1.There is a strong source of interference near the system.
2. The quality of the video transmission line is not good, and the shielding performance is poor.
3. Failure caused by the power supply of the power supply system.
4. Failure caused by the characteristic impedance mismatch of the transmission line.
5. Faults caused by short circuit or open circuit between the core wire of the video cable and the shielding net. Failure caused by the power supply of the power supply system.
6. The transmission line introduces spatial interference.
Solutions to signal interference
1. The power supply problem of the power supply system. There are interference signals superimposed on the normal power supply. In this case, as long as the entire system of the LCD splicing screen adopts a clean power supply or an online UPS power supply, it can basically be solved.
2. The interference source near the system is too strong. Ground the pipe of the video cable.
3. The core wire of the video cable is short-circuited or short-circuited. When this kind of malfunction occurs, the LCD splicing wall often does not have problems with all the signals of the entire system, but only on the number of poor connectors. As long as you carefully check these connectors one by one, you can solve it.
4. Failure caused by the characteristic impedance mismatch of the transmission line. This phenomenon is caused by the fact that the characteristic impedance and distribution parameters of the video cable of the LCD splicing wall system do not meet the requirements. This situation can be solved by the method of "starting end series resistance" or "terminal parallel resistance". .
5. The transmission line introduces spatial interference. The solution to this situation is to understand the surrounding environment when the system is established, and try to avoid or stay away from the radiation source as much as possible. When the radiation source cannot be avoided, strengthen the shielding of the front and center equipment, and use steel pipes for the transmission line and well grounded.
6. The quality of the video transmission line. The line resistance of this kind of video line is too large, which causes a large attenuation of the signal, which is also the cause of aggravated failure.
