A common-mode voltage probe is an invaluable tool I have used for years to fix emission coming out of telecom-type ports, especially ethernet. I published an article in the Trans. of the IEEE EMC Symp. in Seattle, 1999 . I have mofdified it since (the old one was for 10/100 ethernet and token-ring only), but the basic idea is there, published. No cable is needed, and no radiation-type measurement is involved. Y ou just plug it into the port and measure the CM voltage of the li ne s (e.g. differential p airs in this case). If the ethernet traffic is needed for the em ission to fial, you need to force the transmitter to send idles into the CMV probe. The idesa can be eaily expanded to various types of ports, and in my opinion is much better than measuring CM currents with current probes, although in many cases one still needs to resort to using them .
Cheers, Neven ----- Original Message ----- From: "Ken Wyatt" <k...@emc-seminars.com> To: EMC-PSTC@LISTSERV.IEEE.ORG, si-l...@freelists.org Sent: Thursday, May 31, 2012 8:33:41 PM Subject: Troubleshooting Kit (Part 1) Published Hi All, I just published a few details on an EMC troubleshooting kit I use. Part 1 provides some detail on the emission tools I use. Part 2 (to be published later) will describe a few immunity tools. I'd appreciate any other thoughts or ideas you might have on tools you might use for troubleshooting. Please check it out and reply with your ideas on the Test & Measurement World blog site here ... Cheers and have a great weekend! Ken _______________________ Kenneth Wyatt Wyatt Technical Services LLC Woodland Park, CO Email Me! | Web Site | Blog Subscribe to Newsletter Connect with me on LinkedIn - ---------------------------------------------------------------- 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 < emc-p...@ieee.org > 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://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas < emcp...@radiusnorth.net > Mike Cantwell < mcantw...@ieee.org > For policy questions, send mail to: Jim Bacher < j.bac...@ieee.org > David Heald < dhe...@gmail.com > - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
