[STDS-802-3-400G] Electrical Ad-Hoc Straw Poll

[Andre Szczepanek <aszczepanek@xxxxxxxxx>]

At today’s P802.3bs Electrical Ad-Hoc meeting I announced we would have a straw poll on options for dealing with the connector crosstalk issue in C2M brought up by Ali Ghiasi’s presentation:

http://www.ieee802.org/3/bs/public/adhoc/elect/20Feb_17/ghiasi_01_022017_elect.pdf

 

·       Option A: Change 10.2 dB to 7.5 dB for current MDI crosstalk with CL120.d TX

·       Option B: Reduce MDFEXT=2.8 mV and PSXT=2.9 mV and define an improved CL120.d TX to support 10.2 dB

·       Option C: Reduce C2M channel loss to 7.5 dB and leave the current crosstalk limit of CL 92, then add an informative section on engineered link implementation to support up to 10.2 dB using COM analysis.

·       Option D (not in Ali’s presentation): Reduce MDFEXT=2.8 mV and PSXT=2.9 mV and define a reduced receiver Vertical Eye Opening to support 10.2 dB

 

Please send me an email specifying your preferred option (select only one).

-         Don’t get hung up on exact values. This is a straw poll, nothing is definitive – we just want to establish a direction for the group.

 

Regards

                 Andre Szczepanek (Electrical Ad Hoc chair)