In message <000501c793dd$cf153ec0$d600a...@tamuracorp.com>, dated Fri, 11 May 2007, Brian O'Connell <oconne...@tamuracorp.com> writes:
>The band-pass response required by fig C.1 should be relatively simple >by use of a 'window' on the frequency-domained data. I don't think that is the optimum approach for a simple safety test. > >I have some problems with this std's concept of pink noise. The std >specs a crest factor = 3, but the concept of crest factor for pink >noise does not make sense because of the start freq and delimited >runtime. You mean that you can't measure the peak value and the r.m.s. value and take the ratio? Why not? >Also, for electrical stuff, there is no low-end delimiter to the pink >noise freq range. That's one of the effects of the filter. > >In any case, a decent discussion on pink noise, response requirements, >and DSP technique can be found at <www.firstpr.com.au/dsp/pink-noise>. Again, I think this is overkill in the context of a safety test. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex 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 emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
