Hi All, Well a new month and my typing fingers get restless. After an afternoon doing experiments, I have come up with some information on coupling from devices to cables in a system.
Local fields emanating from devices in a system that would normally not be a problem can induce currents in nearby cables that can cause significant problems. This month's Technical Tidbit on http://www.dsmith.org details measurements on the results of inductive coupling into a cable. The measurements show a dramatic result in terms of the amplitude of the induced current. Also shown: the relative phase between two current probe outputs (as seen on a scope or on a spectrum analyzer using a combiner) can be used to confirm the inductive mode of coupling (as opposed to the capacitive mode of coupling). Doug -- ------------------------------------------------------- ___ _ Doug Smith \ / ) P.O. Box 1457 ========= Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-----( ) | o | Email: d...@dsmith.org \ _ / ] \ _ / Website: http://www.dsmith.org ------------------------------------------------------- ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
