47 C.F.R. § 74.791 Digital call signs.
Title 47 - Telecommunication
(a) Digital low power stations. Call signs for digital low power stations will be made up of a prefix consisting of the initial letter K or W followed by the channel number assigned to the station and two additional letters and a suffix consisting of the letters −D. (b) Digital television translator stations. Call signs for digital television translator stations will be made up of a prefix consisting of the initial letter K or W followed by the channel number assigned to the station and two additional letters and a suffix consisting of the letter −D. (c) Digital low power television stations and Class A television stations. Digital low power television and Class A television stations may be assigned a call sign with a four-letter prefix pursuant to §73.3550 of the Commission's rules. Digital low power stations with four-letter prefixes will be assigned the suffix −LD and digital Class A stations with four-letter prefixes will be assigned the suffix −CD. [69 FR 69335, Nov. 29, 2004]
Title 47: Telecommunication
PART 74—EXPERIMENTAL RADIO, AUXILIARY, SPECIAL BROADCAST AND OTHER PROGRAM DISTRIBUTIONAL SERVICES
Subpart G—Low Power TV, TV Translator, and TV Booster Stations
§ 74.791 Digital call signs.
