We're finding challenges with some commercial auto-routers when dealing with complex boards containing many (100's to 1000's) of differential nets. In particular, a tool that obeys our SI-related constraints, such as pair-to-pair pitch, space to ground voids, etc. Anyone have a tool they'd recommend for auto-routing large PCBs that contain many differential nets? Thanks, Pat Zabinski Mayo Clinic ------------------------------------------------------------------ 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