[SI-LIST] Re: AW: IBIS-AMI Simulation produces split eye diagram
- From: Todd Westerhoff <twesterh@xxxxxxxxxx>
- To: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- Date: Wed, 5 Jan 2011 08:24:56 -0500 (EST)
I recommend looking at the impulse response of the channel (the first step of
any IBIS-AMI simulation) to see how long reflections live in the channel. That
should tell you whether the closure you're seeing is due to reflections or not.
Todd.
--
Todd Westerhoff
VP, Software Products
SiSoft
6 Clock Tower Place, Suite 250
Maynard, MA. 01754
(978) 461-0449 x24
twesterh@xxxxxxxxxx
www.sisoft.com
On Jan 5, 2011, at 3:38 AM, "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
wrote:
> Hi Ravinder,
>
> the split eye could be caused by reflections. The reflections with Short
> traces tends to look like Jitter, but with longer the traces, the eye will
> start to split up.
>
> BR
> Gert
>
>
> --------------------------------------------------------------------------
> Absender ist HARTING Electronics GmbH & Co. KG; Sitz der Gesellschaft:
> Espelkamp; Registergericht: Bad Oeynhausen; Register-Nr.: HRA 5596;
> persönlich haftende Gesellschafterin: HARTING Electronics Management GmbH;
> Sitz der Komplementär-GmbH: Espelkamp; Registergericht der Komplementär-GmbH:
> Bad Oeynhausen; Register-Nr. der Komplementär-GmbH: HRB 8808;
> Geschäftsführer: Edgar-Peter Duening, Torsten Ratzmann, Dr. Alexander Rost
> -----Ursprüngliche Nachricht-----
>
> Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
> Auftrag von Ravinder.Ajmani@xxxxxxxxxxxxxx
> Gesendet: Mittwoch, 5. Januar 2011 05:33
> An: si-list@xxxxxxxxxxxxx
> Betreff: [SI-LIST] IBIS-AMI Simulation produces split eye diagram
>
> Hi All,
> I am using Cadence PCB-SI simulator for running IBIS-AMI Channel simulation
> on a Serial interface. The eye diagram generated by the tool is split, with
> initial 1/3 part of the eye diagram appearing after the remaining 2/3 part.
> This does not happen if the channel length is small
> (1 - 2 inches).
>
> I would like to know if anyone else has observed similar phenomenon. I have
> taken up this issue with Cadence as well as the IBIS-AMI model vendor.
> Cadence response is that this is due to the model issue, whereas the model
> vendor says that the model works fine with other simulators.
>
> Thanks for the help.
>
> Regards,
> Ravinder Ajmani
> Server PCB Development
> Hitachi Global Storage Technologies
>
>
> Email: Ravinder.Ajmani@xxxxxxxxxxxxxx
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
