Closed Circuit Television Systems

Closed circuit television systems (CCTV) are used for area surveillance and remote monitoring. Some closed circuit television systems can record events and trigger alarms. Closed circuit TV is different from broadcast television in that all of CCTV's components are linked through cables or other direct means. In a CCTV system, live or prerecorded signals are sent to a predetermined group of receivers over a closed loop, either through coaxial cable or as scrambled radio waves. The scrambled radio waves are then unscrambled at the point of reception. Closed circuit television can be used to make a business more secure and less prone to theft. Basic closed circuit TV (CCTV) consists of a single camera directly connected to a monitor and recorder. More complex CCTV systems may consist of hundreds of cameras, multiple operators, and digital recorders.