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Tp23

Ground loop Inteference

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Hi all new to this forum I installed a four camera hikvision 5mp system yesterday using cat 5 duct grade 5mp baluns 5a 12v supply with flying leads. 3 out of 4 cameras are good but when I connect the video into the fourth it effects all the other cameras, basically kicks them out and each one comes back and goes and so fourth. I have tested the cable no shorts between any of the cores would this more than likely be a ground loop problem? 

Any response would be much appreciated 

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Yes it may be. These are analog I assume?

I had a similar problem using Pelco BU6 series cameras. The only solution I found was to use a separate AC Adapter for the camera that was having problem.

You can try ground isolation transformers but that did not work for me, 

 

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