Jimlyn 0 Posted July 15, 2005 A DVR manufacturer's tech support indicated to me that any DC voltage over .5 volts measured across the coax core and ground can cause problems with their DVR. The DVR reboots itself at willl. and acts erratically. Does anyone have knowledge of this and what to do to correct it? Thanks. Share this post Link to post Share on other sites
scottj 0 Posted July 15, 2005 I guess the real question is why are you getting .5 volts DC over your coax connection? What DVR is it, and what camer is attached? scottj Share this post Link to post Share on other sites
Jimlyn 0 Posted July 15, 2005 The DVR is a Tempest Microsystems and the cameras are mostly day night color bullet cameras. I don't know the manufacturer of the cameras as there is no marking on them. Can DC voltage be picked up in coax by running too close to 110 volt wires? Jimlyn Share this post Link to post Share on other sites
cctvron 0 Posted July 17, 2005 2 things Is the camera indoor or outdoor? PUT a Ditek I-BNC Surge Protector on the Coax. See if this helps with the surges. Share this post Link to post Share on other sites
raft 0 Posted July 17, 2005 Not clear how do you measure DC difference? (points?) What do you use as a ground? There is a chance you are getting a video ground loop. Try video ground loop isolators (SC&T) Share this post Link to post Share on other sites
