Placing the branch as close as possible to the destination devices will maximize this topology. It keeps the ratio of the length of the stubs vs. the length from the series termination to the split larger. Keep the two stubs equal in length and as short as possible. +----> receiver A driver | >--/\/\/\----------------------------------------+ | +----> receiver B A good example of balanced 'T' topology can be found in Intel's DIMM Specification. You can download it from their developer ftp site at the following link: ftp://download.intel.com/technology/memory/unb_001.pdf Regards, Ken Ken Patterson Senior Hardware Engineer Laurel Networks, Inc Omega Corporate Center 1300 Omega Drive Pittsburgh PA, 15205 PH: (412)809-4200 ext. 4223 email: pattken@xxxxxxxxxxxxxxxxxx Visit Laurel Networks at www.laurelnetworks.com -----Original Message----- From: kevinlfitzgerald [mailto:kevinlfitzgerald@xxxxxxxx] Sent: Friday, April 12, 2002 11:12 AM To: si-list@xxxxxxxxxxxxx Subject: [SI-LIST] Terminating a branched clock line Hi, I have a clock signal with a 1ns rise time which is distributed to 2 parts. The 50 Ohm lines are matched length within +/-50 thou after the branch. Our concern lies with the source termination. Should the source termination be before the branch, or immediately after the branch ? Any thoughts, Thanks, Kevin ------------------------------------------------------------------ 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