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[802.3_100GCU] 100GBASE-KP4 transmitter ad hoc - Thursday 18 October meeting minutes



Dear Task Force Participants,

The 100GBASE-KP4 transmitter ad hoc met on Thursday 18 October @ 12pm Pacific time.  The meeting minutes are below.  The next ad hoc meeting will be announced over the reflector soon.

With regards,
-Kent


------------------------------------------------------------------
Thursday 18 October 2012

Attendees:
Matt Brown
Charles Moore
Megha Shanbhag
Jeff Slavick
Piers Dawe
Galen Fromm
Rick Rabinovich
Stephen Bates
John Nolan
Albert Varlijian
Liav Ben-Artsi
Wheling Cheng
Beth Kochuparambil
Adee Ran
Kent Lusted
Ali Ghiasi
Mohammad Kermani
Vasu Parthasarathy
Rich Mellitz
Pavel Zivny
Will Bliss
Zhongfang Wang

(If I missed an attendee, please let me know.)


12:02pm start


Patent policy reminder.  No one responded.

Kent Lusted displayed lusted_3bj_01_1012.pdf as discussion points.

Ad hoc scope changed slightly to be a 100GBASE-KP4 transmitter characteristics ad hoc.

Discussion on using Linear fit waveform for rise/fall?
*       Action Item:  Charles - first analysis of transition times from linear fit

Pattern discussion:
*       Pavel Zivny and Will Bliss investigating  pattern for RX test.
*       Discussion on pattern selection
*       Discussion to include FEC logic in RX test or not
*       Discussion on reuse of distortion pattern for RX testing

Training pattern open items:
*       Action Item:  Training to data mode initialization with termination bits (Adee/Kent)
*       Action Item:  Training pattern seed structure changed based on partial state to full state pinning (Adee/Kent)
*       Action Item:  Example training frame sequence (Adee/Kent)
*       Due in 2 weeks


Signal levels method
*       Pk-pk limit approach is different from Clause 93. (TBD)
*       Discussion on lowering pk-pk diff output voltage to less 1200 mV
*       Discussion on reducing nominal voltage to less than 800mV.
*       Next week: pk-pk and nominal voltage discussion
*       Action Item:  Kent/Charles to align ad hocs


Linear Fit test pattern:
*       Discussion on need to define the pattern.  PRBS9 not used in KP4
*       Action Item:  investigate pattern  (Adee/Kent) - 2 weeks


Output waveform TBD
*       Steady state voltage and linear fit pk is TBD
*       Action Item:  Coef ratios for INITIALIZE (Kent Lusted) in 2 weeks


94.2.2.3 Overhead usage
*        Action Item:  report out discussion on overhead bits (Zhongfang Wang and Matt Brown)


End at 12:53pm