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HDMI Spec tool?

Ooh thatd be nice. If there is one, can it tackle display port too please. Squinting at the side of a cable is hard enough.
 
yeah, for labs, so it will cost you an arm and a leg, maybe a kidney.
 
I ran into this issue. I'm using a Kramer 861 to diagnose some cable issues.

It can test Active cables and up to 5 meters for copper cables, up to 4k60. It can also produce a test pattern to force 4k60 onto a display.

One of the nice things about it is that you can set timers, so it will produce a test signal or test a cable for a specified amount of time. I've found many HDMI cables or setups where the cable will initially pass but once there is a sustained uncompressed load it starts dropping out. I grabbed this tool to find those weak links.

You also want to make sure you are testing fully end-to-end. So if you are using 2 HDMI cables and a adapter or a cable extension, you want everything hooked up before you test. Testing each component individually can cause false negatives.

Another nice thing about it is it does EDID. Some HDMI adapters and cables do not pass EDID correctly, or may fail to pass EDID if damaged, so you may wind up with a connection that cannot auto detect resolution or refresh rate.
 
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