Sec.  22.727   Power limits for conventional rural radiotelephone transmitters.

   

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

   The transmitting power of transmitters operating on the channels
   listed in Sec. 22.725 must not exceed the limits in this section.

   (a) Maximum ERP. The effective radiated power (ERP) of central office
   and rural subscriber station 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 central office station transmitters must not
   exceed 500 Watts.

   (c) Height-power limits. Except as provided in paragraph (d) of this
   section, the ERP of central office station 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. Central office station
   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 central office station 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 central office station
   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
   454.000 MHz.

   (f) Meteor burst stations. The transmitter output power for stations
   using meteor burst propagation modes must not exceed 2000 Watts for
   central office stations and 500 Watts for rural subscriber stations.