Video interference problem
Posted: Mon Jun 29, 2020 11:10 am
A dome camera is installed on either side of a transformer room in a factory. There is large interference of high voltage, frequency conversion motor and other equipment in the transformer room. Almost no video signal is sent. 24V AC power is supplied and the distance is about 150m between monitor room to monitor spot. How to remove the interference?
The video expander can be used on the two transmission lines. But if use one line only, it is ok for the used one. If use on both lines, there is interference between the two video expanders.
Video expander converts low frequency signals into high frequency signals to avoid frequency interference in the same frequency band. If you put the two video expander lines together, you have two sets of high-frequency signals together, and they interfere with each other. So, should not put the lines of the video expander next to each other.
The solution is draw a video line of 5-10 meters from the monitoring room and place separately.
The video expander can be used on the two transmission lines. But if use one line only, it is ok for the used one. If use on both lines, there is interference between the two video expanders.
Video expander converts low frequency signals into high frequency signals to avoid frequency interference in the same frequency band. If you put the two video expander lines together, you have two sets of high-frequency signals together, and they interfere with each other. So, should not put the lines of the video expander next to each other.
The solution is draw a video line of 5-10 meters from the monitoring room and place separately.