The interference of elevator wireless video surveillance equipment signals mainly includes:
1. The power supply interferes with the 380 volt power supply, and the elevator uses a variable frequency motor, which affects the camera and the transmission line.
2. The frequency conversion motor interferes with signals of 0-6 megahertz, and the frequency of interference generated by the frequency conversion motor is between 0 and 1 megabytes, causing direct interference to the video signal.
3, the controller of the video signal interference is about 11 trillion controller, once it starts, it will continue to send control signals and 11 trillion control wave, the control signal will produce interference on the video accompanying cable;
4, electric fan and light interference on the video signal 50hz and derived a variety of frequency interference, the interference will interfere with the video image;
5, distance 75-5 cable transmission distance should be about 167 meters, and the transmission distance of the scene reached more than 600 meters, so that the intensity of the video signal is greatly reduced, so that the interference signal on the video signal to produce a strong interference.
1. The power supply interferes with the 380 volt power supply, and the elevator uses a variable frequency motor, which affects the camera and the transmission line.
2. The frequency conversion motor interferes with signals of 0-6 megahertz, and the frequency of interference generated by the frequency conversion motor is between 0 and 1 megabytes, causing direct interference to the video signal.
3, the controller of the video signal interference is about 11 trillion controller, once it starts, it will continue to send control signals and 11 trillion control wave, the control signal will produce interference on the video accompanying cable;
4, electric fan and light interference on the video signal 50hz and derived a variety of frequency interference, the interference will interfere with the video image;
5, distance 75-5 cable transmission distance should be about 167 meters, and the transmission distance of the scene reached more than 600 meters, so that the intensity of the video signal is greatly reduced, so that the interference signal on the video signal to produce a strong interference.
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