vhl in SAS3_EYEOPENING

Remby Taas rembyt at marvell.com
Fri Oct 18 17:59:41 PDT 2013


* From the T10 Reflector (t10 at t10.org), posted by:
* Remby Taas <rembyt at marvell.com>
*
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
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 [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
Subject: vhl in SAS3_EYEOPENING
* From the T10 Reflector (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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