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 Secs. 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 deg. 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 deg. 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 deg.. 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 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 on any

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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]