fullhouse 0 Posted December 13, 2012 Hello, Have a 4 channel DVR wich we have installed in more situations. Have several analog 600 tvl cameras which also have installed more.. Now the problem. The pictures are very good at daytime. No problem at all. But when it gets darker the IR lights switch on , the pictures are slowly going from full color to nightvision Black and White Than it happens .. pictures are no longe visible. Just blurry and black and white? Problem is not all cameras are doing this? But all cameras that are mounted are the same? When daylight is coming again all is ok.?? Strange thing is on my tester all is ok? System is build with UTP cable max lenghts 25 - 35 meters with Video balun Video power is 12 volt constant Video level was however 1.3 volts What we tryed so far: Change the baluns : no effect Brought the video level/amplitude back to 500 mV ( on my tester picture still all ok) No effect Power measured 12 volts ok amps is also ok So if there is anybody who knows this problem and maybe has some tip how to deal with this.. Thanks!\ Greetings from The Netherlands Rick Share this post Link to post Share on other sites
aibudo 0 Posted December 13, 2012 Don't have an answer at this point, but have you tried bypassing the power and video cable for your test? In other words, did you supply 12V directly at the camera with a 12VDC power supply and connect a monitor directly to the video cable at the camera? Not sure what I'm expecting, but,,,,,,,, Dennis Share this post Link to post Share on other sites
fullhouse 0 Posted December 13, 2012 Hi Dennis, Thanks for the reply. Yes already tried this No change.. Rick Share this post Link to post Share on other sites
aibudo 0 Posted December 13, 2012 How many LED's for night vision? What is the make and model of the camera's? There must be an issue with them. Dennis Share this post Link to post Share on other sites
joseph.chen0312 0 Posted December 21, 2012 Hello Rick, As you mentioned, but which type of camera, IR Dome or IR bullet? I think first off is you could see does glass of front case is clean or blurry if it clean remove front case to check surface of lens does clean if above one or both is foggy please clean up then try it may be works. Share this post Link to post Share on other sites
aibudo 0 Posted December 22, 2012 Curious Rick, what did you find out? Dennis Share this post Link to post Share on other sites
