BangersAndMash

Hi, OK. Well, I have a single camera fed into a 4 channel DVR. The camera attached to the DVR by a 20m signal/power cable with BNC connectors. One of these: http://www.amazon.co.uk/gp/product/B004I9N5RO/ref=s9_simh_gw_p60_d4_g23_i2?pf_rd_m=A3P5ROKL5A1OLE&pf_rd_s=center-2&pf_rd_r=0T9AHTQVW5KY3927S49R&pf_rd_t=101&pf_rd_p=467128533&pf_rd_i=468294 this is the DVR: http://www.ebay.co.uk/itm/ws/eBayISAPI.dll?ViewItem&item=230697982868&ssPageName=ADME:L:OU:GB:1123 The picture is heavy with interference, so much so I think it actually trips the motion detector alarm in the DVR. The interference looks like faint vertical lines being badly distorted left and right, like a hairpin in a road. I have tried to plug the camera and DVR into separate power outlets and then on the same outlet and I've checked all the connectors, but no luck. I have also tried a ground loop isolator but that made the problem ten times worse. Is it because the signal/power cable is unshielded? I've read that power and signal cable should not run along side each other and 20m is a long way to run both power and signal side by side. Any ideas?

Hi, just joined and wondered if you could tell me which forum would be most suitable for discussing this problem I have? Thanks.