John, It is straightforward but not obvious. The RF bandwidth of the various peak sensors cited ranges from 6 GHz to 40 GHz, which is much greater than the largest 40 MHz bandwidth of 802.11 signals.
Best Regards, Mike From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Thursday, August 27, 2009 1:05 PM To: [email protected] Subject: Re: Power Meter In message <7B3D1875A9A53142AB5D421EE97D0E60027BA17D@ccsexchange.ccsdomain.ccsemc.c o m>, dated Thu, 27 Aug 2009, Michael Heckrotte <[email protected]> writes: >I got an off-line question about why the video bandwidth is based on RF >bandwidth instead of something lower like the demodulated signal or the >symbol rate. Isn't it fairly straightforward? The object is to measure the **RF power**, and if the measurement is made with a bandwidth lower than that of the signal, the power indicated must be lower than it really is - some power didn't get through the bandwidth-defining filter. For DSB AM, the RF bandwidth is *twice* the modulation bandwidth. -- 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]> - 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]>
