SAS-2 PHY WG conference call
Alvin.Cox at seagate.com
Alvin.Cox at seagate.com
Wed Sep 20 08:55:38 PDT 2006
Formatted message: <A HREF="r0609200_f.htm">HTML-formatted message</A>
Agenda:
Letâs start working the PHY specification numbers now that training and
SSC have been addressed.
Reference proposals:
Historical:
http://www.t10.org/ftp/t10/document.06/06-053r0.pdf
Recent:
http://www.t10.org/ftp/t10/document.06/06-419r0.pdf
|From last weekâs discussion of 06-419:
Defines how de-emphasis is measured for the simulations in this proposal.
Concern voiced that the de-emphasis measurement definition doesn't locate
the peak in the correct position. It is dependent on rise and fall times.
Maximum rise time needs to be no greater than .41 UI and the minimum rise
time needs to be smaller.
Also looks at deterministic jitter relationship to de-emphasis.
Initial reference transmitter table does not include numbers for
differential and common mode return loss. Differential RL suggested being
similar to 10G Base-KR and the common mode RL similar, but -6dB and TBD
frequency dependency.
Differential impedance plus differential return loss should not both be in
the reference receiver table. Suggested dropping differential impedance
requirement (as is being done in another similar standard).
Need to add jitter tolerance.
Minimum number of taps should be 3 based on existing data and
recommendation of 4 +/- 1 tap.
Minimum values need to be used for the reference values.
Kevin asked for suggestions as he has provided the initial pass at
defining a reference transmitter and receiver.
We also need to look at the 10-meter external cable requirement.
Conference call September 21, 2006
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Topic: SAS-2 PHY WG
Date: Thursday, Sept 21, 2006
Time: 10:00 am, Central Daylight Time (GMT -05:00, Chicago)
Meeting number: 826 515 680
Meeting password: 6gbpsSAS
Alvin Cox
Seagate Technology, LLC
Tel 405-350-7424
Cell 405-206-4809
E-Mail alvin.cox at seagate.com
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