Gurus, I was interested in learning more about the convergence issues in SpecctraQuest. I get quite a few of these when I simulate, with severity ranging from "Serious Convergence Error", to "jagged" waveforms, to no convergence problem at all. Does anyone have a good understanding of what causes these convergence issues and how to prevent them? A couple of theories that I have heard so far include: 1. Spectral content resonating back and forth along transmission line segments that is aliased back as noise causing the "jagged' waveforms. 2. Simulator is confused, particularly during design link, by reference designators and makes 'mistakes' in handling topology. Has anyone done work in this area to determine the cause of these convergence issues? Any help is appreciated. Thanks in advance, James R. Jones ESG Signal Integrity Dell Computer Corporation (512) 725-1809 ------------------------------------------------------------------ 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