Goto Section: 74.734 | 74.736 | Table of Contents
FCC 74.735
Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 74.735 Power limitations.
(a) The maximum peak effective radiated power (ERP) of an analog low power
TV, TV translator, or TV booster station shall not exceed:
(1) 3 kW for VHF channels 2–13; and
(2) 150 kW for UHF channels 14–69.
(b) The maximum ERP of a digital low power TV, TV translator, or TV booster
station (average power) shall not exceed:
(1) 300 watts for VHF channels 2–13; and
(2) 15 kW for UHF channels 14–69.
(c) The limits in paragraphs (a) and (b) apply separately to the effective
radiated powers that may be obtained by the use of horizontally or
vertically polarized transmitting antennas, providing the applicable
provisions of Sec. Sec. 74.705, 74.706, 74.707 and 74.709 are met. For either
omnidirectional or directional antennas, where the ERP values of the
vertically and horizontally polarized components are not of equal strength,
the ERP limits shall apply to the polarization with the larger ERP.
Applications proposing the use of directional antenna systems must be
accompanied by the following:
(1) Complete description of the proposed antenna system, including the
manufacturer and model number of the proposed directional antenna. It is not
acceptable to label the antenna with only a generic term such as “Yagi” or
“Dipole”. A specific model number must be provided. 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
should be described as a “custom” or “composite” antenna, as appropriate. A
full description of the design of the antenna should also be submitted.
(2) 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 °
corresponds to the maximum radiation of the directional antenna or,
alternatively in the case of a symmetrical pattern, to the line of symmetry.
The 0 ° on the plot should be referenced to the actual azimuth with respect
to true North.
(3) A tabulation of the relative field pattern required in paragraph (c)(2),
of this section. The tabulation should use the same zero degree reference as
the plotted pattern, and be tabulated at least every 10 °. In addition,
tabulated values of all maximas and minimas, with their corresponding
azimuths, should be submitted.
(4) All horizontal plane patterns must be plotted to the largest scale
possible on unglazed letter-size polar coordinate paper (main engraving
approximately 18 cm × 25 cm (7 inches × 10 inches)) using only scale
divisions and subdivisions of 1, 2, 2.5 or 5 times 10-nth. Values of field
strength on any pattern less than 10% of the maximum field strength plotted
on that pattern must be shown on an enlarged scale.
(5) The horizontal 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 composed of two or more individual antennas, not
the patterns for each of the individual antennas, must be submitted.
[ 30 FR 8847 , July 14, 1965, as amended at 41 FR 28267 , July 9, 1976; 47 FR 21500 , May 18, 1982; 48 FR 21487 , May 12, 1983; 52 FR 7423 , Mar. 11, 1987;
52 FR 31404 , Aug. 20, 1987; 58 FR 44951 , Aug. 25, 1993; 62 FR 26722 , May 14,
1997]
Goto Section: 74.734 | 74.736
Goto Year: 2006 |
2008
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