Hi @faber1416
This project got shelved a few months back. I think I may have improved things from when I last posted. Looking through my notes I may not have been resetting the NCOs synchronised with a SYSREF event. After I did that I got this for a capture on Tile 224:
Still not exactly what I was expecting but the result was consistant. I guess it may be due to path delays in the loopback card but I haven’t looked in to it any further.