vhl in SAS3_EYEOPENING

Newman, Harvey Harvey.Newman at lsi.com
Mon Oct 21 10:11:20 PDT 2013


Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r1310212_f.htm">HTML-formatted message</a>

Hi Graeme,
The definition of Vhl for SAS-3 is the largest peak to peak voltage over any
80 UI since this is the defined measurement interval. It is not intended to
include noise on the measurement so averaging is allowed.
Regards,
Harvey Newman
LSI Corporation
(408) 433-4028
From: owner-t10 at t10.org [mailto:owner-t10 at t10.org] On Behalf Of Graeme Boyd
Sent: Monday, October 21, 2013 8:15 AM
To: Remby Taas
Cc: why at pmcs.com; t10 at t10.org
Subject: RE: vhl in SAS3_EYEOPENING
Remby
I would need someone (maybe Harvey or Alvin) to clarify the definiation of
Vhl as used within SAS3.
Graeme
On Fri, 2013-10-18 at 17:59 -0700, Remby Taas wrote:
Graeme,
Hi, would you have suggestion for the calculation of vhl(as defined by SAS3
spec) using any script output parameters?  or would the SAS3_EYEOPENING get
updated?
thnx,
remby
-----Original Message-----
From: Graeme Boyd [mailto:Graeme.Boyd at pmcs.com]
Sent: Friday, October 18, 2013 5:32 PM
To: Remby Taas; t10 at t10.org<mailto:t10 at t10.org>
Subject: RE: vhl in SAS3_EYEOPENING
The definition of Vhl from sas3r05g is "the peak-to-peak voltage measurement
in the interval t1 to t1+80T", which I originally thought was the same thing
as "Maximal Peak Low-frequency Amplitude (K0)" as reported by the script.
However the values for Vhl(k+1)-Vhl(k) in table 45 vary between the 3 values
(-20 to +20; -40 to -10; +40 to +10) - only the first makes any sense based
on Vhl being the same thing as K0.
Graeme
________________________________________
From: owner-t10 at t10.org<mailto:owner-t10 at t10.org>
[owner-t10 at t10.org<mailto:owner-t10 at t10.org>] on behalf of Remby Taas
[rembyt at marvell.com]
Sent: October-17-13 3:04 PM
To: t10 at t10.org<mailto:t10 at t10.org>
Subject: vhl in SAS3_EYEOPENING
* From the T10 Reflector (t10 at t10.org<mailto:t10 at t10.org>), posted by:
* Remby Taas <rembyt at marvell.com>
*
I'm doing TX-char sim with 3x waveforms(incl. no-eq ref), and I get the
following results...
TX_FFE_diff =
    0.1875   -0.2940   -0.1066
  -31.7138  -33.1855	2.0598
K0 =
    0.3702
    0.3703
    0.3699
V1V2V3_diff =
    0.0997    0.0208   -0.1181
  -25.1636  -23.6397   -0.1779
How/Where do I calculate/get the equivalent VHL?
The given/resulting V1V2V3 are the SAS3's v1, v2, v3 deltas, but the vhl is
not given for each case.
*
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