I'm trying to quantify the amount of SSO noise which is contributed by the pc board power delivery system (vias, decoupling, stackup), with the goal of separating this noise from the SSO noise which is contributed by the device and its package. Has anyone attempted to measure this effect, and if so, what would be a good technique? I have two boards available, one with devices populated and the other with some BGAs depopulated, so I have access to the vias. Thanks and regards, Fabrizio Zanella Principal Hardware Design Engineer Broadbus Technologies -------------------------------------------------------- This email message and any files transmitted with it contain confidential information intended only for the person(s) to whom this email message is addressed. If you have received this email message in error, please notify the sender immediately by telephone or email and destroy the original message without making a copy. Thank you. ------------------------------------------------------------------ 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