Site Feedback

Title 47

Displaying title 47, up to date as of 9/20/2021. Title 47 was last amended 9/20/2021.

Title 47

eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

§ 90.635 Limitations on power and antenna height.

(a) The effective radiated power and antenna height for base stations may not exceed 1 kilowatt (30 dBw) and 304 m. (1,000 ft.) above average terrain (AAT), respectively, or the equivalent thereof as determined from the Table. These are maximum values, and applicants will be required to justify power levels and antenna heights requested.

(b) The maximum output power of the transmitter for mobile stations is 100 watts (20 dBw).

Table - Equivalent Power and Antenna Heights for Base Stations in the 851-869 MHz and 935-940 MHz Bands Which Have a Requirement for a 32 km (20 mi) Service Area Radius

Antenna height (ATT) meters (feet) Effective radiated power (watts)1 2 4
Above 1,372 (4,500) 65
Above 1,220 (4,000) to 1,372 (4,500) 70
Above 1,067 (3,500) to 1,220 (4,000) 75
Above 915 (3,000) to 1,067 (3,500) 100
Above 763 (2,500) to 915 (3,000) 140
Above 610 (2,000) to 763 (2,500) 200
Above 458 (1,500) to 610 (2,000) 350
Above 305 (1,000) to 458 (1,500) 600
Up to 305 (1,000) 3 1,000

[70 FR 61062, Oct. 20, 2005]