Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

[802.3_50G] Question on precoder optionality



In the July meeting we adopted the PMA baseline which included PAM4 precoding (detailed in hegde_3cd_01_0716). The adopted baseline presentation (nicholl_3cd_01a_0716) states “Mandatory to implement for Tx on PMAs driving backplane, copper and C2C.” & “Optional to enable (on links with dominant first DFE tap)”.


Is the intention that the precoding is “global” across all 8 physical lanes in 200/400GAUI-8?  Or can it be optional on a single physical lane on the AUI?


Or perhaps this is for further discussion…