Reminder: SAS PHY WG conference call, 3/29/07, 10:00 am CDT

Jenkins, Mike Mike.Jenkins at
Wed Mar 28 17:40:59 PDT 2007

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Below are links to two 8G Fibre Channel documents describing test
patterns which I would like to propose for consideration in the 6G SAS
spec.  The motivation for new patterns is that scrambling made previous
patterns far too pessimistic.  Even in the unlikely event that a
CJTPAT-like pattern did occur, scrambling which includes the frame
header would now ensure that it did not repeat.
The 1st presentation describes what is now termed JSPAT, a 500-bit,
spectrally rich payload pattern for TX jitter testing.	The 2nd
presentation describes JTSPAT, a pattern with sequences like CJTPAT but
within the 1e-12 probability of occurrence.
*	SJPAT for 8GFC PWS and WDP, 
*	Proposal for 8GFC Jitter Test Pattern,
Both of these patterns have been voted into the 8GFC draft spec.
From: owner-t10 at [mailto:owner-t10 at] On Behalf Of
Alvin.Cox at
Sent: Wednesday, March 28, 2007 2:39 PM
To: t10 at
Subject: Reminder: SAS PHY WG conference call, 3/29/07, 10:00 am CDT
Toll Free Dial in Number: (866) 279-4742 
International Access/Caller Paid Dial In Number: (309) 229-0118 
Webex information: 
Topic: SAS-2 PHY WG 
Date: Thursday 
Time: 10:00 am, Central Daylight Time (GMT -05:00, Chicago) 
Meeting number: 826 515 680 
Meeting password: 6gbpsSAS 
We will continue our discussion on the number of taps for the reference
receiver. The minutes of the 3/22 call are posted at the link below and
contain several links to various data sets regarding transmitter
equalization and DFE performance. Please be prepared on the 3/29 call
for a strawman vote on the number of taps we should specify for the
reference receiver model. 07-063r3 has been posted. 
I would like to look at the jitter numbers for both transmitter and
receiver. Although we are still waiting on the measurement methodology
information from ST Microelectronics, it is in process. The actual
numbers can be determined while we wait for the presentation regarding
the testing. My input is that we test the transmitter with one or two
patterns. The receiver testing may include something different.
Another possible item is 07-119. I don't know that Rob has had enough
time available to update this proposal. 
Please send me any discussion items you may have. I will ask for these
at the first of the call, but sending them to me or the reflector prior
to it is appreciated.
Alvin Cox
Seagate Technology, LLC
Tel 405-350-7424
Cell 405-206-4809
E-Mail	alvin.cox at

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