Hi Ken, After twenty years or so of EMC testing, I find myself more often using the word "consistent" rather than "accurate". This is exactly the issue of "n" ohm LISNs versus voltage or current probes. Current probes and voltage probes are certainly as accurate as a LISN, but they leave in doubt what source impedance the system was working into. The selection of 50 ohms is certainly debatable, especially in light of the 150 ohm specification for CDNs, and I won't even attempt to defend the number. The key is that, when we can't hope to define what's "right", we can at least attempt to define consistency.
Best regards sir, Brent DeWitt -----Original Message----- From: owner-emc-p...@ieee.org [mailto:owner-emc-p...@ieee.org]On Behalf Of Ken Javor Sent: Tuesday, December 26, 2000 7:56 PM To: Praveen Rao; 'Muriel Bittencourt de Liz' Cc: emc-p...@majordomo.ieee.org Subject: Re: Doubt with conducted emissions measurement 2) Why does Mr., Rao (or anyone else) feel that the LISN-based measurement is more accurate than a current probe measurement? I can see pros and cons to each, myself. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson: pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
