Chris Maxwell <[email protected]> wrote (in <[email protected]>) about 'EMC Ethics', on Tue, 19 Jul 2005:
>I've worked with a few labs over the last 9 years. At some labs, I >don't trust marginal data, at one I do...why? Because at that lab, if >there is a frequency that is passing by a dB or so...they do everything >they can in order to maximize the signal...they move cables, they raise >the antenna up and down, they rotate the table. It's nerve wracking to >watch as readings come up time and time again...all so close to the limit. That's all very well, but it only applies to the configuration and collection of peripherals, if any, that is under test, with ground plane, bundled cables etc. Is it REALLY appropriate to be so meticulous over that configuration, when the product in the field will never be operated like that? And do they also adopt the same procedure if the product FAILS by 1 dB (to find whether it is just one peripheral, or one critical and improbable arrangement of the cables that increases the emission by, say, 3 dB) or are they simply intent on failing it if at all possible? -- Regards, John Woodgate, OOO - Own Opinions Only. Deadlines are 90% of deadliness. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.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: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
