I've seen/heard this doing injection at audio. Expect that if your rf clamp is singing at the modulation frequency, suggest that is a saturation phenomenon causing the physical movement.
Ken Javor Phone: (256) 650-5261 From: Rick Goodwin <[email protected]> Reply-To: Rick Goodwin <[email protected]> Date: Wed, 5 Aug 2020 14:53:46 -0400 To: <[email protected]> Subject: [PSES] "Singing probe" Hello, A question for the experts. While doing an automotive BCI test, the injection probe started "singing". During the test around 56-60 MHz while applying the standard AM 1 kHz 80% modulation, I could hear a tone at about 1 kHz. This only occurred on some of the cables, not all. Granted the DUT has a higher cable density and draws more power than I'm used to doing, but I have been doing this type of testing for quite a few years and have never experienced this before. Has anyone ever seen (heard) this before? Regards, Rick Goodwin - ---------------------------------------------------------------- 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) <http://www.ieee-pses.org/list.html> 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]> - ---------------------------------------------------------------- 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]>
