Goto Section: 73.314 | 73.316 | Table of Contents
Revised as of November 23, 2020
Goto Year:2020 |
§ 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
(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 § 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 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; 65 FR 79778 , Dec. 20, 2000]
Goto Section: 73.314 | 73.316
Goto Year: 2020 |
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