This is exactly the type of discussion
we need at the meeting. It will be included along with any other issues
that people can find with the specification.
"Jenkins, Mike"
<Mike.Jenkins@lsi.com> Sent by: owner-t10@t10.org
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04/16/2007 11:55 AM
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<t10@t10.org>
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Subject
Proposal for additional 6G SAS Phy spec
Alvin & the SAS Phy folks,
I would like to revive the proposal for a
minimum spec on the TX VMA. I believe Kevin originally proposed this,
and now, especially in the absence of a normative spec on de-emphasis,
I believe nothing formally limits the minimum VMA. The current proposal
sets max/min limits on the peak voltage, but not on VMA which is arguably
a more relevant parameter for signal integrity.
Hence, I propose 600 mVppd as the minimum
value for TX VMA (which is the same value I believe Kevin proposed originally).
This subject really doesn’t seem to have
much meat for a presentation, but I would like to discuss this during the
Phy meeting, if we can spare a little time. I will try to summarize
these points with a few slides and will upload them if anyone requests.