What are the functions of security decoder, the main function and principle?
PTZ decoder is to control the camera lens and pan tilt and other functions of digital signals into electrical signals can be controlled by the equipment, the use of a wide range. Typically, it has several aliases: pan head decoders, cloud mirror decoders (pan head, lens decoder).
The device that controls these actions is called a cloud mirror controller, also called a decoder. Coupled with the control keyboard control device can control the servo device more, with the monitor consists of a simple monitoring system. With the development of. Decoder can be placed inside the pan (built-in decoder), and control equipment interface is generally RS-485, the commonly used communication protocols are: PELCO-D, PELCO-P, AD/AB, YAAN and so on.
The pan head decoder refers to a pan head and a lens controller. Generally, the lens (camera) is mounted on the pan head, and the pan head can rotate up, down, left and right. The lens can zoom in and out (zoom), focus, change the aperture size and so on.
