I wanted to see what video standards my Nexys Video design would work with, so I took the board into work and connected it up to a Sencore Mediapro Multimedia Generator (e.g. https://www.testequipmentconnection.com/47221/Sencore_MP500.php). Strangely *nothing* worked 720p, 1080i 1080p, 50Hz, 60Hz - not even when it was generating DVI-D. Equally strange, even the HDMI/DVI-D pass-though in the design in board's flash didn't work.
However, the monitor worked just fine when it was plugged directly into the Sencore. Connecting up the logic analyser to debug signals showed unpredictable runt pulses on the HSYNC line, and after tracing and analysing an entire frame there are blocks of CTL symbols where they shouldn't be. Plugging the Nexys Video back into my Laptop or Media player everything is fine.
Not sure what is up, but something is. I tried a couple of different HDMI cables without success. It looks to be something at the physical layer... can anybody offer any advice?
Test idea #1 - I'll put a HDMI splitter between the Sencor and the board.
Test idea #2 - I'll manually decode the 50MB of captured symbols (well, write a program to do it) and see if that shows anything...
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hamster
I wanted to see what video standards my Nexys Video design would work with, so I took the board into work and connected it up to a Sencore Mediapro Multimedia Generator (e.g. https://www.testequipmentconnection.com/47221/Sencore_MP500.php). Strangely *nothing* worked 720p, 1080i 1080p, 50Hz, 60Hz - not even when it was generating DVI-D. Equally strange, even the HDMI/DVI-D pass-though in the design in board's flash didn't work.
However, the monitor worked just fine when it was plugged directly into the Sencore. Connecting up the logic analyser to debug signals showed unpredictable runt pulses on the HSYNC line, and after tracing and analysing an entire frame there are blocks of CTL symbols where they shouldn't be. Plugging the Nexys Video back into my Laptop or Media player everything is fine.
Not sure what is up, but something is. I tried a couple of different HDMI cables without success. It looks to be something at the physical layer... can anybody offer any advice?
Test idea #1 - I'll put a HDMI splitter between the Sencor and the board.
Test idea #2 - I'll manually decode the 50MB of captured symbols (well, write a program to do it) and see if that shows anything...
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