Am watching from Nigeria,you perfectly gave a kindergarten explanation,I mean you did a smooth, understanding explanation,a good instructor that really want his student to succeed I love this,thank you
This is an excellent video and crystal clear explanation. I have been trying to figure out where my horizontal line interference was coming from but more importantly did not know there was a fix for it, I will try this out anything, thanks.
Can you claify why its better to have the isolator at the DVR end. Wouldn't having it at the camea end reuce the potential for the interference to be picked up by the camera?
Hi Paul, Love your videos, theyre a big help, so thumbs up to you. I've just had 3 Hikvision ColourVU 5mp cameras fitted to my home, they have only been up two weeks and one camera has misted over (like condensation) and another has many thin black lines horizontally on the screen. can you possibly tell me what could be causing this ? Kind Regards Jase
Hi Jason, Sorry for the late reply, but RU-vid sometimes doesn't send us post notifications. Even though it's a little late, I'll have a crack at this! Any camera can mist over, even brand new ones. Most issues after installation are caused by the cable tail on the rear of the camera being pulled excessively during the installation process. This actually damages to waterproof seal around it. This will let in condensation, as would a slightly misaligned lens seal. Thin black lines sound like one of three issues. 1, The camera cable could be close to a power supply (especially if the installation was done using Cat5e or Cat6e) 2, The connections on either end might need replacing. Eg: Video Baluns etc. 3, the PSU "power supply unit" could need replacing. There are of course many more reasons I can think of so I'd suggest getting a professional to diagnose it for you. P.s As strange as it may seem. A simple movement of the DVR / HVR from left to right in its location can often solve pesky issues like lines on the screen. Hope this helps you in some way. Regards, Paul CCTV Systems UK
Hi, Put a data cable tester on the cable and test it! 99% of the time it's a duff cable or a bad RJ45 connection on one, or both ends. Use a made up lead to test the camera at the DVR end! This way you can also rule out a faulty camera. Hope this helps. Regards Paul @CCTVSystemsUK
When you say seperate the cat5e cables from each other, did you mean do not tie wrap the cables together? e.g. 8 cameras being fed with cat5e how would you keep them separated at the dvr end?
How to solve video interference on the intercom? Will replacing the utp cable fix the thing (up to 20m) or is there any solution without replacing the installation?
What do you suggest if at the recorder end, your still getting interference on your test monitor? Test monitors don’t have a ground. What’s the other option recable?
Hi No a video balun is a connection used when sending video down cat cable. A ground loop isolator is a piece of equipment to aid removing electrical interface from CCTV systems. Including cat cable. Hope this helps. Regards, Paul CCTV Systems UK
Hi ya I have encounterted a error on 3 of my cams it's like a white rolling line that moves from the bottom to the top of the screen other than this the picture is perfect any ideas matey?
Hi, Ground loop isolators are designed to take out most of the interference in such cases. That sounds to me very much like a light problem! Is there a light nearby? It sounds like a light fitting frequency issue to me. This usually produces horizontal lines moving from bottom to top. If this is the case. Try the camera away from the light source. Hope this helps. Regards, Paul CCTV Systems UK
Had my cctv installed for years never had this problem before whatsoever 2 are outdoor cameras and I have a camera indoors do u mean change the position of all the cameras?
Yes you will be able to use them on the DVR end but, the nature of Cat cable EG: unshielded, means that interference in the cable could conceivably be much harder to get out! But yes, you can certainly give it a go. Hope this helps. Regards, Paul CCTV Systems UK
The mains AC power cable, twin and earth, is not positive and negtive. Green or green/yellow is Earth and the other two are Active and Neutral. This is not a DC system. It will radiate noise at the local Mains AC supply frquency (50 or 60Hz generally) or a harmonic thereof. In Australia, there is a requirement to maintain about 60mm minimum gap between data/comms and power cabling and it's good practice to avoid parallel runs with AC cabling. The ground loop isolator has a Coaxial cable and connectors. Data cable shown here is UTP, Unshielded Twisted Pair. Cat5 and Cat5e and Cat 6, for example. Data cable also comes in a shielded format for use in locations where there are sources of EMF/RF Interference. Data cables are manufactured in such a way that they minimise Crosstalk. Shielded or Unshielded, there is no need to have them unbundled and in data installs its normal to see backbone data cabling loomed/bundled where it leaves the rack and also travells through the roof cavity. Generally, power in data cabling, POE, or "Power Over Ethernet" is DC, and shouldn't cause any issues within adjacent cables.
Hi, They are certainly not designed for audio use but, could possibly quiet sound down due to there ability to remove power interference. . That said, there are ground loop isolators out there designed specifically for audio that are very inexpensive and easily found with an Internet search. Regards, Paul CCTV Systems UK
Sounds to me like the ground loop isolator is too strong. If your PTZ has stopped moving simply remove the isolator, then if the PTZ resumes it's normal functionality you know that the isolator is blocking the PTZ protocols 'commands'. I know ground loop isolators are not really recommended for PTZ use but, we have installed them on PTZ's with no functionality issues. Try a different manufacturer of isolator would be my advice. Hope this helps. Regards, Paul CCTV Systems UK
