[SI-LIST] Re: X-talk
- From: Abdulrahman Rafiq <arafiq@xxxxxxxxx>
- To: esayre3@xxxxxxxx
- Date: Fri, 15 Apr 2005 11:05:47 -0700
Granted xtalk is a subjective matter, where acceptablity is determined board
to board. However there is a general understanding of what are acceptable
xtalk margins on most boards, i.e. generalized guidlines. I think this is
what Jayaprakash was trying to ask
Abdulrahman Rafiq
Ed Sayre III wrote:
Jayaprakash, I agree with Scott, moreover, xtalk is very subjective to the
edge=20 rates/frequencies you are running. Also, if you are looking at xtalk
in a= =20 model form, make sure the model is accurate to your needs. Lastly,
make=20 sure you understand which xtalk you are worried about as they apply
to your= =20 topology and architecture. Regards -Ed
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NORTH EAST SYSTEMS
ASSOCIATES,INC -------------------------------------=20 "High Performance
Engineering &Design" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dr.
Edward Sayre 3rd e-mail: esayre3@xxxxxxxx[1] NESA, Inc.
http://www.nesa.com/[2]235 Littleton Rd, Unit 2 Tel +1.978.392-8787
Westford,MA 01886 USA Fax +1.978.392-8686
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ At 09:37 AM 4/15/2005 -0400,
Scott McMorrow wrote: Jayaprakash, That is a design decision that only you
oryour board designer can decide. There are numerous articles in the
literature that discuss this, and numerous standards documents that include
crosstalk in their margin analysis. The PCI-X specification comes to mind as
one that attemped to cover all noise sources in it's margin analysis.
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[3] Teraspeed=AE is the registered service mark of
Teraspeed Consulting Group LLC Jayaprakash wrote: Hi, What is the acceptable
margin for cross talk in standard products? In other words, How impending
cross talk problem is caught in simulations? Thanks, Kind regards,
Jayaprakash. Balachandran Jayaprakash Celestijnenlaan, 3/61, 3001, Heverlee,
Leuven, Belgium. Mobile: +32-472-630120 Send instant messages to your online
friends= http://uk.messenger.yahoo.com[4]
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