§90.309. Tables and figures. — Inbound Citations

(i) Power and height limitations are specified in §§ 90.307 and 90.309.

The tables and figures listed in § 90.309 shall be used to determine the effective radiated power (ERP) and antenna height of the proposed land mobile base station and the ERP for the associated control station (control station antenna height shall not exceed 31 meters (100 feet) above average terrain (AAT)).

(i) Except as specified in paragraph (c)(2)(ii) of this section, base stations shall be limited to a maximum effective radiated power (ERP) of 225 watts at an antenna height of 152.5 meters (500 feet) above average terrain (AAT). Adjustment of the permitted power will be allowed provided it is in accordance with the “169 kilometer Distance Separation” entries specified in Table B in 47 CFR 90.309(a) or the “LM/TV Separation 110 miles (177 km)” curve in Figure B in 47 CFR 90.309(b).

Except as otherwise specified in § 90.309(a)(4) of this chapter, average terrain elevation must be calculated by computer using elevations from a 30 second point or better topographic data file. The file must be identified. If a 30 second point data file is used, the elevation data must be processed for intermediate points using interpolation techniques; otherwise, the nearest point may be used. In cases of dispute, average terrain elevation determinations can also be done manually, if the results differ significantly from the computer derived averages.

(1) (According to § 90.309(a)(4).)

(2) Any one of such sites has an antenna height of less than 30.4 meters (100 feet) above ground level with an antenna height above average terrain (HAAT) of less than 152.4 meters (500 feet) and twenty or more paired frequencies.

900 MHz broadband. See 47 CFR 27.1501.

900 MHz broadband licensee. See 47 CFR 27.1501.

900 MHz narrowband segment. See 47 CFR 27.1501.

900 MHz SMR MTA-based license or MTA license. (1) A license authorizing the right to use a specified block of 900 MHz SMR spectrum within one of the 47 Major Trading Areas (“MTAs”), as embodied in Rand McNally's Trading Areas System MTA Diskette and geographically represented in the map contained in Rand McNally's Commercial Atlas & Marketing Guide (the “MTA Map”), with the following exceptions and additions:

(i) Except as specified in paragraph (c)(2)(ii) of this section, base stations shall be limited to a maximum effective radiated power (ERP) of 225 watts at an antenna height of 152.5 meters (500 feet) above average terrain (AAT). Adjustment of the permitted power will be allowed provided it is in accordance with the “169 kilometer Distance Separation” entries specified in Table B in 47 CFR 90.309(a) or the “LM/TV Separation 110 miles (177 km)” curve in Figure B in 47 CFR 90.309(b).