{"data":{"id":"us/47-cfr-74.1236","jurisdiction":"us","citation":"47 CFR 74.1236","heading":"Emission and bandwidth.","body":"(a) The license of a station authorized under this subpart allows the transmission of either F3 or other types of frequency modulation (see § 2.201 of this chapter) upon a showing of need, as long as the emission complies with the following:\n(1) For transmitter output powers no greater than 10 watts, paragraphs (b), (c), and (d) of this section apply.\n(2) For transmitter output powers greater than 10 watts, § 73.317 (a), (b), (c), and (d) apply.\n(b) Standard width FM channels will be assigned and the transmitting apparatus shall be operated so as to limit spurious emissions to the lowest practicable value. Any emissions including intermodulation products and radiofrequency harmonics which are not essential for the transmission of the desired aural information shall be considered to be spurious emissions.\n(c) The power of emissions appearing outside the assigned channel shall be attenuated below the total power of the emission as follows:\nDistance of emission from center frequency Minimum attenuation below unmodulated carrier\n120 to 240 kHz 25 dB\nOver 240 and up to 600 kHz 35 dB\nOver 600 kHz 60 dB\n(d) Greater attenuation than that specified in paragraph (c) of this section may be required if interference results outside the assigned channel.","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER C—BROADCAST RADIO SERVICES","PART 74—EXPERIMENTAL RADIO, AUXILIARY, SPECIAL BROADCAST AND OTHER PROGRAM DISTRIBUTIONAL SERVICES","Subpart L—FM Broadcast Translator Stations and FM Broadcast Booster Stations"],"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":"aca77e4605572319a9c90ca985fd9d1d7176f5112bab342eb7feea6840555073","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-74.1235","next":"us/47-cfr-74.1237"},"notice":"GroundRules: Original legal text. Not legal advice."}