[SI-LIST] Re: A question about XTK
- From: "Abe Riazi" <ariazi@xxxxxxxxxxxxxxx>
- To: "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Mon, 18 Nov 2002 17:02:39 -0800
Hi Tadashi :
Yes, I can run this simulation and have also used "RANDOM" options
with number of CYCLES as high as 6000. But large cycle numbers
significantly reduce simulation speed.
The simulations were carried out using Nutcracker version of XTK
(on Windows NT platform), with back_xns 6.8.1.8 dated
2/25/2002.
Check the version/date of your back_xns.exe. Older versions
do not produce eye diagrams as efficiently.
Regards,
Abe
-----Original Message-----
From: Tadashi Arai [SMTP:arap@xxxxxxxxxxxxxx]
Sent: Monday, November 18, 2002 4:24 PM
To: [SI-LIST]
Cc: ariazi@xxxxxxxxxxxxxxx
Subject: Re: [SI-LIST] Re: A question about XTK
Hi Abe,
Can you run such simulation WITHOUT ANY PROBLEM?
I used to try "RANDOM" option (almost 1 year ago:), however it run for
64 cycles, it didn't run with "Segmentation Fault" for 128 cycles.
I am not sure if this issue was fixed.
Regards,
On Mon, 18 Nov 2002 11:17:11 -0800
"Abe Riazi" <ariazi@xxxxxxxxxxxxxxx> wrote:
>
> Perry Qu Wrote:
>
> Hi, Abe:
>
> I'm interested to know how to do this in SIF also. Could you give a short
> example showing the syntax in SIF to generate a pseudo-random bit pattern ?
> I'm
> interested in this mainly for pre-layout simulation in scratchpad.
>
> THanks
>
> Perry
>
> >
>
> Hi Perry:
>
> Here is an example .sif file utilizing the RANDOM option:
>
> Netname PERIOD: 10 %HIGH 50 CYCLES: 200 RANDOM OFFSET: 0.0 JTTER: 0.0
>
> Using a recent Nutcracker version of XTK (on a Windows NT
> platform), I have been able to select any driver of the net and then
> produce an eye pattern at the input of a desired receiver. As noted in my
> earlier post, the eye pattern can reveal information related to ringback,
> jiiter,
> min/max slew rates, source synchronous timing, etc.
>
> Best Regards,
>
> Abe Riazi
> ServerWorks
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