PaulsonLaw 0 Posted January 11, 2012 (edited) Hey all.. Half way in, I have a yellow RCA cord from the bnc video out on the dvr to the tv. Works great, until I plug the cable coax onto the tv, then the cams input is all out-of-wack! Take off the cables coax & all is fine again???? Tried on 2 analog tv's, ANYTHING!?!?!?!?! Thanks in advance! ***** FIXED ***** So after trying cables and all else, decided to check tv cable ground @ splitter, there was none, nor was there any on the whole system! Added a quick ground, problem solved! Thanks All! Edited January 12, 2012 by Guest Share this post Link to post Share on other sites
tomcctv 190 Posted January 11, 2012 hi are you using AV or scart socket ? Share this post Link to post Share on other sites
SEANHAWG 1 Posted January 11, 2012 Dont use the TV's coax input. Use the TV's rca input. If you want to use the coax input, you have to use a modulator which turns your dvr into a tv channel Share this post Link to post Share on other sites
PaulsonLaw 0 Posted January 11, 2012 This goes... From the dvr BNC video out to a A/V RCA cord, then to the side input of the tv. Then when I hook up the cable to it's coax input, the dvr signal becomes all jacked... Share this post Link to post Share on other sites
SEANHAWG 1 Posted January 11, 2012 I guess I want to know why you are hooking the DVR up to the Coax input on the TV if you got it working just fine on the RCA input? Why not just leave it in the RCA input Then when I hook up the cable to it's coax input, the dvr signal becomes all jacked... Yes that is correct, If you want to connect it to the TV's coax input. You have to get a Modulator. You cannot hook it straight into the Coax input. You have to put a modulator between the DVR and the TV's Coax input. Share this post Link to post Share on other sites
PaulsonLaw 0 Posted January 11, 2012 No, sry... When the dvr out is hooked up the the A/V side input & I connect the cable coax to the coax connection, the dvr signal goes nuts.... So this is when both are hooked up. Not running the dvr to the coax.... Thanks Share this post Link to post Share on other sites
tomcctv 190 Posted January 11, 2012 sorry i am also confused. i understand you have your dvr into the AV of your tv but what is this coax connection ..... is it you tv signal ???? Share this post Link to post Share on other sites
PaulsonLaw 0 Posted January 11, 2012 sorry i am also confused. i understand you have your dvr into the AV of your tv but what is this coax connection ..... is it you tv signal ???? ah yes, sry, the cable coax is the tv signal.... Share this post Link to post Share on other sites
tomcctv 190 Posted January 11, 2012 it may well be a bad cable from your dvr. do you have another tv you can test with ?? the other thing to look at is on your tv menu see how your AV is set (some TVs have a source setting) but either your cctv cable or the coax has a short (check the connection on your tv coax) Share this post Link to post Share on other sites
SEANHAWG 1 Posted January 11, 2012 Oh okay, I see. Well that is wierd. Your RCA cable must be getting some interference from the Coax whenever it is plugged in. Does your DVR not have an HDMI or VGA output instead that you can output to, those usually have better picture quality anyways. Share this post Link to post Share on other sites
PaulsonLaw 0 Posted January 12, 2012 No HDMI or VGA up at the house, both 5 years old.... I tried this on 2 tv's, exact same problem.... Share this post Link to post Share on other sites
SEANHAWG 1 Posted January 12, 2012 Perhaps what Tom said, your RCA cable may be bad, I dont know? That is unusual. You may try getting a new cable, they are cheap. Run to Radio Shack and get an RCA cable and ask them for an RCA female to BNC male adapter. Or updgrade the DVR Share this post Link to post Share on other sites
PaulsonLaw 0 Posted January 12, 2012 Thanks, have a bnc adapter from RS, will try a new cord in the morning... Thanks, will post the results Share this post Link to post Share on other sites
Soundy 1 Posted January 12, 2012 If everything is fine until you connect the CATV, then I'd say the problem is in the CATV line, most likely a bad ground somewhere. When a friend of mine got her first cable modem, one of the big old space-heater types, it worked great... when she got upgraded by the cable company, her internet didn't work anymore. It took several visits by numerous technicians (most of them fresh out of electronics grad school), all of them testing the line with their fancy testers and finding good signal, everything reading fine... finally one of the old-timers came out and checked things... found the grounding block for the incoming line wasn't properly grounded, and there was a 120V, 60Hz signal on the line, acting almost like a "carrier" and messing up the new modem (the old modem, he figured, had more robust filtering and so wasn't affected by the extraneous signal). He connected the block to a new, solid earth ground, and the problem went away. I'd tend to suspect you're seeing some sort of grounding issue or a stray current in the CATV line as well... maybe not the SAME problem, but something similar going on. Share this post Link to post Share on other sites
