Thank you so much for your help in advance!
My sincere apologies or the delayed first response. I mixed up this question with another and hence missed responding to this thread.
Please check my response on the 8B10B encoding.
An example for K28.5 encoding technical table is shown in the attached diagram.
The information is also available in our user guide below (Pg2):
However, to read the parallel data, please disable scrambling; otherwise you will be reading incorrect values. I am suspecting scrambling is enabled; hence you cannot read the correct data.