Dear esteemed colleagues, CISPR 11 test procedures for making radiate emissions measurements at frequencies above 1GHz dictates that measurements are performed only at 30 degree intervals around the microwave appliance. From my own experience, this does not capture the highest emissions from the microwave oven, and often will allow it to “pass” the emissions test when there are emissions that are higher than the specified limit at angles from the EUT that is not recorded using this methodology.
I expect the procedure was written to save time in testing, but how can I, in good conscience, write a passing test report when I know the EUT fails to meet the limit for radiated emissions at angles other than the 30 degree increments recorded? Can anyone give me some background on why this test method was written into the standard? Am I miss-interpreting the procedure? Bill Stumpf D.L.S. Electronic Systems, Inc. - ---------------------------------------------------------------- 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]>
