I've found it easy to pickup dimmer-switch harmonics on an AM radio receiver.
Ralph McDiarmid, AScT Compliance Engineering Group Xantrex Technology Inc. From: [email protected] [mailto:[email protected]] On Behalf Of Derek Walton Sent: Wednesday, May 13, 2009 6:43 AM To: John Woodgate Cc: IEEE EMC Discussion Group Subject: Re: Dimmer Switch Hi John, I was choice in my words by saying harmonic rich.... Whats misleading is describing a time domain event on a SA as harmonic. 90% of the folks I talk to do not comprehend that the line on the emissions plot represents the instant an event occurs and not a discrete frequency that could be remeasured at that point. Cheers, Derek. John Woodgate wrote: > In message <[email protected]>, dated Wed, > 13 May 2009, Derek Walton <[email protected]> writes: > >> Then it's only in Europe. >> >> If you change the sweep rate you will see the interval of the spikes >> change, harmonic will not move. >> >> Try it, I just did.... > > I will, if you will do a Fourier analysis of a waveform consisting of > alternate quarter-cycles of a sine wave, so as to show, if you can, > that it doesn't have harmonics up to the infinity-eth, with amplitudes > inversely proportional to the harmonic orders. - 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]> - 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]>
