Goto Section: 74.734 | 74.736 | Table of Contents

FCC 74.735
Revised as of May 23, 2019
Goto Year:2018 | 2020
  § 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) 3 kW 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 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;  76 FR 44828 , July 27, 2011]

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Goto Section: 74.734 | 74.736

Goto Year: 2018 | 2020
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