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DAC39J84: Link layer test failing with disparity error

Part Number: DAC39J84

Tool/software:

Hello TI Support,
        I am currently trying to get the Link layer test working for my system which consists of a Xilinx FPGA and DAC39J84.

        I managed to get the Repeating ILA test to complete successfully.

        However for the Repeated K28.5 test I keep getting disparity error on Lane #0 alarm register (i.e. Register 0x64 bit8 = 8b/10b disparity error). 
        Similarly for Lane #1.

        I'm only configuring register Config74 for these tests which based on my understanding is all that is required.

        Am I missing any other configuration for this particular test?

        Thank you.

Regards,
Tai