Reminder, SAS PHY WG call, May 22, 10:00am CDT

Guillaume Fortin (Montreal) Guillaume_Fortin at pmc-sierra.com
Thu May 22 14:04:38 PDT 2008


Formatted message: <A HREF="r0805223_f.htm">HTML-formatted message</A>

You are correct about the 1400 ppm/us. This is where a nominal JTF will
give a residual jitter of 0.1UIpp when the input transition density is
0.5. 
If the transition density is 0.3 (repeating D30.3), the maximum df/dt
that will give a residual jitter of 0.1UIpp with the nominal JTF is 840
ppm/us (1400 ppm/us * 0.3/0.5).  The informative max df/dt of 850 ppm/us
that is in the spec was derived using the D30.3 pattern.
Guillaume
________________________________
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Jenkins,
Mike
Sent: Thursday, May 22, 2008 3:49 PM
To: Alvin.Cox at seagate.com; t10 at t10.org
Subject: RE: Reminder, SAS PHY WG call, May 22, 10:00am CDT
All,
Regarding T10/08-248r0 presented on the call this morning, I believe it
was Bruce Johnson who asked about whether the proposal adequately
stressed delta-F/delta-T.  FWIW, it seems that extending Guillame's
analysis on slides 7-9 shows that the peak dF/dt for the prescribed SJ
is about 1400 ppm/usec, independent of the modulation frequency.  Hence,
it seems this test comfortably bounds the earlier proposed 1250 ppm/usec
SSC limit.
Regards,
Mike
________________________________
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of
Alvin.Cox at seagate.com
Sent: Wednesday, May 21, 2008 10:28 AM
To: t10 at t10.org
Subject: Reminder, SAS PHY WG call, May 22, 10:00am CDT
Toll Free Dial in Number: (877)810-9442 
International Access/Caller Paid Dial In Number: (636)651-3190 
PARTICIPANT CODE: 3243413 
Webex information: 
https://seagate.webex.com/seagate 
Topic: SAS-2 PHY WG 
Date: Thursday 
Time: 10:00 am, Central Daylight Time 
Meeting number: 826 515 680 
Meeting password: 6gbpsSAS 
Agenda: 
1. Letter ballot comment resolution: 
	a.  Update on receiver testing. [Witt, Newman] 
	b.  External mini-SAS Cable keying 
	c.  Please identify any additional concerns not addressed yet.
Alvin Cox
Seagate Technology, LLC
Cell 405-206-4809
E-Mail	alvin.cox at seagate.com



More information about the T10 mailing list