§  22.535   Effective radiated power limits.

   The effective radiated power (ERP) of transmitters operating on the
   channels listed in §  22.531 must not exceed the limits in this section.

   (a) Maximum ERP. The ERP must not exceed the applicable limits in this
   paragraph under any circumstances.
   Frequency range (MHz) Maximum ERP (Watts)
   35-36                                 600
   43-44                                 500
   152-159                              1400
   931-932                              3500

   (b) Basic power limit. Except as provided in paragraph (d) of this
   section, the ERP of transmitters on the VHF channels must not exceed
   500 Watts.

   (c) Height-power limit. Except as provided in paragraph (d) of this
   section, the ERP of transmitters on the VHF channels must not exceed
   the amount that would result in an average distance to the service
   contour of 32.2 kilometers (20 miles). The average distance to the
   service contour is calculated by taking the arithmetic mean of the
   distances determined using the procedures specified in §  22.537 for the
   eight cardinal radial directions, excluding cardinal radial directions
   for which 90% or more of the distance so calculated is over water.

   (d) Encompassed interfering contour areas. Transmitters are exempt from
   the basic power and height-power limits of this section if the area
   within their interfering contours is totally encompassed by the
   interfering contours of operating co-channel base transmitters
   controlled by the same licensee. For the purpose of this paragraph,
   operating transmitters are authorized transmitters that are providing
   service to subscribers.

   (e) Adjacent channel protection. The ERP of transmitters must not
   exceed 500 Watts if they:

   (1) Transmit on a channel in the 152-159 MHz frequency range and are
   located less than 5 kilometers (3.1 miles) from any station licensed in
   the Private Radio Services that receives on an adjacent channel; or,

   (2) Transmit on channel 158.10 or 158.70 MHz and are located less than
   5 kilometers (3.1 miles) from any station licensed in the Public Mobile
   Services that receives on either of the following adjacent channels:
   158.07 MHz or 158.67 MHz.

   (f) Signal boosters. The effective radiated power of signal boosters
   must not exceed 5 watts ERP under any normal operating condition.

   [ 59 FR 59507 , Nov. 17, 1994, as amended at  61 FR 31051 , June 19, 1996]

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