With the increasing awareness of security and the rapid development of the security industry today, the application of television monitoring systems is becoming more and more extensive. More and more video images are disturbed during construction. There are several main reasons for the occurrence of various video image interference phenomena.
First, more and more electrical equipment is used now, resulting in an increasingly complex electromagnetic environment in which the monitoring system is located, and the probability of video images being interfered has increased;
The second is that the monitoring system is widely used, the number is large and the application is wide, and the phenomenon of interference is increasing;
Third, due to the different requirements for monitoring systems, many monitoring systems that have too much consideration of project cost have not taken the necessary measures to prevent video image interference or the equipment and wires used have poor interference resistance.
With the development of video anti-interference technology, all kinds of video interference caused by the transmission of video signals through coaxial cables can basically be solved. Since there are many reasons for video image interference, video anti-interference products also appear in many forms, but the most widely used is the anti-jammer using frequency shift technology, which can solve most of the video image interference. This kind of anti-jamming device is actually the most basic application of video multiplexing technology.
