- Sep 18, 2017 -
The interference source of the elevator video is mainly: the elevator of the elevator is more serious than the DC type; the elevator is more disturbed than the straight line when the elevator is running at the start and the acceleration process, the integral type (other) The use of inverter speed elevator radiation out of the high-frequency interference than the SCR, line / phase voltage variable speed; process specifications of the elevator radiation interference is small. To solve the elevator interference should start from the following points.
1) select the attenuation coefficient is small, good shielding performance, high tensile strength of the video cable, which can improve their anti-interference ability to reduce the video attenuation, to prevent interference from the video cable shielding "intrusion" interference.
2) Reasonable wiring: Reasonable wiring section effectively avoid interference signal through the cable "coupled" together, to minimize the parallel bundling distance with other cables, so that the video cable away from the interference source, so as to "avoid" interference.
3) the use of clean power to prevent power interference, the best use of the room centralized power supply, to avoid power interference, from the power into the video signal interference is the most difficult to solve the interference problem. If you can not determine where the interference signal from the introduction of the system, first determine whether the power supply interference, find a battery, directly to the camera power supply, if the interference is proved to be power interference, can not be ruled out that the transmission cable is intrusion interference.