Coaxial cable connectors are classified as BNC, N-type, F-type, and SMA. BNC is used for quick locking CCTV, F-type is used for TV and cable connections, and N-type is used for high power RF. Each of these types has distinctive impedance, 50Ω or 75Ω as well as frequency range; SMA receiving up to 18GHz. Choosing the right type of connector maintains low-loss connections essential to signal integrity in many communications systems, which is vital to signal quality.