{"data":{"id":"us/47-cfr-74.663","jurisdiction":"us","citation":"47 CFR 74.663","heading":"Modulation limits.","body":"If amplitude modulation is employed, negative modulation peaks shall not exceed 100%.","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 F—Television Broadcast Auxiliary 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":"12441cd0634b1a36aefef512bc731434020013c78ce1f8b063c38f7459978d9a","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-74.662","next":"us/47-cfr-74.682"},"notice":"GroundRules: Original legal text. Not legal advice."}