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bmw1999m3

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  1. I am using basic analog cameras. I thought baluns were needed on both ends if using cat5 because it is 100 ohm cable. The GLI's I have are marketed as GLI's+Baluns, that's why I used them at the camera end: To break the shared power and signal ground inherent to these cameras, and also because it's how I got the best image quality so far. I have tried using regular baluns on both ends, and still had lots of signal issues because of the ground loops. I have also tried GLI's only without baluns on the DVR end, but the image quality had even more issues that way. Not sure why some channels clean up perfectly and some don't, despite trying all the same devices in every combination.
  2. I cut into the cat5 sheath and pulled out the twisted pairs where I want the camera located. Some are further down the line than others. I don't know if that's what you meant by extending but that's what I thought you meant. There is no significant length of signal wire that is not twisted pair(just the pigtail hanging out of the camera). I honestly did not understand. I have baluns on all channels at the DVR because I thought that's where the 100 ohm wire needed to be converted back to 75 ohm, it is also what gave me the best results for cleaning up the images on problematic cameras(in combination with a GLI at the camera end). I still have a couple cams with bad picture quality despite trying baluns and GLI's on them, with no improvement.
  3. I have 16 cameras positioned around my property. Cat5 for security camera systems is supposed to be acceptable up to 1000 ft. Trust me, none of my cameras are anywhere near that far away. The cable runs are at maximum 150 feet or so. Is it really that important that I get a tape measure and go measure all of my exact wire lengths and give you 16 different measurements? Trust me, none of the cameras are at extreme distance. On any given cat5 cable I have cameras placed at various lengths because why would I want 4 cameras all right next to each other at the ends of the cables? Yes they are extended(if I'm understanding your question correctly). I am using real baluns with coils in them (not the fake ebay ones that are actually just connector tips). I don't see why a 10A power supply is not good enough. The current draw of each camera is only 80mA daytime and 260mA in nighttime IR mode... That's less than 5 amps maximum for all cams total during highest load, with 5 whole extra amps available for spikes. Even if power were an issue, why would the camera still be putting out a bad image when I plug them into a test battery? Power availability is not the problem.
  4. I don't understand the question about terminating each camera at cable end... ? At the end of the cable I spliced on a BNC connector and plugged in the camera. I don't understand what else there is to do..?? Most of my cameras have GLI's at the cable end (between cable end and camera). The ones that don't are because the GLI's and baluns haven't helped the picture quality anyway. At the DVR end I have a balun on each channel. The cable lengths vary because the cameras are positioned at various corners of the house. They are powered with a 12VDC 10A power supply with their own dedicated power wire(not running power down a cat5 twisted pair). I already know it's not a power problem because plugging in the cameras with poor video signals directly to their own power supply does not fix the issue (They aren't low on voltage or amperage). I am using copper cable and the baluns are passive.
  5. I already know all my cameras are good- any time I see a problem that's basically the first test I do, by removing the camera and plugging it directly into a monitor inside my office. As I stated in my previous post, If I go with coax I'd have to run all new signal cables (16 cables running through my wall for 16 cameras). I'd rather minimize the amount of cabling I'd have to run (hence cat5). As for power, I am already running a separate dedicated 16-gauge power wire for all of my cameras to maximize the usefulness of the cat5 for video signals. So I know power is not an issue (I know how to test for voltage at plugs and even if I didn't, I have a portable 12v battery I use for testing purposes-I know there's no power delivery problem).
  6. Thanks for the reply. I know it's not a power problem because I have a portable 12v battery I use for testing purposes. Plugging the camera directly into the battery didn't make a difference, signal quality is still terrible at DVR end. I'm thinking the problem must lie within the wire but I don't see how because I didn't pinch/crimp or break the wire anywhere. I have had rotten luck with these cat5 analog camera systems and have been fighting signal degradation issues since the beginning on multiple cameras. Sometimes baluns and Ground Loop Isolators fix quality issues on some cameras, but not on others, and I don't know why because they are all set up the same way. For example on some cameras I had crosstalk/rolling effects and the image cleaned up perfectly with a GLI. On other cameras with the same problem I would install the GLI and the image would go completely black, or have no improvement at all. I've even tried swapping replacement GLI's and Baluns in case they were bad, and they were not. It's really hit and miss and I don't understand it. I have good connections and am certain the wires couldn't be this problematic because of the sheer amount of signal issues I've had over the years with all brands of cat5 cabling. Whether it's cheap or expensive wire, I've still experienced signal quality issues on both and I haven't narrowed down the cause yet. The signal is traveling down probably about 150' of cable. I use a single pair for each camera signal (for example, solid green for camera signal + and striped green for camera signal -)I have already tried plugging the BNC into other DVR channels and even into a screen input source directly with no changes in quality. If I can't figure out how to get reliable and consistent results with cat5, I'm thinking of switching to coax. So far I haven't because I don't want to run a bundle of 16 cables through a hole in my wall if I can fit 16 camera channels on 4 cat5 cables instead.
  7. Hello, I'm having a problem with my security camera video feed. The image is extremely dark and has tearing/jerking effects. Camera signal is run over cat5 ethernet twisted pair. Camera and power supply are not the problems because I swapped them out and am getting the same effect. No combination of baluns or ground loop isolators solve the problem. The wiring is not at an excessive distance, I have other cameras at greater distances with no problems. Here is a video of the issue https://youtu.be/k1vAJDGVJ3Y Here's another video with the brightness turned up for better visibility: https://youtu.be/-SPSEtK4660 Input is appreciated.
  8. PROBLEM SOLVED! Thank you everyone for your replies. The issue was the cheap crappy low-end Chinese KKMoon DVR! I replaced it with a higher-quality DVR (Interlogix Truvision) and the flickering problem is gone!! I wasted so much time swapping wires, cameras, baluns, GLI's, and other components.... it was the DVR's terrible processor/software the whole time!!!!
  9. Yeah my channels get the image mixed from other cameras and I have no idea why!!! So that's a CPU overload? I figured it was a problem in the DVR, but I thought it had something to do with a signal-lock loss due to resistance fluctuations or something. They are all analog cameras(non-HD), they are mixed brands of 700tvl - 1300tvl cameras. Where is the 3D NR Noise Reduction feature? I looked all through the DVR Menus and can't find anything close. Here is a screenshot of the OS I'm using:
  10. Hi, thanks for the reply. I have tried disconnecting all cameras and plugging in one at a time and it still flickers regardless of how many are plugged in. I don't think the processor is overloaded because of that, and also all 16 cameras work fine most of the time. The flickering only occurs a during a couple periods of 1-2 hours a day seems. Not sure yet if there's a predictable pattern. The flickering also seems fairly random.
  11. Flickering issue on my cams- have tried everything from replacing baluns, GLIs, power supplies, wires, cameras, and still this issue persists. Please help!
  12. I have 12 cameras hooked up, all with ground loop isolators and baluns. Quality is magnificent, except for some reason around 7-8 in the morning, several cameras produce a flickering, artifact-riddled picture on my screen. I have swapped out baluns, GLIs, cameras, and wires to try to figure out what the culprit is. I even powered the cams up with their own power supplies to rule out ground loops and low power levels. Can't figure it out. Does anyone know why this is happening? Thanks.
  13. I already answered those questions in my previous comments.... but so much of what I "wright" is "crap" anyway.
  14. Ok so I wanted to give an update since I've made progress on fixing this problem. I tied together the foil shield/sheath of the STP cat5 cable to the power ground. My theory on what happened is this: I have several cameras mounted next to a wooden carport with a sheet metal roof. The camera wires run right up next to the sheet metal roof and I think it was acting like a big antenna, absorbing or amplifying ambient EMF signals in the air and causing them to be inducted into the signal wire. Since I neglected to connect the foil shield to anything, I think the transient voltages were building up in the foil sheath and being inducted into the signal twisted pairs. When I connected the foil shields to the power supply ground wire, it neutralized the potential that was building up in the foil shield and directed it all to ground. So this leads me to believe I wasn't really having a ground loop problem so much as I was having an interference problem. If anyone has experienced this problem before or has any thought on this, I would be glad to hear from you.
  15. 200 feet... and powering 3 cameras over two UTP cat5 cables. Yup. Try using a good cable. I'm using totally separate 18-gauge wires(pair in a shielded sheath) for power. Videos signals are going down Shielded Twisted Pair (STP) Cat5. None of the cat5 pairs are being used for power. Do I need to buy baluns with a certain rating/specification? Do balun ratings need to be matched to cable length? Do cameras all need to be the same make/model? Are the signals somehow different if the cameras are different? Is it possible that signals are bleeding into neighboring wires via electromagnetic field inductance? If so, should I run the signals down a specific set of pairs or limit the number of cameras on each cat5 cable?
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