BNC connector(English: Bayonet Neill-Concelman, literally translated as "Neil-conseman Bayonet") is a very common RF coaxial connector. The BNC connector is used for the transmission of radio frequency signals, including the transmission of analog or digital video signals, the connection of antennas of amateur radio equipment, and the connection of aviation electronic equipment and other electronic testing equipment. In the field of consumer electronics, BNC connectors used for video signal transmission have been replaced by RCA terminals. Through a simple adaptor, RCA terminals can be used on devices with only BNC connectors. Mainly used in antenna, wire cable, automobile, radio, video, broadcast, telecommunication, satellite communication, monitor, radio, base station, medical equipment, detection equipment, closed circuit television, television, HD TV and other fields.