You make it sound like I try to violate laws of nature ! :<)) Yes, if you are right, they are wrong, but the systematic error may have become part of the standard and became *the new truth*.
Once the earth was flat also..... Gert Van: Derek Walton [mailto:[email protected]] Verzonden: woensdag 11 november 2009 16:13 Aan: ce-test, qualified testing bv - Gert Gremmen CC: [email protected]; IEEE EMC & SAFETY PSTC Onderwerp: Re: AC or DC coupling in emissions measurement If I'm not mistaken, MIL STD 461F says compensate for the coupling capacitor during low frequency roll off. Are you saying they are wrong? Cheers, Derek Walton ce-test, qualified testing bv - Gert Gremmen wrote: >> One could easily "calibrate out" this kind of response in software. >> > > No you should never do that, as the input impedance will not be > 50 Ohm anymore, and the 50 Ohm is part of the measurement system. > > Gert Gremmen > Ce-test, qualified testing bv > > -----Oorspronkelijk bericht----- > Van: [email protected] [mailto:[email protected]] Namens Cortland > Richmond > Verzonden: woensdag 11 november 2009 3:11 > Aan: IEEE EMC & SAFETY PSTC > Onderwerp: RE: AC or DC coupling in emissions measurement > > Gordon, > > It would appear the AC coupling capacitor which has impedance enough at > 150 > KHz to cause 3 dB loss in the 50 Ohm circuit, but also that it's low > enough > R&S can warrant the receiver to meet published specs above 1 MHz. What > does CISPR-16 say? Does a receiver have to be flat all the way down? > One > could easily "calibrate out" this kind of response in software. > > > Regards, > > Cortland Richmond > > >> [Original Message] >> From: Gordon,Ian <[email protected]> >> >> I accept that the instrument works this way but what do the standards >> require? >> >> >> Ian Gordon >> > > - > ---------------------------------------------------------------- > 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]> > > - 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]>
