§ 24.232   Power and antenna height limits.

   (a)(1) Base stations with an emission bandwidth of 1 MHz or less are limited
   to 1640 watts equivalent isotropically radiated power (EIRP) with an antenna
   height up to 300 meters HAAT, except as described in paragraph (b) below.

   (2) Base stations with an emission bandwidth greater than 1 MHz are limited
   to 1640 watts/MHz equivalent isotropically radiated power (EIRP) with an
   antenna height up to 300 meters HAAT, except as described in paragraph (b)
   below.

   (3)  Base  station  antenna  heights may exceed 300 meters HAAT with a
   corresponding reduction in power; see Tables 1 and 2 of this section.

   (4)  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, With
   Emission Bandwidth of 1 MHz or Less
   HAAT in meters Maximum EIRP watts
   ≤300                         1640
   ≤500                         1070
   ≤1000                         490
   ≤1500                         270
   ≤2000                          160

   Table 2—Reduced Power for Base Station Antenna Heights Over 300 Meters, With
   Emission Bandwidth Greater Than 1 MHz
   HAAT in meters Maximum EIRP
   watts/MHz
   ≤300 1640
   ≤500 1070
   ≤1000 490
   ≤1500 270
   ≤2000 160

   (b)(1) 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, with an
   emission bandwidth of 1 MHz or less are limited to 3280 watts equivalent
   isotropically radiated power (EIRP) with an antenna height up to 300 meters
   HAAT.

   (2) 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, with an emission
   bandwidth  greater than 1 MHz are limited to 3280 watts/MHz equivalent
   isotropically radiated power (EIRP) with an antenna height up to 300 meters
   HAAT.

   (3)  Base  station  antenna  heights may exceed 300 meters HAAT with a
   corresponding reduction in power; see Tables 3 and 4 of this section.

   (4)  The service area boundary limit and microwave protection criteria
   specified in § § 24.236 and 24.237 apply.

   (5)  Operation  under  this paragraph (b) at power limits greater than
   permitted under paragraph (a) of this section must be coordinated in advance
   with all broadband PCS licensees authorized to operate on adjacent frequency
   blocks 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 3—Reduced Power for Base Station Antenna Heights Over 300 Meters, With
   Emission Bandwidth of 1 MHz or Less
   HAAT in meters Maximum EIRP watts
   ≤300                         3280
   ≤500                         2140
   ≤1000                         980
   ≤1500                         540
   ≤2000                          320

   Table 4—Reduced Power for Base Station Antenna Heights Over 300 Meters, With
   Emission Bandwidth Greater Than 1 MHz
   HAAT in meters Maximum EIRP
   watts/MHz
   ≤300 3280
   ≤500 2140
   ≤1000 980
   ≤1500 540
   ≤2000 320

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

   (d) Power measurements for transmissions by stations authorized under this
   section may be made either in accordance with a Commission-approved average
   power technique or in compliance with paragraph (e) of this section. In both
   instances, equipment employed must be authorized in accordance with the
   provisions of § 24.51. In measuring transmissions in this band using an
   average power technique, the peak-to-average ratio (PAR) of the transmission
   may not exceed 13 dB.

   (e) 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.

   Note to § 24.232: Height above average terrain (HAAT) is to be calculated
   using the method set forth in § 24.53 of this part.

   [ 73 FR 24183 , May 2, 2008]

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