§  73.614   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:

   (1) Channels 2-6 in Zone I:

   ERPMax =102.57-33.24*Log10 (HAAT)

   And,

   -10 dBk <= ERPMax <=20 dBk

   (2) Channels 2-6 in Zones II and III:

   ERPMax =67.57-17.08* Log10 (HAAT)

   And,

   10 dBk <= ERPMax <=20 dBk

   (3) Channels 7-13 in Zone I:

   ERPMax =107.57-33.24* Log10 (HAAT)

   And,

   -4.0 dBk <= ERPMax <=25 dBk

   (4) Channels 7-13 in Zones II and III:

   ERPMax =72.57-17.08* Log10 (HAAT)

   And,

   15 dBk <= ERPMax <=25 dBk

   (5) Channels 14-69 in Zones I, II, and III:

   ERPMax =84.57-17.08* Log10 (HAAT)

   And,

   27 dBk <= ERPMax <=37 dBk

   Where:

   ERPMax =Maximum Effective Radiated Power measured in decibels above 1
   kW (dBk).

   HAAT=Height Above Average Terrain measured in meters.

   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.

   (6) The effective radiated power in any horizontal or vertical
   direction may not exceed the maximum values permitted by this section.

   (7) 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]

   return arrow Back to Top