Sec. 22.535  Effective radiated power limits.

    The effective radiated power (ERP) of transmitters operating on the 
channels listed in Sec. 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.

                                                                        
------------------------------------------------------------------------
                                                             Maximum ERP
                   Frequency range (MHz)                       (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 Sec. 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]