[SI-LIST] Re: Ethernet simulation question
- From: agathon <hreidmarkailen@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Mon, 8 Jan 2007 19:05:18 -0800
Dudes,
http://www.pulseeng.com/products/datasheets/G204.pdf
May I suggest reading the pdf above.
Simulations will require models for the xfmr and cables. Could be layout &
terminations causing mismatch or cm noise issues (I don't know the
symptoms).
Simulations may not include the factors causing the degradation & so won't
be seen. Even if all is modeled, how will you track down the culprit
without knowing best practices & why ?
Doh! Now, carry on. Vedy good.
Regards,
Agathon
On 1/8/07, Fabrizio.Zanella@xxxxxxx <Fabrizio.Zanella@xxxxxxx> wrote:
>
> Mike, I've run into this issue before, I pushed the vendor to provide me
> with the SPICE model for the Ethernet analog signals=2E Since in
> Hyperlynx you can link to HSPICE, I believe this is your best solution=2E
>
> Good luck,
>
> Fabrizio Zanella
>
>
>
> -----Original Message-----
> From: mkotson@miltope=2Ecom [mailto:mkotson@miltope=2Ecom]
> Sent: Friday, January 05, 2007 12:51 PM
> To: si-list@freelists=2Eorg
> Subject: [SI-LIST] Ethernet simulation question
>
> Hi all,
> I have a question regarding Ethernet simulations=2E We have a system
> that fails the Ethernet compliance tests (amplitude, rise time, fall
> time and everything associated with these) on both our 1000 Base-T and
> 100 Base-T ports=2E Due to our complicated electrical channel, the
> problem could be a number of things=2E I've been asked to do some
> simulation to determine what would be the easiest fix to make the system
> compliant=2E I contacted our silicon vendor (Intel) about models, and
> received IBIS models for both the 1000 Base-T chip (82546GB) and the 100
> Base-T chip (82562EZ)=2E Absent from both models are the Ethernet signals
> I need to simulate=2E When I asked why these pins were absent, I was told
> that they were analog signals and not part of an IBIS model=2E What is
> the proper methodology for simulating Ethernet? I'm a Hyperlynx user,
> if it makes any difference=2E
>
>
>
> I noticed a similar question was asked a few years back, but I never saw
> a good response to it=2E Thanks in advance for your help=2E
>
>
>
> Thanks,
>
> Mike
>
>
>
> Michael Kotson
>
> Project Engineer
>
> VT Miltope
>
> 4900 Pearl East Circle Suite 106
>
> Boulder, CO 80301
>
> (303) 473-0388 x132
>
> http://www=2Emiltope=2Ecom <http://www=2Emiltope=2Ecom/>
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>
>
>
>
>
>
>
>
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