Hello to All I have run into an interesting problem. I am trying to put together a simple modeling environment of our 2.5Gb/s high speed digital channel using S-parameters. Because it is a differential environment, I will be using mixed-mode S-parameters. While I understand the concept of converting "S" into "T" parameters and using the chain-scattering-matrix to cascade the 2 ports of a channel, I do not know what to do when the channel is differential, and you begin with mixed-mode S-parameters. Can anyone offer a reference, or perhaps share some knowledge? Bob Welte IBM Microelectronics ------------------------------------------------------------------ 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 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