§  24.232   Power and antenna height limits.

   Link to an amendment published at  73 FR 24183 , May 2, 2008.

   (a) Base stations are limited to 1640 watts peak equivalent
   isotropically radiated power (EIRP) with an antenna height up to 300
   meters HAAT, except as described in paragraph (b) below. See § 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. The service area boundary limit and microwave protection
   criteria specified in § § 24.236 and 24.237 apply.

   Table 1—Reduced Power for Base Station Antenna Heights Over 300 Meters
   HAAT in meters Maximum EIRP watts
   ≤ 300                        1640
   ≤ 500                        1070
   ≤ 1000                        490
   ≤ 1500                        270
   ≤ 2000                        160

   (b) Base stations that are located in counties with population
   densities of 100 persons or fewer per square mile, based upon the most
   recently available population statistics from the Bureau of the Census,
   are limited to 3280 watts peak equivalent isotropically radiated power
   (EIRP) with an antenna height up to 300 meters HAAT; See § 24.53 for
   HAAT calculation method. Base station antenna heights may exceed 300
   meters with a corresponding reduction in power; see Table 2 of this
   section. The service area boundary limit and microwave protection
   criteria specified in § § 24.236 and 24.237 apply. Operation under this
   paragraph must be coordinated in advance with all PCS licensees within
   120 kilometers (75 miles) of the base station and is limited to base
   stations located more than 120 kilometers (75 miles) from the Canadian
   border and more than 75 kilometers (45 miles) from the Mexican border.

   Table 2—Reduced Power for Base Station Antenna Heights Over 300 Meters
   HAAT in meters Maximum EIRP watts
   ≤ 300                        3280
   ≤ 500                        2140
   ≤ 1000                        980
   ≤ 1500                        540
   ≤ 2000                        320

   (c) Mobile/portable stations are limited to 2 watts EIRP peak power and
   the equipment must employ means to limit the power to the minimum
   necessary for successful communications.

   (d) 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.

   [ 70 FR 61059 , Oct. 20, 2005]