Goto Section: 74.734 | 74.736 | Table of Contents
FCC 74.735
Revised as of October 1, 2010
Goto Year:2009 |
2011
§ 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 § § 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 0DEG corresponds to the maximum radiation of the
directional antenna or, alternatively in the case of a symmetrical
pattern, to the line of symmetry. The 0DEG 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
10DEG. 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: 2009 |
2011
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