Hi all
We are seeing some errors where our ADC16x250 cards don’t seem to be completing SERDES calibration successfully when programmed (using the adc16_init.rb script). Running the adc16_status.rb script we see errors like this: rofl1: Design built for ROACH2 rev2 with 8 ADCs (ZDOK rev2) rofl1: Gateware does not support demux modes rofl1: ZDOK0 clock OK, ZDOK1 clock OK rofl1: AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHH rofl1: 12341234123412341234123412341234 rofl1: .............................XX. deskew rofl1: .....XXX.....X...............XX. sync Interestingly, out of our 16 roach2 boards, it seems to only/mainly affect boards #1 and #7. The FPGAs themselves seem to be clocking correctly, and we’re reasonably sure that we have good clock signal distribution. Iteratively reprogramming the roach we can eventually get these boards to calibrate successfully, but it takes multiple trials. Any ideas of things to check/consider? Thanks Danny
