[Code of Federal Regulations] [Title 47, Volume 2] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR27.50] [Page 381-382] TITLE 47--TELECOMMUNICATION CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) PART 27_MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES--Table of Contents Subpart C_Technical Standards Sec. 27.50 Power and antenna height limits. (a) The following power limits apply to the 2305-2320 MHz and 2345- 2360 MHz bands: (1) Fixed, land, and radiolocation land stations transmitting are limited to 2000 watts peak equivalent isotropically radiated power (EIRP). (2) Mobile and radiolocation mobile stations transmitting are limited to 20 watts EIRP peak power. (b) The following power and antenna height limits apply to transmitters operating in the 746-764 MHz and 776-794 MHz bands: (1) Fixed and base stations transmitting in the 746-764 MHz band and the 777-792 MHz band must not exceed an effective radiated power (ERP) of 1000 watts and an antenna height of 305 m height above average terrain (HAAT), except that antenna heights greater than 305 m HAAT are permitted if power levels are reduced below 1000 watts ERP in accordance with Table 1 of this section; (2) Control stations and mobile stations transmitting in the 747-762 MHz band and the 776-794 MHz band and fixed stations transmitting in the 776-777 MHz band and the 792-794 MHz band are limited to 30 watts ERP; (3) Portable stations (hand-held devices) transmitting in the 747- 762 MHz band and the 776-794 MHz band are limited to 3 watts ERP; (4) Maximum composite transmit power shall be measured over any interval of continuous transmission using instrumentation calibrated in terms of 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, etc., so as to obtain a true maximum composite measurement for the emission in question over the full bandwidth of the channel. (c) The following power and antenna height requirements apply to stations transmitting in the 698-746 MHz band: (1) Fixed and base stations are limited to a maximum effective radiated power (ERP) of 50 kW, with the limitation on antenna heights as follows: (i) Fixed and base stations with an ERP of 1000 watts or less must not exceed an antenna height of 305 m height above average terrain (HAAT) except when the power is reduced in accordance with Table 1 of this section; (ii) The antenna height for fixed and base stations with an ERP greater than 1000 watts but not exceeding 50 kW is limited only to the extent required to satisfy the requirements of Sec. 27.55(b). (2) Control and mobile stations are limited to 30 watts ERP. (3) Portable stations (hand-held devices) are limited to 3 watts ERP. (4) Maximum composite transmit power shall be measured over any interval of continuous transmission using instrumentation calibrated in terms of 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, etc., so as to obtain a true maximum composite measurement for the emission in question over the full bandwidth of the channel. (5) Licensees intending to operate a base or fixed station at a power level greater than 1 kW ERP must provide advanced notice of such operation to the Commission and to licensees authorized in their area of operation. Licensees that must be notified are all licensees authorized under this part to operate a base or fixed station on an adjacent spectrum block at a location within 75 km of the base or fixed station operating at a power level greater than 1 kW ERP. Notices must provide the location and operating parameters of the base or fixed station operating at a power level greater than 1 kW ERP, including the station's ERP, antenna coordinates, antenna height above ground, and vertical antenna pattern, and such notices must be provided at least 90 days prior to the commencement of station operation. (d) The following power and antenna height requirements apply to stations transmitting in the 1710-1755 MHz and 2110-2155 MHz bands: [[Page 382]] (1) Fixed and base stations transmitting in the 2110-2155 MHz band are limited to a peak effective isotropic radiated power (EIRP) of 1640 watts and a peak output power of 100 watts. (2) Fixed, mobile, and portable (hand-held) stations operating in the 1710-1755 MHz band are limited to a peak EIRP of 1 watt. Fixed stations operating in this band are limited to a maximum antenna height of 10 meters above ground, and mobile and portable stations must employ a means for limiting power to the minimum necessary for successful communications. (e) The following power limits apply to the paired 1392-1395 MHz and 1432-1435 MHz bands as well as the unpaired 1390-1392 MHz band (1.4 GHz band): (1) Fixed stations transmitting in the 1390-1392 MHz and 1432-1435 MHz bands are limited to 2000 watts EIRP peak power. Fixed stations transmitting in the 1392-1395 MHz band are limited to 100 watts EIRP peak power. (2) Mobile stations transmitting in the 1390-1392 MHz and 1432-1435 MHz bands are limited to 4 watts EIRP peak power. Mobile stations transmitting in the1392-1395 MHz band are limited to 1 watt EIRP peak power. (f) The following power limits apply to the 1670-1675 MHz band: (1) Fixed and base stations are limited to 2000 watts EIRP peak power. (2) Mobile stations are limited to 4 watts EIRP peak power. (g) The following power limits apply to the 2385-2390 MHz band: (1) Fixed and base stations are limited to 2000 watts EIRP peak power. (2) Mobile and aeronautical mobile stations are limited to 4 watts EIRP peak power. (h) Peak transmit power shall be measured over any interval of continuous transmission using instrumentation calibrated in terms of 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, etc., so as to obtain a true peak measurement for the emission in question over the full bandwidth of the channel. Table 1--Permissible Power and Antenna Heights for Base and Fixed Stations in the 698-764 MHz and 777-792 MHz Bands ------------------------------------------------------------------------ Effective radiated Antenna height (AAT) in meters (feet) power (ERP) (watts) ------------------------------------------------------------------------ Above 1372 (4500)............................................ 65 Above 1220 (4000) To 1372 (4500)............................. 70 Above 1067 (3500) To 1220 (4000)............................. 75 Above 915 (3000) To 1067 (4000).............................. 100 Above 763 (2500) To 915 (3000)............................... 140 Above 610 (2000) To 763 (2500)............................... 200 Above 458 (1500) To 610 (2000)............................... 350 Above 305 (1000) To 458 (1500)............................... 600 Up to 305 (1000)............................................. 1000 ------------------------------------------------------------------------ [62 FR 16497, Apr. 7, 1997, as amended at 65 FR 3147, Jan. 20, 2000; 65 FR 17602, Apr. 4, 2000; 65 FR 42882, July 12, 2000; 65 FR 57267, Sept. 21, 2000; 67 FR 5511, Feb. 6, 2002; 67 FR 41855, June 20, 2002; 69 FR 5715, Feb. 6, 2004]