stipan 0 Posted May 30, 2014 I have a cheap 8port DVR with 2 cameras already connected which are working perfectly and are being recorded. I've decided to connect an existing 3rd camera which is used for delivering a picture to the local CATV network on a single channel, but was not being recorded... so I got a BNC t-splitter and connected one end of the 3rd camera to the old RF modulator and the other one to the DVR for recording. The RF modulator is two floors above, and it's connected to the 3rd camera below through some weird thin coax cable. I have not installed this RF modulator, it was there before we got a DVR and started toying with more CCTV in our building. Here's how the RF modulator looks like: http://i.imgur.com/NbWnhBL.jpg Keep in mind: -Power supply has been checked and is good... have tried a different one -The camera is good, even though I've tried another one -If I disconnect the RF modulator line from the BNC splitter, everything works great and there is no interference -If both the DVR and RF modulator are connected, there is a bit more interference on the RF modulator, but the picture on the DVR goes mad, as you can see on the video... Here's the video: http://videobam.com/tTkIn (if the above doesn't work, try this link: https://vidd.me/vAc ) Here's a quick schematic of how things are connected: http://i.imgur.com/NAQOKyu.png So, what could it be? I'm doing this voluntarily, so I'm tight on cash. Be gentle Share this post Link to post Share on other sites
ilk 0 Posted June 4, 2014 I have a cheap 8port DVR with 2 cameras already connected which are working perfectly and are being recorded. I've decided to connect an existing 3rd camera which is used for delivering a picture to the local CATV network on a single channel, but was not being recorded... so I got a BNC t-splitter and connected one end of the 3rd camera to the old RF modulator and the other one to the DVR for recording. The RF modulator is two floors above, and it's connected to the 3rd camera below through some weird thin coax cable. I have not installed this RF modulator, it was there before we got a DVR and started toying with more CCTV in our building. Here's how the RF modulator looks like: http://i.imgur.com/NbWnhBL.jpg Keep in mind: -Power supply has been checked and is good... have tried a different one -The camera is good, even though I've tried another one -If I disconnect the RF modulator line from the BNC splitter, everything works great and there is no interference -If both the DVR and RF modulator are connected, there is a bit more interference on the RF modulator, but the picture on the DVR goes mad, as you can see on the video... Here's the video: http://videobam.com/tTkIn (if the above doesn't work, try this link: https://vidd.me/vAc ) Here's a quick schematic of how things are connected: http://i.imgur.com/NAQOKyu.png So, what could it be? I'm doing this voluntarily, so I'm tight on cash. Be gentle Sounds like you have double terminated the video. Get rid of the splitter and install a VDA. Never ever use splitters (tee pieces or goal posts) for cctv! Ilkie Share this post Link to post Share on other sites
stipan 0 Posted June 4, 2014 Any other solution, other than installing a VDA? If not, I don't suppose you know of a cheap 2port VDA, by any chance? Have a link for a product which you may recommend? Share this post Link to post Share on other sites
