Re: [SI-LIST] : W element correlation with measured data

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From: Rick Brooks (ribrooks@nortelnetworks.com)
Date: Tue Dec 14 1999 - 08:35:37 PST


I for one would be interested in this presentation, however, this particular powerpoint file (fiber_channel_analysis.ppt) is completely unwieldy.
The download was as expected for a 10 meg file, but I never had the patience to wait the estimated 30 minutes it would take to open in powerpoint.
Maybe it's just my computer, or the fact that I'm using Powerpoint '97?

Does anyone have a pdf version of this presentation?

- Rick Brooks
Nortel Networks

At 11:50 AM 12/13/1999 -0800, you wrote:
>IMAPS presentation by Jim Foppiano has comprehensive comparison of
>measured time-domain waveforms and W-element simulations for a Gigabit
>transceiver design, including long cables and traces.
>
>A pointer to the presentation was posted on the SI list few months ago,
>I included a copy below. It is still available for download.
>
>Regards,
>Dmitri Kuznetsov
>The W-element Developer
>
>Re: [SI-LIST] : IMAPS Presentation on Simulating Fibre Channel Loss
>From: Tarek Ali - WGS Board Design Technology <Tarek.Ali@East.Sun.COM>
>
>Hi,
>
> If anyone needs to download the imaps presentation please access
>my freedrive account at http://www.freedrive.com.
>
> login: tarek
> password: tarek
>
> And you can download the ppt file from the imaps folder.
> Most email systems will not permit files above 5 Meg, and this
>file is 10 Meg.
>
> Thanks,
>
> Tarek Ali
>
>
>Bradley S Henson wrote:
>>
>> Hi Ron,
>>
>> I can only speak to the fact that the frequency dependent parameters are now
>> included and look substantially more real. I have not stayed put in one job long
>> enough to actually have my folks characterize this for me! We have some work
>> going on now, but nothing as well designed as I'd specify. The results will
>> likely not be sharable due to the funding source :( Again, I don't think anyone
>> will miss this data much at all since it appears to me to be way too superficial
>> and poorly designed from an experimental viewpoint.
>>
>> If I get a chance to compare 'W' elements to measured data I'll share with the
>> list anything publishable. Unfortunately, I have nothing in the works right
>> now...
>>
>> Brad Henson
>>
>>
>> Ron Miller <rmiller@Brocade.COM> on 12/10/99 11:26:13 AM
>>
>> Hi Brad
>>
>> I am using HP ADS a frequency domain simulator with Impulse, a real time
>> convolution
>> to the time domain with time domain models mixed in. I started using this
>> because of the
>> problem with spice not modeling frequency dependent losses properly for some
>> cable losses.
>>
>> The ADS simulations matched the measured results very nicely. However, the
>> problem
>> with ADS is that the simulations take a long time to run when converting back to
>> the time
>> domain, so they are a bit slow and expecially when having large spice circuits
>> driving and
>> receiving the signals.
>>
>> My question is, does the W element simulations closely match the measured
>> results of
>> cable and long PCB traces?
>>
>> Thanks
>>
>> Ron Miller
>>
>
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