HDbaseT --> no signal on TVs

L

lauraparis

n00b
Joined
Dec 16, 2019
Messages
11
Hello,

For the small fitness center I'm about to open in Paris, I have a HUGE problem with HDbaseT.

I want to send my videos to 4 TVs. For the sound system, all is ok, I extract the sound from the PC visa a USB port and a Focusrite device (--> amplis --> passive speakers), but for image, big problems...

My configuration is:

PC Graphic Card Nvidia Geforce GT1030
-->(HDMI)--> Blustream HSP14CS (transmitter)
-->(cat6)--> Blustream HEX70B-RX (receiver)
-->(HDMI)--> 4K TV LG 75SM9000

I have 4 TVs, and the 4 cat6 cable lengths are: 24 meters / 32 meters / 38 meters / 43 meters

With the 43 meters cable, no power light on the HDbaseT receiver. So the TV displays "no signal" of course.

I have simple UTP cat6 cables, so I bought S/FTP cat6 cables --> same problem.
I changed ALL the HDMI cables with costly shielded HDMI --> same problem.
I changed ALL the RJ45, trying costly shielded ones --> same problem.
I tried lower PC video resolutions --> same problem.
I tuned the HDbaseT transmistter EDID to 3 ON/ 2 OFF/ 2 OFF/ 1 ON (4K30Hz 4:4:4/2.0ch) --> same problem.
I tuned the HDbaseT transmistter EDID to 3 OFF/ 2 ON/ 2 ON/ 1 OFF (4K60Hz 4:2:0/2.0ch) --> same problem.
I tuned the HDbaseT transmistter EDID to 3 OFF/ 2 OFF/ 2 OFF/ 1 OFF (1080p/2.0ch) --> same problem.

Of course, I used a test device to check the cat6 cable: the cable is ok.

Normally, all my installation would support 60Hz 4:4:4 and 4K. I don't even tried 4K, I only need 1080p. But even with 1080p, problem.

The Blustream normally would be ok with the lenght of my cables. But even when I connect only 1 cable, the 43 meters cable, that long cable doesn't work.

Where is the problem? The graphic card? I have to add a DC12V power device to the 43 meters away receiver (normally the PoC is ok with my lenghts?

Weeks and weeks trying to find a solution... :/

Thanks a lot,

Laura

cable.jpg
 
Did you test the cables with a qualification tester? or a cheap amazon/ebay continuity/polarity tester?

Did you terminate your own cables? are you using cheap patch cables (probably CCA and not full copper)?
 
Thanks for the reply. I tested only with a cheap amazon tester...
I first used cheap cables (3 of them, the shorter ones, are ok, and the 3 TVs display the videos), then, for the longer cable (43 meters), I used this:

r.jpg
 
lauraparis said:
Thanks for the reply. I tested only with a cheap amazon tester...
I first used cheap cables (3 of them, the shorter ones, are ok, and the 3 TVs display the videos), then, for the longer cable (43 meters), I used this:

View attachment 464958
Click to expand...
If the wires are CCA, I wouldn't be surprised it doesn't work. The shielding isn't the issue, it's the actual wires are lossy. CCA is also dangerous for use in POE, it could actually cause a fire.

Best bet would be to buy some high quality copper cat6, and see what happens. Forget about the shielding, you don't need it.

Something like this https://www.monoprice.com/product?p_id=8103
With appropriate terminators.
 
lauraparis said:
Great, so I'll change the cables.

So, for new cables, what do I need to ensure PoE?
  • Copper mandatory?
  • F/UTP and no UTP?
  • Cat7 possible? (on amazon, it seems that there are more products available on Cat7 than on Cat6)?
  • 23AWG?

Is this cable nice? https://www.amazon.fr/HB-DIGITAL-halogène-Conforme-données-Ethernet/dp/B082Y7C6BZ
Click to expand...
Full copper is the most important spec. Standard cat6 should work for you. 23AWG is also important, if you have cable that claims to be cat6, but is not 23AWG it is counterfeit. Terminating shielded cables is harder, and they are more expensive. I would recommend buying some regular cat6 (quality) cable from a reputable manufacturer, and tools to terminate them.

I have used this stuff for video before. 40+M is starting to be long runs, but should still be within spec.

https://www.amazon.com/fastCat-Cat6...qid=1650310156&sprefix=fastcat,aps,161&sr=8-3
 
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