[SI-LIST] Re: HSPICE deck for single ended TDR
- From: "Zhenggang Cheng (zhenggch)" <zhenggch@xxxxxxxxx>
- To: "Dan" <signal.integrity2@xxxxxxxxx>, "Alfred P. Neves" <al@xxxxxxxxxxxxxxxxx>, <weirsi@xxxxxxxxxx>
- Date: Fri, 25 Mar 2011 10:14:33 -0700
Dan,
Do you have sufficient time domain simulation time? 1/T = delta_f, so
try to play with simulation time such that delta_f is <= the touchstone
delta_f.
Zhenggang CHENG
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Dan
Sent: Friday, March 25, 2011 8:34 AM
To: Alfred P. Neves; weirsi@xxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: HSPICE deck for single ended TDR
HI Alfred/Steve/Others,
thanks for your reply. It is the touchstone file from simulation
tool.The
s-parameter fileis correct since i am getting correct insertion loss and
return loss. Can i get any reference hspice deck so that I can compare
it
with what i have created.
Thanks agaian.
Regards
Dan
On Fri, Mar 25, 2011 at 7:50 AM, Alfred P. Neves
<al@xxxxxxxxxxxxxxxxx>wrote:
> I would suggest starting with a known trace, something to verify you
> measurement and simulation methodology with. Classic resonating
Beatty
> standards work very well for this. Also, did you do some basic
calibration
> verification on you VNA? Also, check the full s-parameter matrix
including
> diagonal terms to insure you have adequate return loss into you
launch.
>
> We have numerous white papers on our website for achieving
correspondence
> between measurement and simulation to within 2% past 30Ghz using our
Channel
> Modeling platforms we developed exactly for this purpose.
>
>
>
> Regards,
> Alfred P. Neves
> Director of Business Development
> Wild River Technology LLC
>
> work 503 718 7172
> mobile 503 679 2429
>
> Sent from my iPad2
>
> On Mar 25, 2011, at 2:22 AM, steve weir <weirsi@xxxxxxxxxx> wrote:
>
> > Dan, one other thought: I think that you would be better off with
log
> > frequency points in the S parameter file than linear. At any rate,
I
> > suspect that you do not have enough points and/or coverage across a
wide
> > enough frequency spectrum.
> >
> > Steve.
> > Dan wrote:
> >> HI All,
> >> I have the touchstone file of a single ended trace. I am using
HSPICE to
> >> import that touchstone file and plot the impedance vs time. I have
> created a
> >> hspice deck and am not getting exact TDR waveform. Can anyone help
me on
> >> this?
> >>
> >> Thank You for your help.
> >>
> >> Dan
> >>
> >>
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> >
> > --
> > Steve Weir
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