I am new to this group, and would like to ask for some experts help. We are encounter some EMI problem on 6x PCI 33 MHz clocks. If I stagger these six clocks by 0.2 ns seconds away (assume the time margin still meets) will it help EMI ? I knew using spread spectrum will help the EMI but it not available at this moment. For multiple clocks, if I offset these clocks will help on EMI or not. Some people told me EMI is on freq domain, if freq are the same then it won't helps. My question is in time domain, if I offset the clocks won't it reduce the energy also ? If we are 2-5 db over regulation, will it help much ? Please advise, Jill ------------------------------------------------------------------ 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 FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ 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