Uncertainty for modulation parameters of depth or pulse on-off ratio and time duration? Uncertainty applies to things like field intensity, where the construction of the room or OATS and near field effects combine to provide significant uncertainty.
But something easily measured with an o'scope of modest (audio) performance? That is a totally unwarranted extension of the concept. Ken Javor Phone: (256) 650-5261 > From: Deniz Demirci <[email protected]> > Date: Tue, 10 Aug 2010 08:55:27 -0700 > To: Ken Javor <[email protected]>, Untitled <[email protected]> > Conversation: Calibration supplier for signal generator with pulse modulation > Subject: RE: Calibration supplier for signal generator with pulse modulation > > Is there an acceptable method in any immunity standards, or the tolerance > specified anywhere for checking the modulation? > You need to come up with an uncertainty number if you are performing a > compliance test. > It should be pretty painful if you are not a ISO 17025 calibration laboratory. > > OOO (Own opinions only) > > Best regards, > > Deniz Demirci > National Technical Systems (NTS Canada) > Phone: 403-568-6605 ext 244 > fax: 403-568-6970 > email:[email protected] > web: http://www.ntscorp.com/about/locations > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of Ken Javor > Sent: Tuesday, August 10, 2010 9:39 AM > To: Untitled > Subject: Re: Calibration supplier for signal generator with pulse modulation > > Amplitude and pulse modulation parameters are adequately checked with a > calibrated o'scope. > > And even frequency could be checked with your EMI receiver, assuming it is > calibrated. > > Ken Javor > > Phone: (256) 650-5261 > > >> From: Deniz Demirci <[email protected]> >> Date: Tue, 10 Aug 2010 08:30:17 -0700 >> To: Untitled <[email protected]> >> Conversation: Calibration supplier for signal generator with pulse modulation >> Subject: RE: Calibration supplier for signal generator with pulse modulation >> >> The amplitude of signal source may not need calibration because you calibrate >> the field at the end with calibrated probes. >> You should at least check or get the signal generator calibrated if your >> verification procedure is not checking (characterizing) the modulation. >> EN 61000-4-3 gives some hints about amplitude modulation but the other >> modulation types can be difficult to measure (Pulse, burst, phase etc.) >> >> OOO (Own opinions only) >> >> Best regards, >> >> Deniz Demirci >> National Technical Systems (NTS Canada) >> Phone: 403-568-6605 ext 244 >> fax: 403-568-6970 >> email:[email protected] >> web: http://www.ntscorp.com/about/locations >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On Behalf Of Ken Javor >> Sent: Tuesday, August 10, 2010 7:05 AM >> To: Wendy Nya; Untitled >> Subject: Re: Calibration supplier for signal generator with pulse modulation >> >> Why would the signal source need calibration? Normally, it is the signal >> measurement devices that require calibration. Further, this signal source >> likely requires some amplification in order to provide the required signal >> for EMI testing, so that it is the amplified output which must be measured, >> not the signal generator itself. >> >> Ken Javor >> >> Phone: (256) 650-5261 >> >> >>> From: Wendy Nya <[email protected]> >>> Date: Tue, 10 Aug 2010 01:23:29 -0700 (PDT) >>> To: <[email protected]> >>> Subject: Calibration supplier for signal generator with pulse modulation >>> >>> Dear All, >>> >>> I am looking for a calibration supplier that can provide accredited service >>> for >>> AR SG6000. It has built-in pulse modulation option (for Radiated Immunity >>> use). >>> >>> By the way - Is anyone using this model? It seems to be OEM from Agilent (it >>> came in an agilent box) but the equipment is marked AR >>> and works with Agilent N5181A driver. Agilent is saying that it is not able >>> to >>> provide accredited calibration service for this model. >>> >>> Thanks & Regards, >>> Wendy Nya >>> >>> >>> >>> >>> - >>> ---------------------------------------------------------------- >>> 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]> > > - > ---------------------------------------------------------------- > 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]>
