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Code of Federal Regulations Title 47. Telecommunication § 47.90.729 Limitations on power and antenna height

Current as of October 02, 2022 | Updated by FindLaw Staff

(a) The permissible effective radiated power (ERP) with respect to antenna heights for land mobile, paging, or fixed stations transmitting on frequencies in the 220–221 MHz band shall be determined from the following Table. These are maximum values and applicants are required to justify power levels requested.

ERP vs. Antenna Height Table 2

Antenna height above average terrain (HAAT), meters

Effective radiated power, watts 1

Up to 150

500

150 to 225

250

225 to 300

125

300 to 450

60

450 to 600

30

600 to 750

20

750 to 900

15

900 to 1050

10

Above 1050

5

1 Transmitter PEP shall be used to determine ERP.

2 These power levels apply to stations used for land mobile, paging, and fixed operations.

(b) The maximum permissible ERP for mobile units is 50 watts. Portable units are considered as mobile units. Licensees operating fixed stations or paging base stations transmitting on frequencies in the 221–222 MHz band may not operate such fixed stations or paging base stations at power levels greater than 50 watts ERP, and may not transmit from antennas that are higher than 7 meters above average terrain, except that transmissions from antennas that are higher than 7 meters above average terrain will be permitted if the effective radiated power of such transmissions is reduced below 50 watts ERP by 20 log10(h/7) dB, where h is the height above average terrain (HAAT), in meters.

(c) Base station and fixed station transmissions on base station transmit Channels 196–200 are limited to 2 watts ERP and a maximum antenna HAAT of 6.1 meters (20 ft). Licensees authorized on these channels may operate at power levels above 2 watts ERP or with a maximum antenna HAAT greater than 6.1 meters (20 ft) if:

(1) They obtain the concurrence of all Phase I and Phase II licensees with base stations or fixed stations receiving on base station receive Channels 1–40 and located within 6 km of their base station or fixed station;  and

(2) Their base station or fixed station is not located in the United States/Mexico or United States/Canada border areas.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 47. Telecommunication § 47.90.729 Limitations on power and antenna height - last updated October 02, 2022 | https://codes.findlaw.com/cfr/title-47-telecommunication/cfr-sect-47-90-729/

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