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]>
