Power and antenna height requirements.
(a) Minimum requirements.
Applications will not be accepted for filing if they specify less than −10 dBk (100 watts) horizontally polarized visual effective radiated power in any horizontal direction. No minimum antenna height above average terrain is specified.
(b) Maximum power.
Applications will not be accepted for filing if they specify a power which exceeds the maximum permitted boundaries specified in the following formulas:
Channels 2-6 in Zone I:
−10 dBk ≤ ERPMax≤20 dBk
Channels 2-6 in Zones II and III:
ERPMax=67.57-17.08* Log10 (HAAT)
10 dBk ≤ ERPMax≤20 dBk
Channels 7-13 in Zone I:
ERPMax=107.57-33.24* Log10 (HAAT)
−4.0 dBk ≤ ERPMax ≤25 dBk
Channels 7-13 in Zones II and III:
ERPMax=72.57-17.08* Log10 (HAAT)
15 dBk ≤ ERPMax≤25 dBk
Channels 14-69 in Zones I, II, and III:
ERPMax=84.57-17.08* Log10 (HAAT)
27 dBk ≤ ERPMax≤37 dBk
The boundaries specified are to be used to determine the maximum possible combination of antenna height and ERPdBk. When specifying an ERPdBk less than that permitted by the lower boundary, any antenna HAAT can be used. Also, for values of antenna HAAT greater than 2,300 meters the maximum ERP is the lower limit specified for each equation.
The effective radiated power in any horizontal or vertical direction may not exceed the maximum values permitted by this section.
The effective radiated power at any angle above the horizontal shall be as low as the state of the art permits, and in the same vertical plane may not exceed the effective radiated power in either the horizontal direction or below the horizontal, whichever is greater.
(c) Determination of applicable rules.
The zone in which the transmitter of a television station is located or proposed to be located determines the applicable rules with respect to maximum antenna heights and powers for VHF stations when the transmitter is located in Zone I and the channel to be employed is located in Zone II, or the transmitter is located in Zone II and the channel to be employed is located in Zone I.
[28 FR 13660, Dec. 14, 1963, as amended at 42 FR 20823, Apr. 22, 1977; 42 FR 48881, Sept. 26, 1977; 47 FR 35990, Aug. 18, 1982; 50 FR 23698, June 5, 1985; 56 FR 49707, Oct. 1, 1991; 58 FR 51250, Oct. 1, 1993]