Sec.  22.565   Transmitting power limits.

   The transmitting power of base, mobile and fixed transmitters operating on
   the channels listed in  Sec. 22.561 must not exceed the limits in this section.

   (a) Maximum ERP. The effective radiated power (ERP) of base and fixed
   transmitters must not exceed the applicable limits in this paragraph under
   any circumstances.


------------------------------------------------------------------------
                                                             Maximum ERP
                   Frequency range (MHz)                       (watts)
------------------------------------------------------------------------
152-153....................................................         1400
157-159....................................................          150
454-455....................................................         3500
459-460....................................................          150
------------------------------------------------------------------------

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

   (c) Height-power limits. Except as provided in paragraph (d) of this
   section, the ERP of base transmitters must not exceed the amount that would
   result in an average distance to the service contour of 41.6 kilometers (26
   miles) for VHF channels or 30.7 kilometers (19 miles) for UHF channels. The
   average distance to the service contour is calculated by taking the
   arithmetic mean of the distances determined using the procedures specified
   in  Sec. 22.567 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. Base 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 based 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 base and fixed transmitters must
   not exceed 500 Watts if they transmit on channel 454.025 MHz and are located
   less than 7 kilometers (4.3 miles) from any Private Radio Services station
   receiving on adjacent channel 454.0000 MHz.

   (f) Mobile transmitters. The transmitter output power of mobile transmitters
   must not exceed 60 watts.

   [ 59 FR 59507 , Nov. 17, 1994, as amended at  70 FR 19309 , Apr. 13, 2005]