Sec.  22.565   Transmitting power limits.

   

   Link to an amendment published at  70 FR 19309 , Apr. 13, 2005.

   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.

   (g) Other transmitters. The ERP of dispatch and auxiliary test
   transmitters must not exceed 100 watts.