[smoggy7]

hi all i am a newbie here, i have installed 3 cctvcameras to my nestboxes in the avairy breeding room , the wires are 48ft from the tv which is in my kitchen, the connections are red - power to camera ,yellow -video and white for sound on both ends of the cable so i bought a splitter for the 3 to be connected which as 3 switches for me to choose which camera i want to watch , after connecting the yellow and white to the tv the picture is brilliant but i am getting a band of white lines about an inch wide running down the tv screen can anyone tell me why i am getting this plz? i have tried each camera without the splitter but still getting it? many thanks smoogy

[avandmore]

This is a power supply unit issue, are all three cameras served by the same power supply adapter?

[S2Tigger]

I too think it may be a power supply issue, I installed 5 cameras at work, all power supplies were installed next to the DVR. Over the long cable runs, the video signal was very poor. I was able to put the power supply locally to the camera and the problem was solved. Wish people would let you know about these things when buying long cables with video, sound and power...

Darren

[jizzah]

Are you using 12v cameras. Over this distance the voltage may drop and there may also be interference. Use a local power supply and make sure your connections are clean. Use a test local power supply or a local test monitor to diagnose.

[bigbri1212]

You are getting Ground loop interference and the easiest way to get rid of it would be to fit a ground loop isolator in line with one or possibly all of your cameras. These things are relatively cheap (£10 ish) and are usually available from anywhere that supplies CCTV kit.
See Ground Loop Isolator for a bit more info