Thanks! Now to go try that!
Attitude is Mind over Matter. If you don't Mind, it doesn't Matter... This email has been displayed using 100% recycled electrons and 100% pure virgin photons. --- On Tue, 2/1/11, Charlie Blackham <[email protected]> wrote: > From: Charlie Blackham <[email protected]> > Subject: RE: [PSES] EN 302 208-1, v1.3.1 > To: "'Bill Owsley'" <[email protected]>, [email protected] > Date: Tuesday, February 1, 2011, 12:14 PM > Bill > > Keep 8.4 and 8.5 separate - they are measuring 2 different > things: > > The -46 dBm that is part of the spectral mask ion 8.4 is > obtained with an > Averaging detector. > > When measuring Spurious emissions, perform a "pre-scan" > using the stated BW > and run measurement up to the Band Edge: > - if you pass the Spurious Emissions limit at band edge, > great. > - if you don't pass the limit, you need to measure the > power in the > "Bandwidth" immediately adjacent to the Band Edge. You can > do this by using > a lower BW and summing the power over the required > bandwidth - the "Channel > power" facility on your receiver will do this for you if > you centre it BW/2 > above or below the band edge. This test method isn't cited > for this > particular clause, but is referenced in Step 10 of 10.2.2 > and used when > testing other types of device. > > Regards > Charlie > > > > > -----Original Message----- > From: Bill Owsley [mailto:[email protected]] > > Sent: 01 February 2011 16:01 > To: 'Bill Owsley'; [email protected]; > Charlie Blackham > Subject: RE: [PSES] EN 302 208-1, v1.3.1 > > Ok. > > So the next question refers to 8.5.1, the definition. > > "Spurious emissions are emissions at frequencies other than > those of the > wanted carrier frequency and its sidebands > associated with normal test modulation." > > And two questions mixed together. > - modulation sidebands outside of the +/- 500 kHz band > - RBW over lapping into the excluded +/- 500 kHz band. > > Using 6.6 settings, and assuming that the instrument > centers the RBW window > on the frequency just outside of the band edge, half of the > RBW is receiving > signals from the modulation sidebands from inside the > excluded band. > > The limit inside the band is -46 dBm > and outside the band it is -36 dBm. > > However the difference in the measuring RBW, inside to > outside the band, 1 > kHz to 100 kHz, is 20 dB. > > Thus there would need to be a 10 dB margin just inside the > band edge in > order to pass just outside the band edge, due to the change > in RBW. > > Or, the measuring frequency near the band edge could be > moved just enough to > account for half of the RBW, so that the measured energy is > not from inside > the band. > > Or, the modulation sideband emissions outside of the > defined band can be > ignored. > > Thoughts ??? > > - Bill > > Attitude is Mind over Matter. > If you don't Mind, it doesn't Matter... > This email has been displayed using 100% recycled electrons > and 100% pure > virgin photons. > > > > --- On Tue, 2/1/11, Charlie Blackham <[email protected]> > wrote: > > > From: Charlie Blackham <[email protected]> > > Subject: RE: [PSES] EN 302 208-1, v1.3.1 > > To: "'Bill Owsley'" <[email protected]>, > [email protected] > > Date: Tuesday, February 1, 2011, 4:21 AM > > Bill > > > > 8.4.2 gives Receiver settings to measure Spectral > > Mask - these are > > applicable only to Spectral Mask and shouldn't be used > for > > Spurious > > Emissions. > > > > Section 8.5.2 is poorly worded, but I read it as > follows: > > > > 8.5.2.1 is Conducted Spurious Emissions and RBW/VBW > are set > > as per Clause > > 6.6 (step 2) > > > > 8.5.2.2, Radiated Spurious Emissions, step 5 > references > > Table 2 (which is > > Clause 6.6). > > > > (Note: exact tests required depends on whether antenna > is > > integrated or not > > as per opening para of section 8.5.2) > > > > Regards > > Charlie > > > > > > -----Original Message----- > > From: Bill Owsley [mailto:[email protected]] > > > > Sent: 31 January 2011 19:27 > > To: [email protected] > > Subject: [PSES] EN 302 208-1, v1.3.1 > > > > Calling all Radio experts... > > > > Section 8.4.2, Method of Measurement, > > step 3 defines equipment settings. > > > > Now go to 8.5.2.1, Method of measuring into a > specified > > load. > > Not much different from the above 8.4.2, but... > > no step defining equipment settings. > > But in 8.5.2.2, radiated, it does define the > settings. > > > > Considering that 8.4.2 has a definition, can that be > > carried over to 8.5.2.1 > > for those measurement since they are both conducted > into > > specified loads? > > Where the next section, 8.5.2.2, is radiated > measurement. > > > > Thanks, > > - Bill > > > > > > Attitude is Mind over Matter. > > If you don't Mind, it doesn't Matter... > > This email has been displayed using 100% recycled > electrons > > and 100% pure > > virgin photons. > > > > > > > > > > > > - > > > ---------------------------------------------------------------- > > 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://product-compliance.oc.ieee.org/ > > 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://product-compliance.oc.ieee.org/ 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]>
