Coaxial cable interference problems can be divided into two types: real interference and false interference. False interference is usually caused by equipment failure or human factors, and can be resolved after equipment repair or replacement. True interference needs to be solved symptomatically according to different situations. How to distinguish between true and false interference?
1. The electromagnetic interference we often say generally refers to the interference caused by the receiving line of the cable receiving the electromagnetic wave signal from the outside to the normal internal transmission signal. According to the experiment, the video baseband transmission is (0~6M), and this kind of common electromagnetic interference can be solved only by the weighted anti-jamming device.
2. There are many factors that cause engineering interference, among which equipment failure is the main cause of engineering interference, such as camera failure, camera power failure, etc., can cause such interference, although this situation is often classified as interference, But strictly speaking, this situation should be called troubleshooting equipment failure. Disturbances at work can be resolved simply by troubleshooting the equipment. In addition, the multi-point grounding problem of the video system is also considered as a kind of interference phenomenon. This situation is caused by the construction personnel introducing “ground potential” into the video system, which can be solved by single-point grounding. These interferences caused by equipment operation errors or equipment failures are all false interferences.
3. Real interference can be avoided in various ways, such as by wearing galvanized iron pipes, or using optical cables, radio frequency lines, etc. In addition, anti-jamming devices can also be used to solve the problem. False interference is caused by subjective factors or human faults, and can only be solved by avoiding it as much as possible during construction, ensuring standardized construction, and improving equipment performance.
