Bsw

Hi all, I've got a problem and was hoping to pick your brains. I resently installed a new cctv system. Which consits of a DVR and four cameras(2x basic,2x with audio), everything was working great until i tested the audio. Theres a loud .....buzzing/static sound. The mics seem to work, I can still hear people talking etc, just has the buzzing over the top. So i went around checking everything, all the connections,cables,etc there all fine. Next i looked around for somthing that could be creating interference . Near one of the cameras (about 3 meters away) theres a fridge. Ok so that could cause it for the first cam but the second theres nothing and I mean nothing. This has got me pretty stumped. If it was one cam i'd say its faulty and get a replacement,but two.. The DVR has four audio inputs i've tryed all of them. no change. The buzzing is there when Live & Playback(both TV screen and networked to a computer). The only thing i can think it might be is a bad DVR, but i rather not send it back and get a replacement since that could take a while and I need these cams to stay open(by law). Is there a know problem with Xvision VIS200D cams? Any help would be great.

Hmm, good idea. I'll try setting up a TV near one of the cameras. Well Thanks for all the help, I'll go around testing as much as I can, If I find out what's causing it I'll let you know. If not I guess its two new cameras.

Sorry for taking so long to reply, been really busy. Thanks for helping. I know nothing compared to what you guy do. But I'm a quick learner OK. My setup is really simple but it does the job. well apart from the audio. The site i got the equipment off is www y3k com (I'm a new user so no URLs) DVR: Xvision H4DVR www y3k com/section.php?xSec=59&jssCart=434b3c7c358db164c66449b59a750d5b " 4 Camera (4 Audio) Real Time H264 Pentaplex " Cameras i'm having the problem with: Xvision VIS200D www y3k com/section.php?xSec=5&jssCart=434b3c7c358db164c66449b59a750d5b X 2 Second down, there sites just been updated and is messing around, so i can't link to it own page. The cables are the ones that came with it, that includes the power. There 40m composite cables.(Yellow = video, White = audio, Red = power) The cameras and DVR need adapters to convert the video cable to co-axial. The audio doesn't need adapters.(composite all the way though) Power is whatever came with it. not sure if its AC or DC, will have to check tomorrow. All together i have 4 cameras connected, the two that work perfectly are 1x basic Dome(No audio),1x Night Vision Bullet Cam(No audio).Can link if you need it. I was hoping that keeping it simple and all "pre made" would avoid any problems. I was wrong instead it's created a system that seems hard to debug. I'm moving the whole system around tomorrow so I'll check everything again. Anything I need to keep a look out for?