We are trying to send analog CVBS video signal which is decoded by TW990 decoder from which outputs (8bit data + VSYNC + HSYNC) are fed into Texas Instruments 10bit serializer connected to deserializer, the outputs of the deserializer are connected to ADV7391 encoder (configured like in the Table 71 except we set 0x88 to 0x00 [as we are sending 8-bit data]). We've also tried different scripts, with same results.
The thing is that we are getting the image split horizontally and the green/black bar shows in random place depending on when we turn on the serializer or deserializer, then that bar moves down in random time intervals (like stays for few seconds in the same place, then moves few milimiters down and so on). Also, it looks like the image lacks some color depth.
We have also tried to use SAV/EAV ebedded into the data, but that results in blurrer (and/or pink) image flickering which moves from right to left all the time (well, sometimes it stops moving but its splitted into 4 with horizontal and vertical bars, and the image is not of the best quality.
What could be the reasons of those symptoms in both cases (with H/V syncs on separate lines and in case of SAV/EAV embedded in the stream)?
What could we measure to find the root cause?
Thank you in advance
