Hi Andrea, I used 50MSPS. The align bit doesn’t need to be on for PRBS to work. It worked fine on individual or more than one channel, but just not aligned. I’d suggest running at 25MSPS or something considerably slower and then bumping up. Do you need the PRBS to work for mass test or is sine wave pattern okay? The align bit makes all channels of the device fully aligned for any of the test modes, so that would be a good replacement test, much more lightweight also than a lfsr checker. We usually only advise PRBS as debug step for higher data rate interfaces, 2x mode will be 6x serialization factor so your data rate is only 300Mbps. If you cut sample rate in half this should cut in half also. I still think it’s strange for you to see incorrect data on all the channels synchronously. That doesn’t make me think signal integrity. Perhaps DVDD supply for that code is much higher current and causing a drops out of the supply or something similar. Can you share power supply schematic? Thanks
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