Coaxial modem

BWT developed coaxial modems also known as decoder "C" modules. Can be used with all BWT decoder and control system equipment, or can be used independently.

Coaxial modem is for the transmission of video signals with coaxial cable without wiring can be passed through the modem all other signals (all kinds of control signals, alarm signals, feedback information signals, etc.) after modulation in the same coaxial cable transmission.

Modems are classified as CTYPE A and Ctype B. Modulation and demodulation at the control side and the decoder side, respectively.

The principle of the modem is: avoid the transmission frequency band of the original video signal, and select the 11.5MHz frequency band other than the video signal (6.5MHz) to control and alarm, feedback signal modulation transmission, and demodulation processing at the terminal. The normal transmission of the original video signal is not affected at all. No interference to the video signal.

Other technical parameters and features:

◆ Double BNC plug for output and input, convenient for direct connection

◆ Can be directly installed on the BWT decoder board (with corresponding installation screw hole and plug), can also be installed in the BWT through the shell (inside the box)

◆ RS485 and RS422 interface

◆ 5VDV power supply, 15mA