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4570 posts

Uber Geek


#271794 27-May-2020 09:40
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So have a weird requirement (in a commercial setting), to get a DisplayPort link running over around 20m - we don't normally get involved with this stuff.


Here is what i got:


This HDMI cable:


These adapters:


The guts of it is, we can get an image displaying when there is just one DP-HDMI adapter on the PC end, and HDMI input on the monitor. However, when using the proper monitor with DP input (and adding the second adapter in), there is no image.


The whole thing here, is the DP requirement is only going to be for a year or so until the PC gets upgraded and then they can just use the plain HDMI cable. I always though DP to HDMI was purely a wiring/connector change, but clearly I was wrong.


How do we tackle this?

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7668 posts

Uber Geek


  #2492647 27-May-2020 11:00
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Hi, HDMI and DP are two totally different signalling technologies, and while you can use a simple wire adaption as is commonly done, I think you will find the wheels will fall off if you add an active HDMI link in the middle that is incapable of dealing wtih LVDS (as opposed to TDMS) or the fact that DP uses packetised traffic, where HDMI does not.



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