System composition: Camera, Transmission, Control, Display and Record. System functions:
Camera: It is installed on site, it includes camera, lens, protective cover, bracket and electric pan, its task is to take a picture of the subject and convert it into electrical signal.
Transmission: Its task is to transmit the electrical signal sent by the on-site camera to the control center, which generally includes cables, modulation and demodulation equipment, line driving equipment, etc.
Display and Record: It convert the electrical signals from site into images and display them on monitoring equipment, if necessary, record them with a video recorder, main equipment contains a monitor and a video recorder.
Control: It is responsible for the control of all equipment and the processing image signals.
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