Hi All, I have a basic query on Differential mode noise in High speed signals board. 1) As far as i understand, Differential mode noise is noise which is injected on one of the line of differential pair and the noise returns on other line of differential pair (like in PCIe3 where we inject differential mode interference for Rx circuitry BER testing). So whats the problem caused by differential mode noise as the return path is very clear for this kind of noise. 2) What is the source of differential mode noise in boards/pcb's i.e. trying to understand what sources on board can generate differential mode noise? 3) Will differential mode noise cause EMI as return path is very short? If EMI caused, what needs to be done to reduce the EMI without affecting the actual differential signals integrity. Regards Vinod A H ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu