All, The 1991 version of ANSI C63.4 requires the six highest emissions within 20 dB of the limit are to be reported. If none are within 20 dB of the limit then it requires the background noise of six representative frequencies. I feel that once one has determined the maximum amplitude of the emission, it is just as easy to record the reading.
Rocky -)-(- >>> "Davis, Mike" <mike_da...@adc.com> 07/18/01 01:30PM >>> I thank you all who responded. The responses went along with what I had expected. My guess is that if you want to save a dime during the test, desperate for a test report of your compliant product, you may collect only those few data points necessary to show that the product meets the requirement(s). Or, take as many as you can use for future comparison review, analysis and test history. I find that most test labs have intentionally practiced collecting most if not all data points within 20dB below the limit. I also believe that to be a good thing. Many Non-Compliance engineers or managers find watching a testing engineer collecting numerous data points through-out the band in question hard to digest, among other things. That is just my opinion. Thanks again! -----Original Message----- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Thursday, July 12, 2001 3:42 PM To: emc-p...@majordomo.ieee.org Subject: Re: Measurement of ITE (How long should it take?) <95d210e03433d51188a60008c7169407995...@mn02exch02.adc.com>, Davis, Mike <mike_da...@adc.com> inimitably wrote: >I have a question. How many data points are required to be collected and >reported for ITE equipment for FCC Part 15 and for EN directives? Foe Europe, ALL that is required is that the Declaration of Conformity is TRUE. It's entirely up to the manufacturer (and the responsibility CANNOT be delegated) to ensure that it IS true. No more detailed requirements are imposed. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically- applied manulo-pedally-operated quasi-planar chernozem-penetrating and excavating implement a SPADE? ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ 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: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall," ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ 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: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on "Virtual Conference Hall," Kenneth P. Gonzalez Validation Manager SCI Systems, Inc. Plant 1 Technology Division, Commercial Engineering Huntsville, Al 35802 Phone (256) 882-4514 Fax (256) 882-4017
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