Hi, my name is Adrian and I am new to CCtv systems but I have a problem and hope that someone out there can help me. A year ago I bought a DVR 8 channel which I think it is 420 TVL, I recently bought two new cameras which are 480 TVL. when I installed these cameras the picture on the DVR monitor (only on the respective channels of these cameras, the older camera channel are ok) keep on scrolling downwards. I do not have lines running along the picture (as I read some reviews) it is the whole picture that is going downwards it is like a slideshow. (I hope I made my self understandable ). My questions is, does the difference in TVL between the DVR and the camera has anything to do with this phenomena or the source of my problem is coming from something else. If yes what can I do in order to fix it (apart from buying other cameras with same TVL) and if no can some help me out please!
Thank you all
