Faced with the general monitoring requirements, best 75-5 coaxial cable transmission distance of about 300 meters, when the need to meet more long-distance transmission, we need to increase the video amplifier to prevent signal attenuation. Coaxial video cable video signal transmission, high-frequency attenuation portion faster; amplifier-correction, adding a cable compensator allows the transmission line to extend 500m.
As traditional analog and digital high-definition monitor to monitor the transmission medium, coaxial cable transmission has the following four characteristics:
First, the wiring simple. The system can be implemented in practical applications 40 channel monitoring signal through a coaxial cable two-way transmission. Data transmission, including both video information, including audio and control signal information.
Second, a large frequency bandwidth. And network monitoring is different, coaxial cable frequency bandwidth of 0 ~ 1000MHz, its large bandwidth monitoring data uses only some of the bandwidth resources, as well as alarm and other information transmission space left.