Off-topic response. Grinding an axe. Clearly the network analyzer itself serves as a limit on the achievable uncertainty, but it should be much better than what is needed (+/-20% in the military world). That aside, consider that differential mode emissions tend to be low impedance relative to that of the LISN, and therefore act as voltage sources, whose amplitude doesn¹t correspond much to changes in LISN amplitude. Common mode emissions tend to be current sources and therefore common mode emission amplitudes track closely with changes in LISN impedance. But we don¹t measure these modes separately, but rather as vector sums on the phase conductor, and vector differences on neutral, so we have no idea what the effect of the LISN impedance on any particular emission measured actually is.
Ken Javor Phone: (256) 650-5261 From: Mac Elliott <00000a115b29e815-dmarc-requ...@ieee.org> Reply-To: Mac Elliott <mac_elli...@yahoo.com> Date: Mon, 11 Sep 2017 16:32:09 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] LISN Calibration Measurement Uncertainty All, We are interested in doing some in-house LISN calibrations (impedance verification only using network analyzer) and need to develop an uncertainty budget. Does anyone happen to have a budget you could share with us? We will go through the exercise of calculating ourself but if there is one out there would appreciate it if you could share. Have a great day Mac Elliott - ---------------------------------------------------------------- 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://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 <sdoug...@ieee.org> 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://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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
