If memory serves, the difference between opt 462 IBW and 3 dB BW was a factor of 1.5. Meaning that the IBW rating of a filter originally spec'd at 3 dB points was 1.5 times the 3 dB BW.
Now if you can get one of the forum members to apply an impulse generator to an EMI receiver with 6 dB BW spec'd, then you will have all the info you need to know. Ken Javor Phone: (256) 650-5261 > From: Ken Javor <[email protected]> > Date: Thu, 17 Jun 2010 19:15:48 -0500 > To: Untitled <[email protected]> > Conversation: Spectrum analyzers for MIL-STD-461 CE101? > Subject: Re: Spectrum analyzers for MIL-STD-461 CE101? > > There are all sorts of spectrum analyzers and receivers out there with > coverage to 30 Hz. Agilent and R&S readily come to mind. The HP 8566 Opt 462 > was impulse BWs, not 6 dB. > > The difference between 3 dB and 6 dB BW will only affect BB signals, like > rectification harmonics. If you know the shape factor of the 3 dB filter > (Gaussian for the 8566) vs. the 6 dB filter, you can calculate how much extra > signal the 3 dB BW machine would report over a 6 dB BW machine. > > Ken Javor > > Phone: (256) 650-5261 > > >> From: "[email protected]" <[email protected]> >> Date: Thu, 17 Jun 2010 16:58:19 -0700 >> To: <[email protected]> >> Subject: Spectrum analyzers for MIL-STD-461 CE101? >> >> Hi, >> >> I need to rent a spectrum analyzer for performing MIL-STD-461 CE101 tests. >> Although the requirements go down to 30Hz, I only need to start at 100Hz. >> >> After sifting out analyzers with frequency range limits, and those with >> -3dB IF bandwidth specifications, I keep coming back to the venerable HP >> 8566B or 8568A with option 462 (bandwidths spec'd at -6dB). >> >> 1) For those who perform this test, what spectrum analyzers do you use? >> 2) How much different will readings be if I used equipment with -3dB IF >> bandwidth specs? >> >> TIA, >> Pat Lawler >> EMC Engineer >> SL Power Electronics Corp. >> >> - >> ---------------------------------------------------------------- >> 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]>
