Cables are very important part of a CCTV system, it carry the video signal from camera to the dvr/nvr. Coaxial cable is used in HD CCTV system. Coaxial cable is a type of transmission line, used to carry high-frequency electrical signals with low losses. It is used in such applications as CCTV, telephone trunk lines, broadband internet networking cables, high-speed computer data buses, cable television signals, and connecting radio transmitters and receivers to their antennas. It differs from other shielded cables because the dimensions of the cable and connectors are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a transmission line.
Twisted pair cables are used in IP surveillance system,
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