Sorry if this is a bit basic for this mailing list. I'm trying to simulate DDR2 terminations according to Altera's external memory interface handbook. I can't figure out why my voltage swing is so large: http://i.imgur.com/kCRSE.png I believe the swing should be 0.65 - 1.15V. Allan ------------------------------------------------------------------ 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