cutsgems

Been out of the video world for a while. Setting up a 9 channel American Dynamics DVR with AD Cameras and a 24VAC supply. Do the DVR's compensate for vertical sync timing differences if I set my cams for internal sync or do I need to set my camera DIP switches for Line Lock and time the cameras using an o-scope. with the 24VAC? If I time the cameras, can I set them on the bench & ignore the propagation delay of the cable, single runs are less than 100 ft. Advice appreciated, TIA