If you accept that both ISI and crosstalk is a bounded phenomenon, you have to question the need to simulate in a statistical way like PBRSn approach. A small set of patterns near the boundary should give you results as good as simulating millions of cycles in PBRS. Even if you don't buy the LTI assumption, you can get higher order pattern that approaches LTI. As for crosstalk, if they are small enough to assume LTI, the same peak distortion approach will get you the boundary just as ISI except you may have to sweep between the ISI and the xtalk pattern across the UI if they are asynchronous. As for the true Rj (which I believe is always small but mixed into other bounded uncorrelated noise like xtalk. If you don't believe me, show me a system that really takes an error every 10exx cycle) I will not do it in HSPICE but color the PDF with the channel or whatever PLL jitter transfer function and generate the statistical eye post worst case eye closure. Chris Cheng Distinguished Technologist , Electrical Hewlett-Packard Company +1 510 413 5977 / Tel chris.cheng@xxxxxx / Email 4209 Technology Dr Fremont, CA 94538 USA -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Tesla Sent: Monday, July 04, 2011 12:43 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] How many simulated bits are confident using HSPICE generating eyediagram. Hi All, I will simulate a Multi-Gigabit Serial Link(10Gbps) using HSPICE. I want to generating eye diagram as the final result, But i don't know how many bits to run ? Can someone give me some hints? Best Regards. ------------------------------------------------------------------ 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 technical documents are available at: http://www.si-list.net 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 technical documents are available at: http://www.si-list.net 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