essexlee

Hello, I installed a 4 channel zeus qvis nvr and 4 IP 3MP cameras. the last camera I plugged in started skipping, if someone walked past they jumped across the screen. I swapped it with another camera that was fine so see if it was the camera, now both cameras are doing the same thing. the seconds go a bit strange, they go fast n slow. I tried bringing the resolution down but that makes no difference. Any clues anyone? Thanks