In message <c630442d.4265c%[email protected]>, dated Wed, 13 May 2009, Ken Javor <[email protected]> writes:
>Have to admit to being confused by the Woodgate-Walton discussion. The >way I see it, the dimmer switch is indeed generating a harmonic rich >signal. The spectrum analyzer, due to the required EMC bandwidths, >doesn't show each individual harmonic - the bandwidth is wider than the >harmonic spacing. Therefore the dimmer switch is creating what appears >to be broadband noise, as long as your reference point is audio >frequency bandwidths necessary for radio communications, and by >extension EMI measurements. I agree. The harmonics are there, whatever you can or can't see on the SA display. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
