Vincent, Signal integrity may be affected also by ground bounce, noise coupling, power integrity, and signal crosstalk, which may be different on your test bench than in your final system configuration ( backplane and chassis). You may need to evaluate these additional mechanisms on both test bench and system. I anyone is interested, I will present a paper at DesignCon 2010 addressing these issues. Cosmin Iorga, NoiseCoupling.com http://www.noisecoupling.com ________________________________ From: Vincent Zeng <vincent_zng@xxxxxxxxx> To: si-list@xxxxxxxxxxxxx Sent: Friday, October 30, 2009 1:53:47 PM Subject: [SI-LIST] signal integrity on different configuration someone may had this problem before. I appreciate if you can share something with me. I found the singal degradation is different on test bench with I/O card configuration with on the final configuration (like backplane or chassis). My question is how can I get correlation between these two configurations in terms of the signal integrity? best regards Vincent ------------------------------------------------------------------ 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 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 ------------------------------------------------------------------ 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 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