WDEF–TV, channel 12, is the CBS affiliate television station for Chattanooga and the Tennessee Valley. The station, whose cal ... l letters came from its former AM and FM sister stations, is owned by Morris Multimedia. Its studios are located on Broad Street in Chattanooga, while its transmitter is located in nearby Signal Mountain. On cable, WDEF-TV is carried on Comcast channel 13, and on EPB Fiber Optics channels 12 and 312 in the Chattanooga area. Syndicated programming on WDEF includes: Judge Judy, The Insider, and The Andy Griffith Show. read more