Gabriel As I understand it, and somebody correct me if I am wrong, de-emphasis is just another term for the same concept as pre-emphasis. In most SERDES designs, it is called pre-emphasis, however, most communications guys use the term de-emphasis due to the fact that the DC gain is, "de-emphasized." Technically, it means the same thing. -Chris Brewster -----Original Message----- From: Fuentes, Gabriel [mailto:g.fuentes@xxxxxxxxx] Sent: Tuesday, February 18, 2003 10:04 AM To: [SI-LIST] Subject: [SI-LIST] De-emphasis in 3GIO Hi all. I am looking for a document describing the de-emphasis technic used in the 3GIO physical layer. I need to understand how does it works, how it helps to reduce ISI, etc. I understand the Tx pre-emphasis in RS-485 communications, but I have not been able to deduce de de-emphasis in PCI-E Gabriel ------------------------------------------------------------------ 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 ------------------------------------------------------------------ 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