Lawrence Posted May 14, 2018 Report Share Posted May 14, 2018 Hi Folks, I'm using a Dell workstation with Quadro P2000 as display computer, outputting 3 sets of HDMI signal at 1920x1080@60Hz to projectors. On the display card end, I used DP to HDMI adaptor, then two shorter paths (15-20m) I use HDMI cables directly, while the longest one is about 25m, I use Kramer HDMI to cat5 extender. There is no issue about the HDMI direct cables but I consistently experience video signal interrupt once a day, happens at random time. We used Kramer extender before and its quality is good, so we thought maybe our Cat5e cable was not good enough or there was some noise, or maybe the projector had problem. We switched to use the latest HDMI fiber cable (the cable core is optical fiber, not an extender type) and swap another projector, but after a few days, same things happened. For your info, all projectors are BenQ PU9530. Most of the time the video signal is disrupted and resume after a while, there are times that when picture resume, Watchout display was minimise and need to remote control it to bring it back to the front. I discussed this with various person and they had diverse options, some said that HDMI has the 5Vdc pin and the line voltage drop as it travel long distance, so the more ports you are using, the higher voltage drops you will experience, but I tried using the computer to output only the longest video signal, and the problem still exist with only one video port. Some said all those extender, fiber cable are unstable and only the HDMI cable with embedded amplifier is stable. So what are you using to extend video signal beyond 20m? Do you tend to use less than 3 ports per card? Regards, Lawrence Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.