Planning to do some EMI troubleshooting with a «homemade» current probe. Probing a lot of cables inside a rack and try to find the source.
Will make a current probe by a ferrite core (two halves, a few turns wire and coax plug) as many EMI experts have posted on the web and on this forum. Then find the Zt[dBohm], so make a measurement on a cable and verify the readings on the spectrum. But when clamping on the current probe, which is a ferrite, does that change the cable impedance and therefore actually changes the real current flow, so my reading will not be true? ... or am I missing some fundamental theory here? ... #Amund - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
