Thanks everyone for your suggestions and comments. My initial intention was not to turn this into a tool discussion but I'm willing to learn your experience of various tools to complete a long PRBS bit pattern simulation in a reasonable amount of time. For me 2 weeks of run time on a large server farm for 10us of transient simulation is not reasonable. Regards Perry ======================================= Perry Qu Design & Qualification, Alcatel Canada 600 March Road, Ottawa ON, K2K 2E6 DID: 613-7846720 Fax: 613-5993642 Email: perry.qu@xxxxxxxxxxx ======================================= ------------------------------------------------------------------ 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