FreeLists / si-list / [SI-LIST] Re: Too much predicted loss

[<Aubrey_Sparkman@xxxxxxxx>]

Yang,
I agree that this issue should be discussed with Ansoft; I have always
found them to be very knowledgeable and helpful.

AND, if you don't mind, I think the list would like to hear about the
solution when you find it!


Aubrey Sparkman=20
Enterprise Engineering Signal Integrity Team
Dell, Inc.=20
Aubrey_Sparkman@xxxxxxxx=20
(512) 723-3592

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Scott McMorrow
Sent: Wednesday, July 13, 2005 8:54 AM
To: yang.you@xxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Too much predicted loss

Yang,

This is an issue that should be discussed directly with your Ansoft
applications engineer. The problem may be setup, your measurements or a
problem with the simulator.  In all of these cases, Ansoft can provide
valuable expertise.

regards,

scott

Scott McMorrow
Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
(401) 284-1827 Business
(401) 284-1840 Fax

http://www.teraspeed.com

Teraspeed(r) is the registered service mark of Teraspeed Consulting
Group LLC



You, Yang wrote:

>Hi,
>            I'm working with the SIWave software on a board with some=20
>test traces but the results of the simulation indicate about 8 db more=20
>loss than is actually seen in the lab on the actual board. I imported=20
>the board directly from the layout tool and setup the stackup but I=20
>think the dielectric layers I specified might be a little thinner than=20
>on the actual board. Would that cause more loss to show up in the=20
>s-parameters? What other factors might be contributing to this? Thanks=20
>for your help.
>
>=20
>
>Yang You
>
>=20
>
>Texas Instruments, Inc.
>
>
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