Ask the professional to answer, monitor the camera with water ripples
There is a woody jam on the monitor. The presence of this kind of interference does not overwhelm the normal image at a slight time, and the image can not be viewed in a serious way (even breaking the sync). This kind of fault phenomenon is more complicated and complicated.
To distinguish between power problems and ground loop problems, an easy way is to control the host, the nearest access to a power supply without a problem camera output signal, if the monitor does not appear on the interference phenomenon , Then the control host no problem. Next, you can use a portable monitor near the video output of the front-end camera, and check each camera one by one. If so, then processed. If no, the interference is caused by ground loops and other reasons.
The most common symptom in video transmission is the presence of a black bar or a white bar on the monitor's screen and scrolling up or downwards. Therefore, in the analysis of such failure phenomenon, to distinguish between the two different causes of failure.
