Hello from a new member. We're wanting to run 1.5Gbps (differential) SATA signals over a backplane, and naturally have SI concerns. The distance will be up to 15". We're considering IS410 and IS620 (620 has about 2.5x less loss). I've tried using calculators from Rogers and Isola, but for some reason, they only report losses in single-ended lines. Can anyone share experiences, or suggest other tools that may be of use? Thanks!!! Michael Dunn Sr. Hardware Engineer Kaleidescape Canada Inc. 611 Kumpf Drive, Unit 100 Waterloo, ON N2V 1K8 Canada Ph: 519-772-6427 Fx: 519-772-6401 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------