Hi.all Here is 88E1043(Marvell Transceiver) receiver DC Characteristics as following defined: Vi ---input voltage a or b____675mv(min)~1725mv(max) Vidth---input differential Threshold___-50mv(min)~50mv(max) Vhyst---input differential Hysteresis__25mv(min) There is no more explanations for above parameters. I don't understand those exact meaning, Does Vi mean single ended voltage? and what's the difference between Vidth and Vhyst? Why the max Vidth is only 50mv? Thanks. ------------------------------------------------------------------ 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