Hello Scott/all, just to shortly correct - yes, you are right, Hot-Stage EMI/PI does not do a spartial analysis to compute the impedance and power distribution on any point of the plane - but I disagree that you can do this easily (and quickly) using a spreadsheet - its a rather complex thing to compute the power-bus impedance properly - and that's what Hot-Stage PI is doing - to allow then quickly analysis of the Power-Bus and to identify noise sources (rather then to match 100 % any kind of test bench) - the approach is following the work of the group of Prof. Hubing at UMR (http://www.emclab.umr.edu/consortium/) and is proven to be applicable for a quick and efficient EMI and Power Integrity analysis - as discussed in another thread, it depends all times what you wanna want to do (and I like the Sigrity approach even as well - complete different discussion). And the next version of HS-PI will compute the values on any point within power planes Just to clarify - kind regards Ralf Bruening Product Manager High Speed Design/Partner & Solution Business Zuken EMC Technology Center Vattmannstr.3 33100 Paderborn Germany Tel: ++49 (0) 5251 150 600 (direct -621) Fax: ++49 (0) 5251 150 700 Cellular: +49 170 4228512 (alternative: +49 172 9070675) Email: ralf.bruening@xxxxxxxx Web: www.zuken.com _____________________________________________ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any other use of the email by you is prohibited. Friday, May 14, 2004, 4:02:14 AM, you wrote: WS> A quick look at Hotstage PI datasheet it appears that there is no = WS> spatial analysis. I can do the same in a spreadsheet. Sigrity takes into = WS> account the board geometry and allows you to look at power distribution = WS> impedance spatially. It's easier to use than it use to be. WS> Scott Westbrook... WS> Network Appliance ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu