Elevator video monitoring cable manufacturers tell you that in elevator monitoring wiring, most of them are bundled with other cables, but because the AC signals in other cables will leak out through the transmission cable, when the video cable is bundled in parallel with its long distance, they are equal to one. Sub-antenna, so that the interference signal will be coupled into the video signal, causing video interference phenomenon. Therefore, in the wiring, try to shorten the parallel bundling length of the video cable and other cables. The Elevator video monitoring cable manufacturer tells you that if conditions permit, you can fix the video cable from the middle point of the elevator shaft and lead it back to the main control room from other channels (cable shaft). This can avoid the coupling interference of ac-acoustic radiation.

The Elevator video monitoring cable manufacturer tells you that AC frequency conversion speed regulation technology is basically used in elevators, and the frequency conversion speed controller itself has strong high-frequency parasitic interference. According to the measured results, the radiation bandwidth of the frequency conversion speed controller is 0~10 MHz , And the interference signal amplitude is very strong. The 0~6 MHz video baseband signal is just in this frequency band. Interference signals can invade the video signal from the power line and space, and affect the image monitoring effect. This is the main cause of elevator interference and the most difficult interference problem to solve.
The Elevator video monitoring cable manufacturer tells you that in elevator monitoring, the camera power supply is best to be directly supplied by DC from the main control room. If the power supply cannot be directly supplied, you can choose to take the power from the lighting power supply in the elevator car. However, most elevator manufacturers currently use elevator interior lighting. They are all fluorescent lamps. The manufacturer of Elevator video monitoring cable tells you that this kind of lamps also use electronic ballasts. When electronic ballasts are working, they will also produce strong AC parasitic interference output, which may also interfere with video signals.
The Elevator video monitoring cable manufacturer tells you the main causes of elevator video interference. The above detailed analysis has been carried out. Only by finding the cause of the interference, the interference problem can be solved. Solving elevator interference should mainly start with the following points.
1. The Elevator video monitoring cable manufacturer tells you to choose a video cable with a small attenuation coefficient, good shielding performance, and high tensile strength, which can improve its own anti-interference ability, reduce video attenuation, and prevent interference signals from "invading" from the video cable shielding layer. "interference.
2. Reasonable wiring: The Elevator video monitoring cable manufacturer tells you that the reasonable wiring department effectively avoids the interference signal from being "coupled" through the cable, minimizes the parallel bundling distance with other cables, and keeps the video cable away from the interference source to "avoid" interference.
3. The Elevator video monitoring cable manufacturer tells you to use a clean power supply to prevent power interference. It is best to use a centralized power supply in the computer room to avoid power interference. The interference from the power supply into the video signal is also the most difficult interference problem to solve. The Elevator video monitoring cable manufacturer tells you that if you cannot determine where the interference signal is introduced into the system, first determine whether it is power interference, find a battery, and directly supply power to the camera. If the interference is eliminated, it will prove to be power interference. Intrusion interference in the cable.