Video stream errors
Posted: Fri Oct 30, 2015 6:59 am
I just recently bought a DTX1and found that two different receivers were loosing video data at the same time. This showed as dropped or corrupted frames and one of my RX's reported video stream errors. I ran a test with a direct (attenuated) connection from TX to RX to eliminate any external interference with the same result.
Eventually, I was able to trace the problem to unreliable WSS format selection. My camcorder outputs 16:9 with WSS and the DTX1 input aspect ratio was set to auto. I found if I manually switched between 16:9 and 4:3, I could generate the same loss of video data. So I've set the aspect ratio to 16:9 and the problem has gone away. It would seem on AUTO, the aspect ratio is occasionally changing state. The WSS signal looks good on the scope.
I hope this helps anyone who may have experienced the same problem.
Eventually, I was able to trace the problem to unreliable WSS format selection. My camcorder outputs 16:9 with WSS and the DTX1 input aspect ratio was set to auto. I found if I manually switched between 16:9 and 4:3, I could generate the same loss of video data. So I've set the aspect ratio to 16:9 and the problem has gone away. It would seem on AUTO, the aspect ratio is occasionally changing state. The WSS signal looks good on the scope.
I hope this helps anyone who may have experienced the same problem.