Hi, Does anyone know electromagnetic (or electric) coupling between circuits in close proximity could result in Amplitude Modulation (AM) of a data signal (where the carrier is the harmonics of "square-wave" clock signal)? I know mutual inductance and capacitance may cause crosstalk between two adjacent wires. But that's not modulation. How does the signal ride on the harmonics of clock and get propagated in the air? Cheers, Huiyun Li ------------------------------------------------------------------ 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