Hi All, I am designing fiber channel board. Two differential high speed PECL (Positive Emitter Coupled Logic) lines should be connected from SERDES chip to SFP (Small Form-Factor Pluggable Transceivers). I don't understand what the max. difference length between two lines should be? Thank You Edi ------------------------------------------------------------------ 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.org 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