Sec. 24.232  Power and antenna height limits.

    (a) Base stations are limited to 1640 watts peak equivalent 
isotropically radiated power (e.i.r.p.) with an antenna height up to 300 
meters HAAT. See Sec. 24.53 for HAAT calculation method. Base station 
antenna heights may exceed 300 meters with a corresponding reduction in 
power; see Table 1 of this section. In no case may the peak output power 
of a base station transmitter exceed 100 watts. The service area 
boundary limit and microwave protection criteria specified in 
Sec. 24.236 and Sec. 24.237 apply.

Table 1.--Reduced Power for Base Station Antenna Heights Over 300 Meters
------------------------------------------------------------------------
                                                                Maximum 
                        HAAT in meters                          e.i.r.p.
                                                                (watts) 
------------------------------------------------------------------------
300...............................................      1,640
500...............................................      1,070
1,000.............................................        490
1,500.............................................        270
2,000.............................................        160
------------------------------------------------------------------------

    (b) Mobile/portable stations are limited to 2 watts e.i.r.p. peak 
power and the equipment must employ means to limit the power to the 
minimum necessary for successful communications.
    (c) Peak transmit power must be measured over any interval of 
continuous transmission using instrumentation calibrated in terms of an 
rms-equivalent voltage. The measurement results shall be properly 
adjusted for any instrument limitations, such as detector response 
times, limited resolution bandwidth capability when compared to the 
emission bandwidth, sensitivity, etc., so as to obtain a true peak 
measurement for the emission in question over the full bandwidth of the 
channel.