All,
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.
Both of these patterns have been voted
into the 8GFC draft spec.
Regards,
Mike
From:
owner-t10@t10.org [mailto:owner-t10@t10.org] On
Behalf Of Alvin.Cox@seagate.com
Sent: Wednesday, March 28, 2007
2:39 PM
To: t10@t10.org
Subject: Reminder: SAS PHY WG
conference call, 3/29/07, 10:00 am CDT
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information:
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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.
http://www.t10.org/ftp/t10/document.07/07-156r0.pdf
http://www.t10.org/ftp/t10/document.07/07-063r3.pdf
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@seagate.com