Hello All , When we get any package model extracted , it gives us the coupling values at certain frequency. A digital signal always has many harmonics of a fundamental frequency and hence all those frequency components are important. Which frequency is appropriate for package model extraction then? Also if we use s-parameter model , does the simulator tool take into account the s parameter values at multiple frequencies and come up with the appropriate coupling values ? Regards Amit ------------------------------------------------------------------ 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