Rules.
    (b) The criteria for advance approval of subscription TV 
transmitting systems by the FCC are as follows:
    (1) Spectral energy in the transmitted signal must not exceed the 
limitations given in Sec. 73.687(e).
    (2) No increase in width of the television broadcast channel (6 
MHz.) is permitted.
    (3) The technical system must enable stations to transmit encoded 
subscription TV programs without increasing the RMS output power from 
either the video or audio transmitters over that required to transmit 
the same program material using normal transmission standards.
    (4) Modification of a type accepted TV broadcast or low power TV 
transmitter for encoded transmissions must not render transmitter 
incapable of operating in accordance with the operating specifications 
upon which type acceptance was granted. (See Sec. 2.1001 (b), (k))
    (5) Interference to reception of conventional television either of 
co-channel or adjacent channel stations must not increase over that 
resulting from the transmission of programming with normal transmission 
standards.
    (6) Subscriber decoder devices must meet the provisions, where 
required, of Subpart H of Part 15 of the FCC Rules for TV Interface 
Devices.
    (c) Prior to commencing the transmission of encoded subscription 
programming, the licensee or permittee of a TV broadcast or low power TV 
station must perform such tests and measurements to determine that the 
transmitted encoded signal conforms to the

[[Page 203]]

radiated radio frequency and demodulated baseband and waveforms, 
transmitter operating power determination, and the occupied bandwidth 
limitations specified in the application for advance FCC approval of the 
system being used. A copy of the measurement data is to be maintained in 
the station files and made available to the FCC upon request.
    (d) The licensee of a station transmitting an encoded subscription 
service must have at the transmitter control point the technical 
specifications for the system being used of both the aural and visual 
baseband signals and the transmitted radiofrequency signals, and have 
the necessary measuring and monitoring equipment, including transmitter 
output power measuring equipment, to determine that the transmissions 
conform to the advance approval specifications on file with the FCC. 
Full operating specifications for the system must be available to 
representatives of the FCC upon request.
    (e) The operating power of the transmitters during encoded 
operations must be determined and maintained according to the procedures 
given in the application for advance approval.
    (f) A station using an encoding system in accordance with the 
specifications filed with the application for advance approval is deemed 
to be exempted from those technical regulations of this Subpart and 
Subpart H to the extent they are specifically detailed in the 
application.
    (g) No protection from interference of any kind will be afforded to 
reception of encoded subscription programming over that afforded 
reception of non-encoded signals.
    (h) A licensee or permittee may make no modifications on a 
subscription encoding system that would alter the characteristics of the 
transmitted aural or visual signal from those specified in the 
application for advance approval. A licensee or permittee of a station 
replacing its encoding system must perform the measurements required by 
paragraph (c) of this section. A TV broadcast station licensee or 
permittee must also send a letter advising the FCC of the new system 
being used as required by Sec. 73.642(b) of this chapter.
    (i) The station licensee is fully responsible for all technical 
operations of the station during transmissions of encoded subscription 
programming, regardless of the supplier of the encoding equipment or 
subscription program service.

    Note: Stations transmitting encoded subscription programming prior 
to October 1, 1983, must comply with all technical and operating 
requirements of this Section no later than April 1, 1984. Stations not 
having the information to comply with this Section must obtain such 
information from the manufacturer of the encoding system being used, and 
if necessary, by measurements of the station's transmission system.

    (j) Upon request by an authorized representative of the FCC, the 
licensee of a TV station transmitting encoded programming must make 
available a receiving decoder to the Commission to carry out its 
regulatory responsibilities.

[48 FR 56392, Dec. 21, 1983, as amended at 57 FR 48333, Oct. 23, 1992]



Sec. 73.646  Telecommunications Service on the Vertical Blanking Interval and in the Visual Signal.

    (a) Telecommunications services permitted on the vertical blanking 
interval (VBI) and in the visual signal include the transmission of 
data, processed information, or any other communication in either a 
digital or analog mode.
    (b) Telecommunications service on the VBI and in the visual signal 
is of an ancillary nature and as such is an elective, subsidiary 
activity. No service guidelines, limitations, or performance standards 
are applied to it. The kinds of service that may be provided include, 
but are not limited to, teletext, paging, computer software and bulk 
data distribution, and aural messages. Such services may be provided on 
a broadcast, point-to-point, or point to multipoint basis.
    (c) Telecommunications services that are common carrier in nature 
are subject to common carrier regulation. Licensees operating such 
services are required to apply to the Commission for the appropriate 
authorization and to comply with all policies and rules applicable to 
the particular service.

[[Page 204]]

    (d) Television licensees are authorized to lease their VBI and 
visual signal telecommunications facilities to outside parties. In all 
arrangements entered into with outside parties affecting 
telecommunications service operation, the licensee or permittee must 
retain control over all material transmitted in a broadcast mode via the 
station's facilities, with the right to reject any material that it 
deems inappropriate or undesirable. The licensee or permittee is also 
responsible for all aspects of technical operation involving such 
telecommunications services.
    (e) The grant or renewal of a TV station license or permit will not 
be furthered or promoted by proposed or past VBI or visual signal 
telecommunications service operation; the licensee must establish that 
its broadcast operation serves the public interest wholly apart from 
such telecommunications service activities. (Violation of rules 
applicable to VBI and visual signal telecommunications services could, 
of course, reflect on a licensee's qualifications to hold its license or 
permit.)
    (f) TV broadcast stations are authorized to transmit VBI and visual 
telecommunications service signals during any time period, including 
portions of the day when normal programming is not broadcast. Such 
transmissions must be in accordance with the technical provisions of 
Sec. 73.682.

[50 FR 4663, Feb. 1, 1985, as amended at 50 FR 9035, Mar. 6, 1985; 61 FR 
36304, July 10, 1996]



Sec. 73.653  Operation of TV aural and visual transmitters.

    The aural and visual transmitters may be operated independently of 
each other or, if operated simultaneously, may be used with different 
and unrelated program material.

[54 FR 9806, Mar. 8, 1989]



Sec. 73.658  Affiliation agreements and network program practices; territorial exclusivity in non-network program arrangements.

    (a) Exclusive affiliation of station. No license shall be granted to 
a television broadcast station having any contract, arrangement, or 
understanding, express or implied, with a network organization under 
which the station is prevented or hindered from, or penalized for, 
broadcasting the programs of any other network organization. (The term 
``network organization'' as used in this section includes national and 
regional network organizations. See ch. VII, J, of Report on Chain 
Broadcasting.)
    (b) Territorial exclusively. No license shall be granted to a 
television broadcast station having any contract, arrangement, or 
understanding, express or implied, with a network organization which 
prevents or hinders another broadcast station located in the same 
community from broadcasting the network's programs not taken by the 
former station, or which prevents or hinders another broadcast station 
located in a different community from broadcasting any program of the 
network organization. This section shall not be construed to prohibit 
any contract, arrangement, or understanding between a station and a 
network organization pursuant to which the station is granted the first 
call in its community upon the programs of the network organization. As 
employed in this paragraph, the term ``community'' is defined as the 
community specified in the instrument of authorization as the location 
of the station.
    (c)  [Reserved]
    (d) Station commitment of broadcast time. No license shall be 
granted to a television broadcast station having any contract, 
arrangement, or understanding, express or implied, with any network 
organization, which provides for optioning of the station's time to the 
network organization, or which has the same restraining effect as time 
optioning. As used in this section, time optioning is any contract, 
arrangement, or understanding, express or implied, between a station and 
a network organization which prevents or hinders the station from 
scheduling programs before the network agrees to utilize the time during 
which such programs are scheduled, or which requires the station to 
clear time already scheduled when the network organization seeks to 
utilize the time.
    (e) Right to reject programs. No license shall be granted to a 
television broadcast station having any contract, arrangement, or 
understanding, express or implied, with a network organization which, 
with respect to programs

[[Page 205]]

offered or already contracted for pursuant to an affiliation contract, 
prevents or hinders the station from:
    (1) Rejecting or refusing network programs which the station 
reasonably believes to be unsatisfactory or unsuitable or contrary to 
the public interest, or
    (2) Substituting a program which, in the station's opinion, is of 
greater local or national importance.
    (f)  [Reserved]
    (g) Dual network operation. A television broadcast station may 
affiliate with a person or entity that maintains two or more networks of 
television broadcast stations unless such dual or multiple networks are 
composed of:
    (1) Two or more persons or entities that, on February 8, 1996, were 
``networks.'' For the purposes of this paragraph, the term network means 
any person, entity, or corporation which offers an interconnected 
program service on a regular basis for 15 or more hours per week to at 
least 25 affiliated television licensees in 10 or more states; and/or 
any person, entity, or corporation controlling, controlled by, or under 
common control with such person, entity, or corporation; or
    (2) Any network described in paragraph (g)(1) of this section and an 
English-language program distribution service that, on February 8, 1996, 
provided four or more hours of programming per week on a national basis 
pursuant to network affiliation arrangements with local television 
broadcast stations in markets reaching more than 75 percent of 
television homes (as measured by a national ratings service).
    (h) Control by networks of station rates. No license shall be 
granted to a television broadcast station having any contract, 
arrangement, or understanding, express or implied, with a network 
organization under which the station is prevented or hindered from, or 
penalized for, fixing or altering its rates for the sale of broadcast 
time for other than the network's programs.
    (i) No license shall be granted to a television broadcast station 
which is represented for the sale of non-network time by a network 
organization or by an organization directly or indirectly controlled by 
or under common control with a network organization, if the station has 
any contract, arrangement or understanding, express or implied, which 
provides for the affiliation of the station with such network 
organization: Provided, however, That this rule shall not be applicable 
to stations licensed to a network organization or to a subsidiary of a 
network organization.
    (j)--(l)  [Reserved]
    (m) Territorial exclusivity in non-network arrangements. (1) No 
television station shall enter into any contract, arrangement, or 
understanding, expressed or implied; with a non-network program 
producer, distributor, or supplier, or other person; which prevents or 
hinders another television station located in a community over 56.3 
kilometers (35 miles) away, as determined by the reference points 
contained in Sec. 76.53 of this chapter, (if reference points for a 
community are not listed in Sec. 76.53, the location of the main post 
office will be used) from broadcasting any program purchased by the 
former station from such non-network program producer, distributor, 
supplier, or other person, except that a television station may secure 
exclusivity against a television station licensed to another designated 
community in a hyphenated market specified in the market listing as 
contained in Sec. 76.51 of this chapter for those 100 markets listed, 
and for markets not listed in Sec. 76.51 of this chapter, the listing as 
contained in the ARB Television Market Analysisfor the most recent year 
at the time that the exclusivity contract, arrangement or understanding 
is complete under practices of the industry. As used in this paragraph, 
the term ``community'' is defined as the community specified in the 
instrument of authorization as the location of the station.
    (2) Notwithstanding paragraph (m)(1) of this section, a television 
station may enter into a contract, arrangement, or understanding with a 
producer, supplier, or distributor of a non-network program if that 
contract, arrangement, or understanding provides that the broadcast 
station has exclusive national rights such that no other television 
station in the United States may broadcast the program.


[[Page 206]]


    Note 1: Contracts, arrangements, or understandings that are complete 
under the practices of the industry prior to August 7, 1973, will not be 
disturbed. Extensions or renewals of such agreements are not permitted 
because they would in effect be new agreements without competitive 
bidding. However, such agreements that were based on the broadcaster's 
advancing ``seed money'' for the production of a specific program or 
series that specify two time periods--a tryout period and period 
thereafter for general exhibition--may be extended or renewed as 
contemplated in the basic agreement.

    Note 2: It is intended that the top 100 major television markets 
listed in Sec. 76.51 of this chapter shall be used for the purposes of 
this rule and that the listing of the top 100 television markets 
appearing in the ARB Television Market Analysis shall not be used. The 
reference in this rule to the listing of markets in the ARB Television 
Market Analysis refers to hyphenated markets below the top-100 markets 
contained in the ARB Television Market Analysis. If a community is 
listed in a hyphenated market in Sec. 76.51 and is also listed in one of 
the markets in the ARB listing, the listing in Sec. 76.51 shall govern.

    Note 3: The provisions of this paragraph apply only to U.S. 
commercial television broadcast stations in the 50 states, and not to 
stations in Puerto Rico or the Virgin Islands, foreign stations or 
noncommercial educational television or ``public'' television stations 
(either by way of restrictions on their exclusivity or on exclusivity 
against them).

    Note 4: New stations authorized in any community of a hyphenated 
market listed in Sec. 76.51 of this chapter or in any community of a 
hyphenated market listed in the ARB Television Market Analysis (for 
markets below the top-100 markets) are subject to the same rules as 
previously existing stations therein. New stations authorized in other 
communities are considered stations in separate markets unless and until 
Sec. 76.51 is amended by Commission action, or the ARB listing is 
changed.


(Sec. 5, 48 Stat. 1068 (47 U.S.C. 155))

[28 FR 13660, Dec. 14, 1963]

    Editorial Note: For Federal Register citations affecting 
Sec. 73.658, see the List of CFR Sections Affected in the Finding Aids 
section of this volume.



Secs. 73.659--73.663  [Reserved]



Sec. 73.664  Determining operating power.

    (a) The operating power of each TV visual transmitter shall normally 
be determined by the direct method.
    (b) Direct method, visual transmitter. The direct method of power 
determination for a TV visual transmitter uses the indications of a 
calibrated transmission line meter (responsive to peak power) located at 
the RF output terminals of the transmitter. The indications of the 
calibrated meter are used to observe and maintain the authorized 
operating power of the visual transmitter. This meter must be calibrated 
whenever any component in the metering circuit is repaired or replaced 
and as often as necessary to ensure operation in accordance with the 
provisions of Sec. 73.1560 of this part. The following calibration 
procedures are to be used:
    (1) The transmission line meter is calibrated by measuring the 
average power at the output terminals of the transmitter, including any 
vestigial sideband and harmonic filters which may be used in normal 
operation. For this determination the average power output is measured 
while operating into a dummy load of substantially zero reactance and a 
resistance equal to the transmission line characteristic impedance. 
During this measurement the transmitter is to be modulated only by a 
standard synchronizing signal with blanking level set at 75% of peak 
amplitude as observed in an output waveform monitor, and with this 
blanketing level amplitude maintained throughout the time interval 
between synchronizing pulses.
    (2) If electrical devices are used to determine the output power, 
such devices must permit determination of this power to within an 
accuracy of 5% of the power indicated by the full scale 
reading of the electrical indicating instrument of the device. If 
temperature and coolant flow indicating devices are used to determine 
the power output, such devices must permit determination of this power 
to within an accuracy of 4% of measured average power 
output. The peak power output is the power so measured in the dummy load 
multiplied by the factor 1.68. During this measurement the input voltage 
and current to the final radio frequency amplifier stage and the 
transmission line meter are to be read and compared with similar 
readings taken with the dummy load replaced

[[Page 207]]

by the antenna. These readings must be in substantial agreement.
    (3) The meter must be calibrated with the transmitter operating at 
80%, 100%, and 110% of the authorized power as often as may be necessary 
to maintain its accuracy and ensure correct transmitter operating power. 
In cases where the transmitter is incapable of operating at 110% of the 
authorized power output, the calibration may be made at a power output 
between 100% and 110% of the authorized power output. However, where 
this is done, the output meter must be marked at the point of 
calibration of maximum power output, and the station will be deemed to 
be in violation of this rule if that power is exceeded. The upper and 
lower limits of permissible power deviation as determined by the 
prescribed calibration, must be shown upon the meter either by means of 
adjustable red markers incorporated in the meter or by red marks placed 
upon the meter scale or glass face. These markings must be checked and 
changed, if necessary, each time the meter is calibrated.
    (c) Indirect method, visual transmitter. The operating power is 
determined by the indirect method by applying an appropriate factor to 
the input power to the final radio-frequency amplifier stage of the 
transmitter using the following formula:

    Transmitter output power=Ep x Ip x F

    Where:

Ep=DC input voltage of the final radio-frequency amplifier stage.
Ip=DC input current of the final radio-frequency amplifier stage.
F=Efficiency factor.

    (1) If the above formula is not appropriate for the design of the 
transmitter final amplifier, use a formula specified by the transmitter 
manufacturer with other appropriate operating parameters.
    (2) The value of the efficiency factor, F established for the 
authorized transmitter output power is to be used for maintaining the 
operating power, even though there may be some variation in F over the 
power operating range of the transmitter.
    (3) The value of F is to be determined and a record kept thereof by 
one of the following procedures listed in order of preference:
    (i) Using the most recent measurement data for calibration of the 
transmission line meter according to the procedures described in 
paragraph (b) of this section or the most recent measurements made by 
the licensee establishing the value of F. In the case of composite 
transmitters or those in which the final amplifier stages have been 
modified pursuant to FCC approval, the licensee must furnish the FCC and 
also retain with the station records the measurement data used as a 
basis for determining the value of F.
    (ii) Using measurement data shown on the transmitter manufacturer's 
test data supplied to the licensee, provided that measurements were made 
at the authorized carrier frequency and transmitter output power.
    (iii) Using the transmitter manufacturer's measurement data 
submitted to the FCC for type acceptance as shown in the instruction 
book supplied to the licensee.

    Note: Refer to Sec. 73.1560 for aural transmitter output power 
levels.


[44 FR 58732, Oct. 11, 1979, as amended at 48 FR 44805, Sept. 30, 1983; 
49 FR 4210, Feb. 3, 1984; 49 FR 22092, May 25, 1984; 49 FR 49851, Dec. 
24, 1984; 50 FR 26568, June 27, 1985; 54 FR 9806, Mar. 8, 1989. 
Redesignated at 58 FR 62555, Nov. 29, 1993]



Sec. 73.665  Use of TV aural baseband subcarriers.

    Licensees of TV broadcast stations may transmit, without further 
authorization from the FCC, subcarriers and signals within the composite 
baseband for the following purposes:
    (a) Stereophonic (biphonic, quadraphonic, etc.) sound programs under 
the provisions of Secs. 73.667 and 73.669.
    (b) Transmission of signals relating to the operation of TV 
stations, such as relaying broadcast materials to other stations, remote 
cueing and order messages, and control and telemetry signals for the 
transmitting system.
    (c) Transmission of pilot or control signals to enhance the 
station's program service such as (but not restricted to) activation of 
noise reduction decoders in receivers, for any other receiver control 
purpose, or for

[[Page 208]]

program alerting and program identification.
    (d) Subsidiary communications services.

[49 FR 18105, Apr. 27, 1984]



Sec. 73.667  TV subsidiary communications services.

    (a) Subsidiary communications services are those transmitted within 
the TV aural baseband signal, but do not include services which enhance 
the main program broadcast service or exclusively relate to station 
operations (see Sec. 73.665(a), (b), and (c)). Subsidiary communications 
include, but are not limited to, services such as functional music, 
specialized foreign language programs, radio reading services, utility 
load management, market and financial data and news, paging and calling, 
traffic control signal switching, and point-to-point or multipoint 
messages.
    (b) TV subsidiary communications services that are common carrier or 
private radio in nature are subject to common carrier or private radio 
regulation. Licensees operating such services are required to apply to 
the FCC for the appropriate authorization and to comply with all 
policies and rules applicable to the service. Responsibility for making 
the initial determinations of whether a particular activity requires 
separate authority rests with the TV station licensee or permittee. 
Initial determinations by licensees or permittees are subject to FCC 
examination and may be reviewed at the FCC's discretion.
    (c) Subsidiary communications services are of a secondary nature 
under the authority of the TV station authorization, and the authority 
to provide such communications services may not be retained or 
transferred in any manner separate from the station's authorization. The 
grant or renewal of a TV station permit or license is not furthered or 
promoted by proposed or past subsidiary communications services. The 
permittee or licensee must establish that the broadcast operation is in 
the public interest wholly apart from the subsidiary communications 
services provided.
    (d) The station identification, delayed recording, and sponsor 
identification announcement required by Secs. 73.1201, 73.1208, and 
73.1212 are not applicable to leased communications services transmitted 
via services that are not of a general broadcast nature.
    (e) The licensee or permittee must retain control over all material 
transmitted in a broadcast mode via the station's facilities, with the 
right to reject any material that it deems inappropriate or undesirable.

[49 FR 18105, Apr. 27, 1984, as amended at 49 FR 27147, July 2, 1984; 56 
FR 49707, Oct. 1, 1991]



Sec. 73.669  TV stereophonic aural and multiplex subcarrier operation.

    (a) A TV broadcast station may without specific authority from the 
FCC, transmit multichannel aural programs upon installation of 
multichannel sound equipment. Prior to commencement of multichannel 
broadcasting, the equipment shall be measured in accordance with 
Sec. 73.1690(e).
    (b) Multiplex subcarriers may be used by a TV station pursuant to 
the provisions of Sec. 73.665 and may be transmitted on a secondary, 
non-interference basis to broadcast programming without specific 
authority from the FCC. Transmissions must be conducted in accordance 
with the technical standards given in Sec. 73.682(c).
    (c) In all arrangements entered into with outside parties affecting 
non-common carrier subcarrier operation, the licensee or permittee must 
retain control over all material transmitted over the station's 
facilities, with the right to reject any material which is deemed 
inappropriate or undesirable. Subchannel leasing arrangements must be 
kept in writing at the station and made available to the FCC upon 
request.

[49 FR 18106, Apr. 27, 1984]



Sec. 73.670  Commercial limits in children's programs.

    No commercial television broadcast station licensee shall air more 
than 10.5 minutes of commercial matter per hour during children's 
programming on weekends, or more than 12 minutes of commercial matter 
per hour on weekdays.


[[Page 209]]


    Note 1: Commerical matter means air time sold for purposes of 
selling a product or service.
    Note 2: For purposes of this section, children's programming refers 
to programs originally produced and broadcast primarily for an audience 
of children 12 years old and younger.


[56 FR 19616, Apr. 29, 1991; 56 FR 28825, June 25, 1991]



Sec. 73.671  Educational and informational programming for children.

    (a) Each commercial and noncommercial educational television 
broadcast station licensee has an obligation to serve, over the term of 
its license, the educational and informational needs of children through 
both the licensee's overall programming and programming specifically 
designed to serve such needs.
    (b) Any special nonbroadcast efforts which enhance the value of 
children's educational and informational television programming, and any 
special effort to produce or support educational and informational 
television programming by another station in the licensee's marketplace, 
may also contribute to meeting the licensee's obligation to serve, over 
the term of its license, the educational and informational needs of 
children.
    (c) For purposes of this section, educational and informational 
television programming is any television programming that furthers the 
educational and informational needs of children 16 years of age and 
under in any respect, including the child's intellectual/cognitive or 
social/emotional needs. Programming specifically designed to serve the 
educational and informational needs of children (``Core Programming'') 
is educational and informational programming that satisfies the 
following additional criteria:
    (1) It has serving the educational and informational needs of 
children ages 16 and under as a significant purpose;
    (2) It is aired between the hours of 7:00 a.m. and 10:00 p.m.;
    (3) It is a regularly scheduled weekly program;
    (4) It is at least 30 minutes in length;
    (5) The educational and informational objective and the target child 
audience are specified in writing in the licensee's Children's 
Television Programming Report, as described in Sec. 73.3526(a)(8)(iii); 
and
    (6) Instructions for listing the program as educational/
informational, including an indication of the age group for which the 
program is intended, are provided by the licensee to publishers of 
program guides, as described in Sec. 73.673(b).

    Note 1 to Sec. 73.671: For purposes of determining under this 
section whether programming has a significant purpose of serving the 
educational and informational needs of children, the Commission will 
ordinarily rely on the good faith judgments of the licensee. Commission 
review of compliance with that element of the definition will be done 
only as a last resort.
    Note 2 to Sec. 73.671: The Commission will use the following 
processing guideline in assessing whether a television broadcast 
licensee has complied with the Children's Television Act of 1990 
(``CTA''). A licensee that has aired at least three hours per week of 
Core Programming (as defined in paragraph (c) of this section and as 
averaged over a six month period) will be deemed to have satisfied its 
obligation to air such programming and shall have the CTA portion of its 
license renewal application approved by the Commission staff. A licensee 
will also be deemed to have satisfied this obligation and be eligible 
for such staff approval if the licensee demonstrates that it has aired a 
package of different types of educational and informational programming 
that, while containing somewhat less than three hours per week of Core 
Programming, demonstrates a level of commitment to educating and 
informing children that is at least equivalent to airing three hours per 
week of Core Programming. In this regard, specials, PSAs, short-form 
programs, and regularly scheduled non-weekly programs with a significant 
purpose of educating and informing children can count toward the three 
hour per week processing guideline. Licensees that do not meet these 
processing guidelines will be referred to the Commission, where they 
will have full opportunity to demonstrate compliance with the CTA (e.g., 
by relying in part on sponsorship of core educational/informational 
programs on other stations in the market that increases the amount of 
core educational and informational programming on the station airing the 
sponsored program and/or on special nonbroadcast efforts which enhance 
the value of children's educational and informational television 
programming).


[56 FR 19616, Apr. 29, 1991. Redesignated at 56 FR 28825, June 25, 1991, 
as amended at 61 FR 43997, Aug. 27, 1996]

[[Page 210]]



Sec. 73.672  [Reserved]



Sec. 73.673  Public information initiatives regarding educational and informational programming for children.

    (a) Each commercial television broadcast licensee shall identify 
programs specifically designed to educate and inform children at the 
beginning of the program, in a form that is in the discretion of the 
licensee.
    (b) Each commercial television broadcast station licensee shall 
provide information identifying programming specifically designed to 
educate and inform children to publishers of program guides. Such 
information shall include an indication of the age group for which the 
program is intended.

[61 FR 43998, Aug. 27, 1996]

    Effective Date Note: At 61 FR 43998, Aug. 27, 1996, Sec. 73.673 was 
added, effective either Jan. 2, 1997 or after approval has been given by 
the Office of Management and Budget, whichever comes later.



Sec. 73.681  Definitions.

    Amplitude modulation (AM). A system of modulation in which the 
envelope of the transmitted wave contains a component similar to the 
wave form of the signal to be transmitted.
    Antenna electrical beam tilt. The shaping of the radiation pattern 
in the vertical plane of a transmitting antenna by electrical means so 
that maximum radiation occurs at an angle below the horizontal plane.
    Antenna height above average terrain. The average of the antenna 
heights above the terrain from approximately 3.2 (2 miles) to 16.1 
kilometers (10 miles) from the antenna for the eight directions spaced 
evenly for each 45 degrees of azimuth starting with True North. (In 
general, a different antenna height will be determined in each direction 
from the antenna. The average of these various heights is considered the 
antenna height above the average terrain. In some cases less than 8 
directions may be used. See Sec. 73.684(d)). Where circular or 
elliptical polarization is employed, the antenna height above average 
terrain shall be based upon the height of the radiation center of the 
antenna which transmits the horizontal component of radiation.
    Antenna mechanical beam tilt. The intentional installation of a 
transmitting antenna so that its axis is not vertical, in order to 
change the normal angle of maximum radiation in the vertical plane.
    Antenna power gain. The square of the ratio of the root-mean-square 
free space field strength produced at 1 kilometer in the horizontal 
plane, in millivolts per meter for one kW antenna input power to 221.4 
mV/m. This ratio should be expressed in decibels (dB). (If specified for 
a particular direction, antenna power gain is based on the field 
strength in that direction only.)
    Aspect ratio. The ratio of picture width to picture height as 
transmitted.
    Aural center frequency. (1) The average frequency of the emitted 
wave when modulated by a sinusoidal signal; (2) the frequency of the 
emitted wave without modulation.
    Aural transmitter. The radio equipment for the transmission of the 
aural signal only.
    Auxiliary facility. An auxiliary facility is an antenna separate a 
from the main facility's antenna, permanently installed on the same 
tower or at a different location, from which a station may broadcast for 
short periods without prior Commission authorization or notice to the 
Commission while the main facility is not in operation (e.g., where 
tower work necessitates turning off the main antenna or where lightning 
has caused damage to the main antenna or transmission system) (See 
Sec. 73.1675).
    BTSC. Broadcast Television systems committee recommendation for 
multichannel television sound transmission and audio processing as 
defined in FCC Bulletin OET 60.
    Baseband. Aural transmitter input signals between 0 and 120 kHz.
    Blanking level. The level of the signal during the blanking 
interval, except the interval during the scanning synchronizing pulse 
and the chrominance subcarrier synchronizing burst.
    Chrominance. The colorimetric difference between any color and a 
reference color of equal luminance, the reference color having a 
specific chromaticity.

[[Page 211]]

    Chrominance subcarrier. The carrier which is modulated by the 
chrominance information.
    Color transmission. The transmission of color television signals 
which can be reproduced with different values of hue, saturation, and 
luminance.
    Effective radiated power. The product of the antenna input power and 
the antenna power gain. This product should be expressed in kW and in dB 
above 1 kW (dBk). (If specified for a particular direction, effective 
radiated power is based on the antenna power gain in that direction 
only. The licensed effective radiated power is based on the maximum 
antenna power gain. When a station is authorized to use a directional 
antenna or an antenna beam tilt, the direction of the maximum effective 
radiated power will be specified.) Where circular or elliptical 
polarization is employed, the term effective radiated power is applied 
separately to the horizontally and vertically polarized components of 
radiation. For assignment purposes, only the effective radiated power 
authorized for the horizontally polarized component will be considered.
    Equivalent isotropically radiated power (EIRP). The term 
``equivalent isotropically radiated power'' (also known as ``effective 
radiated power above isotropic'') means the product of the antenna input 
power and the antenna gain in a given direction relative to an isotropic 
antenna.
    Field. Scanning through the picture area once in the chosen scanning 
pattern. In the line interlaced scanning pattern of two to one, the 
scanning of the alternate lines of the picture area once.
    Frame. Scanning all of the picture area once. In the line interlaced 
scanning pattern of two to one, a frame consists of two fields.
    Free space field strength. The field strength that would exist at a 
point in the absence of waves reflected from the earth or other 
reflecting objects.
    Frequency departure. The amount of variation of a carrier frequency 
or center frequency from its assigned value.
    Frequency deviation. The peak difference between the instantaneous 
frequency of the modulated wave and the carrier frequency.
    Frequency modulation (FM). A system of modulation where the 
instantaneous radio frequency varies in proportion to the instantaneous 
amplitude of the modulating signal (amplitude of modulating signal to be 
measured after pre-emphasis, if used) and the instantaneous radio 
frequency is independent of the frequency of the modulating signal.
    Frequency swing. The peak difference between the maximum and the 
minimum values of the instantaneous frequency of the carrier wave during 
modulation.
    Interlaced scanning. A scanning process in which successively 
scanned lines are spaced an integral number of line widths, and in which 
the adjacent lines are scanned during successive cycles of the field 
frequency.
    IRE standard scale. A linear scale for measuring, in IRE units, the 
relative amplitudes of the components of a television signal from a zero 
reference at blanking level, with picture information falling in the 
positive, and synchronizing information in the negative domain.

    Note: When a carrier is amplitude modulated by a television signal 
in accordance with Sec. 73.682, the relationship of the IRE standard 
scale to the conventional measure of modulation is as follows:


------------------------------------------------------------------------
                                                      IRE
                                                   standard   Modulation
                      Level                          scale    percentage
                                                    (units)
------------------------------------------------------------------------
Zero carrier....................................         120           0
Reference white.................................         100        12.5
Blanking........................................           0          75
Synchronizing peaks (maximum carrier level).....         -40         100
------------------------------------------------------------------------

    Luminance. Luminous flux emitted, reflected, or transmitted per unit 
solid angle per unit projected area of the source.
    Main channel. The band of frequencies from 50 to 15,000 Hertz which 
frequency modulate the main aural carrier.
    Monochrome transmission. The transmission of television signals 
which can be reproduced in gradations of a single color only.
    Multichannel Television Sound (MTS). Any system of aural 
transmission that

[[Page 212]]

utilizes aural baseband operation between 15 kHz and 120 kHz to convey 
information or that encodes digital information in the video portion of 
the television signal that is intended to be decoded as audio 
information.
    Multiplex Transmission (Aural). A subchannel added to the regular 
aural carrier of a television broadcast station by means of frequency 
modulated subcarriers.
    Negative transmission. Where a decrease in initial light intensity 
causes an increase in the transmitted power.
    Peak power. The power over a radio frequency cycle corresponding in 
amplitude to synchronizing peaks.
    Percentage modulation. As applied to frequency modulation, the ratio 
of the actual frequency deviation to the frequency deviation defined as 
100% modulation expressed in percentage. For the aural transmitter of TV 
broadcast stations, a frequency deviation of plus-minus25 kHz 
is defined as 100% modulation.
    Pilot subcarrier. A subcarrier used in the reception of TV 
stereophonic aural or other subchannel broadcasts.
    Polarization. The direction of the electric field as radiated from 
the transmitting antenna.
    Program related data signal. A signal, consisting of a series of 
pulses representing data, which is transmitted simultaneously with and 
directly related to the accompanying television program.
    Reference black level. The level corresponding to the specified 
maximum excursion of the luminance signal in the black direction.
    Reference white level of the luminance signal. The level 
corresponding to the specified maximum excursion of the luminance signal 
in the white direction.
    Scanning. The process of analyzing successively, according to a 
predetermined method, the light values of picture elements constituting 
the total picture area.
    Scanning line. A single continuous narrow strip of the picture area 
containing highlights, shadows, and half-tones, determined by the 
process of scanning.
    Standard television signal. A signal which conforms to the 
television transmission standards.
    Synchronization. The maintenance of one operation in step with 
another.
    Television broadcast band. The frequencies in the band extending 
from 54 to 806 megahertz which are assignable to television broadcast 
stations. These frequencies are 54 to 72 megahertz (channels 2 through 
4), 76 to 88 megahertz (channels 5 and 6), 174 to 216 megahertz 
(channels 7 through 13), and 470 to 806 megahertz (channels 14 through 
69).
    Television broadcast station. A station in the television broadcast 
band transmitting simultaneous visual and aural signals intended to be 
received by the general public.
    Television channel. A band of frequencies 6 MHz wide in the 
television broadcast band and designated either by number or by the 
extreme lower and upper frequencies.
    Television transmission standards. The standards which determine the 
characteristics of a television signal as radiated by a television 
broadcast station.
    Television transmitter. The radio transmitter or transmitters for 
the transmission of both visual and aural signals.
    Vestigial sideband transmission. A system of transmission wherein 
one of the generated sidebands is partially attenuated at the 
transmitter and radiated only in part.
    Visual carrier frequency. The frequency of the carrier which is 
modulated by the picture information.
    Visual transmitter. The radio equipment for the transmission of the 
visual signal only.
    Visual transmitter power. The peak power output when transmitting a 
standard television signal.

[28 FR 13660, Dec. 14, 1963, as amended at 35 FR 5692, Apr. 8, 1970; 36 
FR 5505, Mar. 24, 1971; 36 FR 17429, Aug. 31, 1971; 41 FR 56325, Dec. 
28, 1976; 42 FR 20823, Apr. 22, 1977; 44 FR 36039, June 20, 1979; 47 FR 
35990, Aug. 18, 1982; 49 FR 18106, Apr. 27, 1984; 49 FR 38131, Sept. 27, 
1984; 49 FR 50048, Dec. 26, 1984; 50 FR 23699, June 5, 1985; 51 FR 
12616, Apr. 14, 1986; 56 FR 49707, Oct. 1, 1991; 58 FR 44951, Aug. 25, 
1993; 62 FR 51059, Sept. 30, 1997]



Sec. 73.682  TV transmission standards.

    (a) Transmission standards. (1) The width of the television 
broadcast channel shall be 6 MHz.

[[Page 213]]

    (2) The visual carrier frequency shall be nominally 1.25 MHz above 
the lower boundary of the channel.
    (3) The aural center frequency shall be 4.5 MHz higher than the 
visual carrier frequency.
    (4) The visual transmission amplitude characteristic shall be in 
accordance with the chart designated as Figure 5 of Sec. 73.699: 
Provided, however, That for stations operating on Channel 15 through 69 
and employing a transmitter with maximum peak visual power output of 1 
kW or less the visual transmission amplitude characteristic may be in 
accordance with the chart designated as Figure 5a of Sec. 73.699.
    (5) The chrominance subcarrier frequency is 63/88 times precisely 5 
MHz (3.57954545 . . . MHz). The tolerance is plus-minus 10 Hz 
and the rate of frequency drift must not exceed 0.1 Hz per second 
(cycles per second squared).
    (6) For monochrome and color transmissions the number of scanning 
lines per frame shall be 525, interlaced two to one in successive 
fields. The horizontal scanning frequency shall be 2/455 times the 
chrominance subcarrier frequency; this corresponds nominally to 15,750 
Hz with an actual value of 15,734.264 plus-minus0.044 Hz). 
The vertical scanning frequency is 2/525 times the horizontal scanning 
frequency; this corresponds nominally to 60 Hz (the actual value is 
59.94 Hz). For monochrome transmissions only, the nominal values of line 
and field frequencies may be used.
    (7) The aspect ratio of the transmitted television picture shall be 
4 units horizontally to 3 units vertically.
    (8) During active scanning intervals, the scene shall be scanned 
from left to right horizontally and from top to bottom vertically, at 
uniform velocities.
    (9) A carrier shall be modulated within a single television channel 
for both picture and synchronizing signals. The two signals comprise 
different modulation ranges in amplitude in accordance with the 
following:
    (i) Monochrome transmissions shall comply with synchronizing 
waveform specifications in Figure 7 of Sec. 73.699.
    (ii) Color transmissions shall comply with the synchronizing 
waveform specifications in Figure 6 of Sec. 73.699.
    (iii) All stations operating on Channels 2 through 14 and those 
stations operating on Channels 15 through 69 licensed for a peak visual 
transmitter output power greater than one kW shall comply with the 
picture transmission amplitude characteristics shown in Figure 5 of 
Sec. 73.699.
    (iv) Stations operating on Channels 15 through 69 licensed for a 
peak visual transmitter output power of one kW or less shall comply with 
the picture transmission amplitude characteristic shown in Figure 5 or 
5a of Sec. 73.699.
    (10) A decrease in initial light intensity shall cause an increase 
in radiated power (negative transmission).
    (11) The reference black level shall be represented by a definite 
carrier level, independent of light and shade in the picture.
    (12) The blanking level shall be transmitted at 
75plus-minus2.5 percent of the peak carrier level.
    (13) The reference white level of the luminance signal shall be 
12.5plus-minus2.5 percent of the peak carrier level.
    (14) It shall be standard to employ horizontal polarization. 
However, circular or elliptical polarization may be employed if desired, 
in which case clockwise (right hand) rotation, as defined in the IEEE 
Standard Definition 42A65-3E2, and transmission of the horizontal and 
vertical components in time and space quadrature shall be used. For 
either omnidirectional or directional antennas the licensed effective 
radiated power of the vertically polarized component may not exceed the 
licensed effective radiated power of the horizontally polarized 
component. For directional antennas, the maximum effective radiated 
power of the vertically polarized component shall not exceed the maximum 
effective radiated power of the horizontally polarized component in any 
specified horizontal or vertical direction.
    (15) The effective radiated power of the aural transmitter must not 
exceed 22% of the peak radiated power of the visual transmitter.
    (16) The peak-to-peak variation of transmitter output within one 
frame of video signal due to all causes, including hum, noise, and low-
frequency response, measured at both scanning synchronizing peak and 
blanking level,

[[Page 214]]

shall not exceed 5 percent of the average scanning synchronizing peak 
signal amplitude. This provision is subject to change but is considered 
the best practice under the present state of the art. It will not be 
enforced pending a further determination thereof.
    (17) The reference black level shall be separated from the blanking 
level by the setup interval, which shall be 7.5plus-minus2.5 
percent of the video range from blanking level to the reference white 
level.
    (18) For monochrome transmission, the transmitter output shall vary 
in substantially inverse logarithmic relation to the brightness of the 
subject. No tolerances are set at this time. This provision is subject 
to change but is considered the best practice under the present state of 
the art. It will not be enforced pending a further determination 
thereof.
    (19) The color picture signal shall correspond to a luminance 
component transmitted as amplitude modulation of the picture carrier and 
a simultaneous pair of chrominance components transmitted as the 
amplitude modulation sidebands of a pair of suppressed subcarriers in 
quadrature.
    (20) Equation of complete color signal.
    (i) The color picture signal has the following composition:

            EM=EY'+[EQ' sin 
     (t+33 deg.)+EI' cos (t+33 deg.)]

Where:
EQ'=0.41(EB'-EY')+0.48(ER'-EY
').
EI'=-0.27(EB'-EY')+0.74(ER'-E
Y').
EY'=0.30ER'+0.59EG'+0.--
1EB'.

For color-difference frequencies below 500 kHz (see (iii) below), the 
signal can be represented by:

               EM=EY'+[(1/1.14)[(1/
                1.78)(EB'-EY') sin 
      t+(ER'-EY') cos t]]

    (ii) The symbols in paragraph (a)(20)(i) of this section have the 
following significance:
    EM is the total video voltage, corresponding to the 
scanning of a particular picture element, applied to the modulator of 
the picture transmitter.
    EY' is the gamma-corrected voltage of the monochrome 
(black-and-white) portion of the color picture signal, corresponding to 
the given picture element.

    Note: Forming of the high frequency portion of the monochrome signal 
in a different manner is permissible and may in fact be desirable in 
order to improve the sharpness on saturated colors.

    EQ' and EI' are the amplitudes of two 
orthogonal components of the chrominance signal corresponding 
respectively to narrow-band and wide-band axes.
    ER', EG', and EB' are the gamma-
corrected voltages corresponding to red, green, and blue signals during 
the scanning of the given picture element.
     is the angular frequency and is 2 times the frequency of 
the chrominance subcarrier.
    The portion of each expression between brackets in (i) represents 
the chrominance subcarrier signal which carries the chrominance 
information.
    The phase reference in the EM equation in (i) is the 
phase of the burst+180 deg., as shown in Figure 8 of Sec. 73.699. The 
burst corresponds to amplitude modulation of a continuous sine wave.

    (iii) The equivalent bandwidth assigned prior to modulation to the 
color difference signals EQ' and EI' are as 
follows:

Q-channel bandwidth:
    At 400 kHz less than 2 dB down.
    At 500 kHz less than 6 dB down.
    At 600 kHz at least 6 dB down.
I-channel bandwidth:
    At 1.3 MHz less than 2 dB down.
    At 3.6 MHz at least 20 dB down.

    (iv) The gamma corrected voltages ER', EG', 
and EB' are suitable for a color picture tube having primary 
colors with the following chromaticities in the CIE system of 
specification:

 
                                                             x       y
 
Red (R).................................................    0.67    0.33
Green (G)...............................................    0.21    0.71
Blue (B)................................................    0.14    0.08
 


and having a transfer gradient (gamma exponent) of 2.2 associated with 
each primary color. The voltages ER', EG', and 
EB' may be respectively of the form ER 
1/, EG 1/, and 
EB 1/ although other forms may be used 
with advances in the state of the art.

    Note: At the present state of the art it is considered inadvisable 
to set a tolerance on the value of gamma and correspondingly this 
portion of the specification will not be enforced.

    (v) The radiated chrominance subcarrier shall vanish on the 
reference white of the scene.

    Note: The numerical values of the signal specification assume that 
this condition will

[[Page 215]]

be reproduced as CIE Illuminant C (x=0.310, y=0.316).

    (vi) EY', EQ', EI', and the 
components of these signals shall match each other in time to 0.05 
 secs.
    (vii) The angles of the subcarrier measured with respect to the 
burst phase, when reproducing saturated primaries and their complements 
at 75 percent of full amplitude, shall be within 
plus-minus10 deg. and their amplitudes shall be within 
plus-minus20 percent of the values specified above. The 
ratios of the measured amplitudes of the subcarrier to the luminance 
signal for the same saturated primaries and their complements shall fall 
between the limits of 0.8 and 1.2 of the values specified for their 
ratios. Closer tolerances may prove to be practicable and desirable with 
advance in the art.
    (21) The interval beginning with line 17 and continuing through line 
20 of the vertical blanking interval of each field may be used for the 
transmission of test signals, cue and control signals, and 
identification signals, subject to the conditions and restrictions set 
forth below. Test signals may include signals designed to check the 
performance of the overall transmission system or its individual 
components. Cue and control signals shall be related to the operation of 
the TV broadcast station. Identification signals may be transmitted to 
identify the broadcast material or its source, and the date and time of 
its origination. Figures 6 and 7 of Sec. 73.699 identify the numbered 
lines referred to in this paragraph.
    (i) Modulation of the television transmitter by such signals shall 
be confined to the area between the reference white level and the 
blanking level, except where test signals include chrominance subcarrier 
frequencies, in which case positive excursions of chrominance components 
may exceed reference white, and negative excursions may extend into the 
synchronizing area. In no case may the modulation excursions produced by 
test signals extend beyond peak-of-sync, or to zero carrier level.
    (ii) The use of such signals shall not result in significant 
degradation of the program transmission of the television broadcast 
station, nor produce emission outside of the frequency band occupied for 
normal program transmissions.
    (iii) Such signals may not be transmitted during that portion of 
each line devoted to horizontal blanking.
    (iv) Regardless of other provisions of this paragraph, after June 
30, 1994, Line 19, in each field, may be used only for the transmission 
of the ghost-canceling reference signal described in OET Bulletin No. 
68, which is available from the Commission's Office of Engineering and 
Technology, Technical Standards Branch, 2025 M Street NW. Washington, DC 
20554. Notwithstanding the modulation limits contained in paragraph 
(a)(23)(i) of this section, the vertical interval reference signal 
formerly permitted on Line 19 and described in Figure 16 of Sec. 73.699, 
may be transmitted on any of lines 10 through 16 without specific 
Commission authorization, subject to the conditions contained in 
paragraphs (a)(21)(ii) and (a)(22)(ii) of this section.
    (22)(i) Line 21, in each field, may be used for the transmission of 
a program-related data signal which, when decoded, provides a visual 
depiction of information simultaneously being presented on the aural 
channel (captions). Line 21, field 2 may be used for transmission of a 
program-related data signal which, when decoded, identifies a rating 
level associated with the current program. Such data signals shall 
conform to the format described in figure 17 of Sec. 73.699 of this 
chapter, and may be transmitted during all periods of regular operation. 
On a space available basis, line 21 field 2 may also be used for text-
mode data and extended data service information.

    Note: The signals on Fields 1 and 2 shall be distinct data streams, 
for example, to supply captions in different languages or at different 
reading levels.

    (ii) At times when Line 21 is not being used to transmit a program 
related data signal, data signals which are not program related may be 
transmitted, Provided: the same data format is used and the information 
to be displayed is of a broadcast nature.
    (iii) The use of Line 21 for transmission of other data signals 
conforming to other formats may be used subject to prior authorization 
by the Commission.

[[Page 216]]

    (iv) The data signal shall cause no significant degradation to any 
portion of the visual signal nor produce emissions outside the 
authorized television channel.
    (v) Transmission of visual emergency messages pursuant to 
Sec. 73.1250 shall take precedence and shall be cause for interrupting 
transmission of data signals permitted under this paragraph.
    (23) Specific scanning lines in the vertical blanking interval may 
be used for the purpose of transmitting telecommunications signals in 
accordance with Sec. 73.646, subject to certain conditions:
    (i) Telecommunications may be transmitted on Lines 10-18 and 20, all 
of Field 2 and Field 1. Modulation level shall not exceed 70 IRE on 
lines 10, 11, and 12; and, 80 IRE on lines 13-18 and 20.
    (ii) No observable degradation may be caused to any portion of the 
visual or aural signals.
    (iii) Telecommunications signals must not produce emissions outside 
the authorized television channel bandwidth. Digital data pulses must be 
shaped to limit spectral energy to the nominal video baseband.
    (iv) Transmission of emergency visual messages pursuant to 
Sec. 73.1250 must take precedence over, and shall be cause for 
interrupting, a service such as teletext that provides a visual 
depiction of information simultaneously transmitted on the aural 
channel.
    (v) A reference pulse for a decoder associated adaptive equalizer 
filter designed to improve the decoding of telecommunications signals 
may be inserted on any portion of the vertical blanking interval 
authorized for data service, in accordance with the signal levels set 
forth in paragraph (a)(23)(i) of this section.
    (vi) All lines authorized for telecommunications transmissions may 
be used for other purposes upon prior approval by the Commission.
    (24) Licensees and permittees of TV broadcast and low power TV 
stations may insert non-video data into the active video portion of 
their TV transmission, subject to certain conditions:
    (i) The active video portion of the visual signal begins with line 
22 and continues through the end of each field, except it does not 
include that portion of each line devoted to horizontal blanking. 
Figures 6 and 7 of Sec. 73.699 identify the numbered line referred to in 
this paragraph;
    (ii) Inserted non-video data may be used for the purpose of 
transmitting a telecommunications service in accordance with 
Sec. 73.646. In addition to a telecommunications service, non-video data 
can be used to enhance the station's broadcast program service or for 
purposes related to station operations. Signals relating to the 
operation of TV stations include, but are not limited to program or 
source identification, relay of broadcast materials to other stations, 
remote cueing and order messages, and control and telemetry signals for 
the transmitting system; and
    (iii) A station may only use systems for inserting non-video 
information that have been approved in advance by the Commission. The 
criteria for advance approval of systems are as follows:
    (A) The use of such signals shall not result in significant 
degradation to any portion of the visual, aural, or program-related data 
signals of the television broadcast station;
    (B) No increase in width of the television broadcast channel (6 MHz) 
is permitted. Emissions outside the authorized television channel must 
not exceed the limitations given in Sec. 73.687(e). Interference to 
reception of television service either of co-channel or adjacent channel 
stations must not increase over that resulting from the transmission of 
programming without inserted data; and
    (C) Where required, system receiving or decoding devices must meet 
the TV interface device provisions of Part 15, Subpart H of this 
chapter.
    (iv) No protection from interference of any kind will be afforded to 
reception of inserted non-video data.
    (v) Upon request by an authorized representative of the Commission, 
the licensee of a TV station transmitting encoded programming must make 
available a receiving decoder to the Commission to carry out its 
regulatory responsibilities.
    (b) Subscription TV technical systems. The FCC may specify, as part 
of the advance approval of the technical system

[[Page 217]]

for transmitting encoded subscription programming, deviations from the 
power determination procedures, operating power levels, aural or video 
baseband signals, modulation levels or other characteristics of the 
transmitted signal as otherwise specified in this Subpart. Any decision 
to approve such operating deviations shall be solely at the discretion 
of the FCC.
    (c) TV multiplex subcarrier/stereophonic aural transmission 
standards.
    (1) The modulating signal for the main channel shall consist of the 
sum of the stereophonic (biphonic, quadraphonic, etc.) input signals.
    (2) The instantaneous frequency of the baseband stereophonic 
subcarrier must at all times be within the range 15 kHz to 120 kHz. 
Either amplitude or frequency modulation of the stereophonic subcarrier 
may be used.
    (3) One or more pilot subcarriers between 16 kHz and 120 kHz may be 
used to switch a TV receiver between the stereophonic and monophonic 
reception modes or to activate a stereophonic audio indicator light, and 
one or more subcarriers between 15 kHz and 120 kHz may be used for any 
other authorized purpose; except that stations employing the BTSC system 
of stereophonic sound transmission and audio processing may transmit a 
pilot subcarrier at 15,734 Hz,  2 Hz. Other methods of 
multiplex subcarrier or stereophonic aural transmission systems must 
limit energy at 15,734 Hz,  20 Hz, to no more than 
 0.125 kHz aural carrier deviation.
    (4) Aural baseband information above 120 kHz must be attenuated 40 
dB referenced to 25 kHz main channel deviation of the aural carrier.
    (5) For required transmitter performance, all of the requirements of 
Sec. 73.687(b) shall apply to the main channel, with the transmitter in 
the multiplex subcarrier or stereophonic aural mode.
    (6) For electrical performance standards of the transmitter, the 
requirements of Sec. 73.687(b) apply to the main channel.
    (7) Multiplex subcarrier or stereophonic aural transmission systems 
must be capable of producing and must not exceed  25 kHz 
main channel deviation of the aural carrier.
    (8) The arithmetic sum of non-multiphonic baseband signals between 
15 kHz and 120 kHz must not exceed 50 kHz deviation of the 
aural carrier.
    (9) Total modulation of the aural carrier must not exced 
 75 kHz.standard; and adopting a standard for allocation and 
assignment purposes only. In addition, the Commission sought comment on 
requiring use of some layers of the ATSC DTV Standard but making others 
optional.
    (1) The SBA defines affiliation in 13 C.F.R. 121.103. In this 
context, the SBA's definition of affiliate is analogous to our 
attribution rules. Generally, under the SBA's definition, concerns are 
affiliates of each other when one concern controls or has the power to 
control the other, or a third party or parties controls or has the power 
to control both. 13 C.F.R. 121.103(a)(1). The SBA considers factors such 
as ownership, management, previous relationships with or ties to another 
concern, and contractual relationships, in determining whether 
affiliation exists. 13 C.F.R. 121.103(a)(2). Instead of making an 
independent determination of whether television stations were affiliated 
based on SBA's definitions, we relied on the data bases available to us 
to provide us with that information.
    (d) Digital broadcast television transmission standard. Transmission 
of digital broadcast television (DTV) signals shall comply with the 
standards for such transmissions set forth in Advanced Television 
Systems Committee (ATSC) Doc. A/52 (``ATSC Standard Digital Audio 
Compression (AC-3), 20 Dec 95'') and ATSC Doc A/53 (``ATSC Digital 
Television Standard, 16 Sep 95''), except for Section 5.1.2 
(``Compression format constraints'') of Annex A (``Video Systems 
Characteristics'') and the phrase ``see Table 3'' in Section 5.1.1 Table 
2 and Section 5.1.2 Table 4. Although not incorporated herein by 
reference, licensees may also consult ATSC Doc. A/54 (``Guide to the Use 
of the ATSC Digital Television Standard, 4 Oct 95'') for guidance. This 
incorporation by reference was approved by the Director of the Federal 
Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies 
may be inspected at the Federal Communications Commission, 1919 M 
Street, NW., Washington, DC

[[Page 218]]

20554 or at the Office of the Federal Register, 800 N. Capitol Street, 
NW., Washington, DC. Copies of ATSC A/52, A/53, and A/54 can be obtained 
from the Commission's contract copier or from the Advanced Television 
Systems Committee, 1750 K Street, NW., suite 800, Washington, DC 20006. 
They are also available in their entirety on the Internet at http://
www.atsc.org.


(Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082 (47 U.S.C. 154, 
155, 303))

[28 FR 13660, Dec. 14, 1963]

    Editorial Note: For Federal Register citations affecting 
Sec. 73.682, see the List of CFR Sections Affected appearing in the 
Finding Aids section of this volume.



Sec. 73.683  Field strength contours.

    (a) In the authorization of TV stations, two field strength contours 
are considered. These are specified as Grade A and Grade B and indicate 
the approximate extent of coverage over average terrain in the absence 
of interference from other television stations. Under actual conditions, 
the true coverage may vary greatly from these estimates because the 
terrain over any specific path is expected to be different from the 
average terrain on which the field strength charts were based. The 
required field strength, F (50,50), in dB above one micro-volt per meter 
(dBu) for the Grade A and Grade B contours are as follows:

------------------------------------------------------------------------
                                                    Grade A     Grade B
                                                     (dBu)       (dBu)
------------------------------------------------------------------------
Channels 2-6....................................          68          47
Channels 7-13...................................          71          56
Channels 14-69..................................          74          64
------------------------------------------------------------------------

    (b) It should be realized that the F (50,50) curves when used for 
Channels 14-69 are not based on measured data at distances beyond about 
48.3 kilometers (30 miles). Theory would indicate that the field 
strengths for Channels 14-69 should decrease more rapidly with distance 
beyond the horizon than for Channels 2-6, and modification of the curves 
for Channels 14-69 may be expected as a result of measurements to be 
made at a later date. For these reasons, the curves should be used with 
appreciation of their limitations in estimating levels of field 
strength. Further, the actual extent of service will usually be less 
than indicated by these estimates due to interference from other 
stations. Because of these factors, the predicted field strength 
contours give no assurance of service to any specific percentage of 
receiver locations within the distances indicated. In licensing 
proceedings these variations will not be considered.
    (c) The field strength contours will be considered for the following 
purposes only:
    (1) In the estimation of coverage resulting from the selection of a 
particular transmitter site by an applicant for a TV station.
    (2) In connection with problems of coverage arising out of 
application of Sec. 73.3555.
    (3) In determining compliance with Sec. 73.685(a) concerning the 
minimum field strength to be provided over the principal community to be 
served.

[44 FR 36039, June 20, 1979, as amended at 47 FR 35990, Aug. 18, 1982; 
50 FR 23699, June 5, 1985; 50 FR 32416, Aug. 12, 1985]



Sec. 73.684  Prediction of coverage.

    (a) All predictions of coverage made pursuant to this section shall 
be made without regard to interference and shall be made only on the 
basis of estimated field strengths. The peak power of the visual signal 
is used in making predictions of coverage.
    (b) Predictions of coverage shall be made only for the same purposes 
as relate to the use of field strength contours as specified in 
Sec. 73.683(c).
    (c) In predicting the distance to the field strength contours, the F 
(50,50) field strength charts (Figures 9 and 10 of Sec. 73.699) shall be 
used. If the 50% field strength is defined as that value exceeded for 
50% of the time, these F (50,50) charts give the estimated 50% field 
strengths exceeded at 50% of the locations in dB above 1 uV/m. The 
charts are based on an effective power of 1 kW radiated form a half-wave 
dipole in free space, which produces an unattenuated field strength at 
1.61 kilometers (1 mile) of about 103 dB above 1 uV/m. To use the charts 
to predict the distance to a given contour, the following procedure is 
used: Convert the effective radiated power in kilowatts for the 
appropriate azimuth into decibel value referenced to 1 kW (dBu).

[[Page 219]]

If necessary, convert the selected contour to the decibel value (dBu) 
above 1 microvolt per meter (1 uV/m). Subtract the power value in dBk 
from the contour value in dBu. Note that for power less than 1 kW, the 
difference value will be greater than the contour value because the 
power in dBk is negative. Locate the difference value obtained on the 
vertical scale at the left edge of the chart. Follow the horizontal line 
for that value into the chart to the point of intersection with the 
vertical line above the height of the antenna above average terrain for 
the appropriate azimuth located on the scale at the bottom of the chart. 
If the point of intersection does not fall exactly on a distance curve, 
interpolate between the distance curves below and above the intersection 
point. The distance values for the curves are located along the right 
edge of the chart.
    (1) In predicting the distance to the Grade A and Grade B field 
strength contours, the effective radiated power to be used is that 
radiated at the vertical angle corresponding to the depression angle 
between the transmitting antenna center of radiation and the radio 
horizon as determined individually for each azimuthal direction 
concerned. The depression angle is based on the difference in elevation 
of the antenna center of radiation above the average terrain and the 
radio horizon, assuming a smooth sperical earth with a radius of 8,495.5 
kilometers (5,280 miles) and shall be determined by the following 
equation:

A = 0.0277 H

Where:

A is the depression angle in degrees.
H is the height in meters of the transmitting antenna radiation center 
          above average terrain of the 3.2--16.1 kilometers (2-10 miles) 
          sector of the pertinent radial.

    This formula is empirically derived for the limited purpose 
specified here. Its use for any other purpose may be inappropriate.

    (2) In case where the relative field strength at the depression 
angle determined by the above formula is 90% or more of the maximum 
field strength developed in the vertical plane containing the pertaining 
radial, the maximum radiation shall be used.
    (3) In predicting field strengths for other than the Grade A and 
Grade B contours, the effective radiated power to be used is to be based 
on the appropriate antenna vertical plane radiation pattern for the 
azimuthal direction concerned.
    (4) Applicants for new TV stations or changes in the facilities of 
existing TV stations must submit to the FCC a showing as to the location 
of their stations' or proposed stations' predicted Grade A and Grade B 
contours, determined in accordance with Sec. 73.684. This showing is to 
include maps showing these contours, except where applicants have 
previously submitted material to the FCC containing such information and 
it is found upon careful examination that the contour locations 
indicated therein would not change, on any radial, when the locations 
are determined under this Section. In the latter cases, a statement by a 
qualified engineer to this effect will satisfy this requirement and no 
contour maps need be submitted.
    (d) The antenna height to be used with these charts is the height of 
the radiation center of the antenna above the average terrain along the 
radial in question. In determining the average elevation of the terrain, 
the elevations between 3.2-16.1 kilometers (2-10 miles) from the antenna 
site are employed. Profile graphs shall be drawn for 8 radials beginning 
at the antenna site and extending 16.1 kilometers (10 miles) therefrom. 
The radials should be drawn for each 45 degrees of azimuth starting with 
the True North. At least one radial must include the principal community 
to be served even though such community may be more than 16.1 kilometers 
(10 miles) from the antenna site. However, in the event none of the 
evenly spaced radials include the principal community to be served and 
one or more such radials are drawn in addition to the 8 evenly spaced 
radials, such additional radials shall not be employed in computing the 
antenna height above average terrain. Where the 3.2-16.1 kilometers (2-
10 mile) portion of a radial extends in whole or in part over large 
bodies of water as specified in paragraph (e) of this section or extends 
over foreign territory but the Grade B strength contour encompasses

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land area within the United States beyond the 16.1 kilometers (10 mile) 
portion of the radial, the entire 3.2-16.1 kilometers (2-10 mile) 
portion of the radial shall be included in the computation of antenna 
height above average terrian. However, where the Grade B contour does 
not so encompass United States land area and (1) the entire 3.2-16.1 
kilometers (2-10 mile) portion of the radial extends over large bodies 
of water of foreign territory, such radial shall be completely omitted 
from the computation of antenna height above average terrain, and (2) 
where a part of the 3.2-16.1 kilometers (2-10 mile) portion of a radial 
extends over large bodies of water or over foreign territory, only that 
part of the radial extending from the 3.2 kilometer (2 mile) sector to 
the outermost portion of land area within the United States covered by 
the radial shall be employed in the computation of antenna height above 
average terrian. The profile graph for each radial should be plotted by 
contour intervals of from 12.2-30.5 meters (40-100 feet) and, where the 
data permits, at least 50 points of elevation (generally uniformly 
spaced) should be used for each radial. In instances of very rugged 
terrain where the use of contour intervals of 30.5 meters (100 feet) 
would result in several points in a short distance, 61.0-122.0 meter 
(200-400 foot) contour intervals may be used for such distances. On the 
other hand, where the terrain is uniform or gently sloping the smallest 
contour interval indicated on the topograhic may (see paragraph (g) of 
this section) should be used, although only relatively few points may be 
available. The profile graphs should indicate the topography accurately 
for each radial, and the graphs should be plotted with the distance in 
kilometers as the abscissa and the elevation in meters above mean sea 
level as the ordinate. The profile graphs should indicate the source of 
the topographical data employed. The graph should also show the 
elevation of the center of the radiating system. The graph may be 
plotted either on rectangular coordinate paper or on special paper which 
shows the curvature of the earth. It is not necessary to take the 
curvature of the earth into consideration in this procedure, as this 
factor is taken care of in the charts showing signal strengths. The 
average elevation of the 12.9 kilometer (8 miles) distance between 3.2-
16.1 kilometers (2-10 miles) from the antenna site should then be 
determined from the profile graph for each radial. This may be obtained 
by averaging a large number of equally spaced points, by using a 
planimeter, or by obtaining the median elevation (that exceeded for 50% 
of the distance) in sectors and averaging those values.

    Note: The Commission will, upon a proper showing by an existing 
station that the application of this rule will result in an unreasonable 
power reduction in relation to other stations in close proximity, 
consider requests for adjustment in power on the basis of a common 
average terrain figure for the stations in question as determined by the 
FCC.

    (e) In instance where it is desired to determine the area in square 
kilometers within the Grade A and Grade B field strength contours, the 
area may be determined from the coverage map by planimeter or other 
approximate means; in computing such areas, exclued (1) areas beyond the 
borders of the United States, and (2) large bodies of water, such as 
ocean areas, gulfs sounds, bays, large lakes, etc., but not rivers.
    (f) In cases where terrain in one or more directions from the 
antenna site departs widely from the average elevation of the 3.2 to 
16.1 kilometers (2 to 10 mile) sector, the prediction method may 
indicate contour distances that are different from what may be expected 
in practice. For example, a mountain ridge may indicate the practical 
limit of service although the prediction method may indicate otherwise. 
In such case the prediction method should be followed, but a 
supplemental showing may be made concerning the contour distances as 
determined by other means. Such supplemental showing should describe the 
procedure employed and should include sample calculations. Maps of 
predicted coverage should include both the coverage as predicted by the 
regular method and as predicted by a supplemental method. When 
measurements of area are required, these should include the area 
obtained by the regular predicted method and the area obtained by the

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supplemental method. In directions where the terrain is such that 
negative antenna heights or heights below 30.5 meters (100 feet) for the 
3.2 to 16.1 kilometers (2 to 10 mile) sector are obtained, an assumed 
height of 30.5 meters (100 feet) shall be used for the prediction of 
coverage. However, where the actual contour distances are critical 
factors, a supplemental showing of expected coverage must be included 
together with a description of the method employed in predicting such 
coverage. In special cases, the Commission may require additional 
information as to terrain and coverage.
    (g) In the preparation of the profile graph previously described, 
and in determining the location and height above sea level of the 
antenna site, the elevation or contour intervals shall be taken from the 
United States Geological Survey Topographic Quadrangle Maps, United 
States Army Corps of Engineers' maps or Tennessee Valley Authority maps, 
whichever is the latest, for all areas for which