Hi, I wrote about this in an article a few years ago: http://pcdandf.com/cms/component/content/article/171-current-issue/7504-signal-integrity- See sections called "Output guaranteed timing" and âPropagation Delayâ. Regards, Istvan Nagy -----Original Message----- From: Balamanikandan K Sent: Wednesday, December 04, 2013 5:09 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] timing calculation Real board Vs Test load Hi, Timings specified in datasheet are for particular loading (eg: 10pf loading). When we have a real board in post layout, how can we measure the timings using SI simulation tool? How to utilize the datasheet values for real board measurement? Please clarify. -- Best Regards, Balamanikandan.K ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu