{"data":{"id":"us/47-cfr-90.771","jurisdiction":"us","citation":"47 CFR 90.771","heading":"Field strength limits.","body":"(a) The transmissions from base stations, or fixed stations transmitting on base station transmit frequencies, of EA and Regional licensees may not exceed a predicted 38 dBu field strength at their EA or REAG border. The predicted 38 dBu field strength is calculated using the F(50,50) field strength chart for Channels 7-13 in § 73.699 (Fig. 10) of this chapter, with a 9 dB correction factor for antenna height differential.\n(b) Licensees will be permitted to exceed the predicted 38 dBu field strength required in paragraph (a) of this section if all affected, co-channel EA and Regional licensees agree to the higher field strength.\n(c) EA and Regional licensees must coordinate to minimize interference at or near their EA and REAG borders, and must cooperate to resolve any instances of interference in accordance with the provisions of § 90.173(b).","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES","PART 90—PRIVATE LAND MOBILE RADIO SERVICES","Subpart T—Regulations Governing Licensing and Use of Frequencies in the 220-222 MHz Band"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-47.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:28Z","sha256":"899b2706e27a21c599672119c800298b8b440443ea1747c3ae0a66a6f50e7316","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-90.769","next":"us/47-cfr-90.901"},"notice":"GroundRules: Original legal text. Not legal advice."}