Hi! In SigXplorer when you click on the stimulus setting of the driver and select CUSTOm on the right hand side the tr and tf values are displayed. Are the tr and tf values calculated by driving a standard test load because I do get the same number when I measure the rise time on the buffer delay waveform. When doing calculations using rise and fall time is it Ok to use the numbers from above. Bob __________________________________________________ Do You Yahoo!? Make a great connection at Yahoo! Personals. http://personals.yahoo.com ------------------------------------------------------------------ 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