I don't know which machine Derek has, but an HP4195 covers 5 Hz - 500 MHz, and it can be used in network analyzer mode, or spectrum analyzer mode. In network mode you can look at amplitude response, or amplitude and phase. If you are just wanting to measure harmonic currents drawn by some non-linear load, you could use the machine as a spectrum analyzer. It has RBW down to 1 Hz, per my recollection.
> From: [email protected] > Reply-To: [email protected] > Date: Tue, 9 Sep 2003 07:56:35 -0600 > To: <[email protected]>, <[email protected]> > Subject: RE: Using a network analyser for EN61000-3-2 6 testing > > > Interesting use of a Network Analyzer. If it is a Vector Network Analyzer this > might work. Cal it, then do an S21 measurement with Port 1 not connected. Port > 2 connects to the DUT and gives the Port 2 amplitude referenced to Port R > (equal to the incident signal). Calibrating at 0 dBm could provide a nice > reference amplitude. > > Now the VNA might not have been designed to be as robust as a Spectrum > Analyzer. It may not be as good for IP3 and all of that. I suppose one could > characterize it with a two-tone signal in the frequency range of interest. > > An oscilloscope operating in the FFT mode could work if the limited dynamic > range is acceptable. I have done this for measuring AC line harmonic currents. > > Dave Cuthbert > Micron Technology > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > Sent: Monday, September 08, 2003 8:44 AM > To: [email protected] > Subject: Re: Using a network analyser for EN61000-3-2 6 testing > > > > > > > > > When I think of a network analyzer, I think of a device that injects a > signal into a network, and then receives the signal after processing by the > network using a receiver tuned to the original frequency. This type of > network analyzer rejects harmonics. > > There are some inexpensive "network analyzers" that use broadband > detectors. These detectors receive the total signal coming out of the > network, fundamental and harmonics. > > I know that Agilent Technologies (and probably others) now make network > analyzers that can be configured to not only receive the fundamental of the > excitation, but can be set to receive harmonics and offset frequencies (for > testing mixers). > > I don't see what the advantage of using a network analyzer would be, unless > there is some information to be gained by knowing the phase of the > harmonics. > > Don Borowski > Schweitzer Engineering Labs > Pullman, WA > > > > > [email protected] > m > Sent by: To > owner-emc-pstc@ma [email protected] > jordomo.ieee.org cc > > Subject > 09/07/03 04:10 PM Using a network analyser for > EN61000-3-2 6 testing > > Please respond to > [email protected] > m > > > > > > > Hi folks, > > I was wondering if anyone had looked into using a network analyser for > measuring current harmonics? > > I have an analyser that will go down to 5 Hz, it seems a perfect instrument > for this. > > Thoughts welcome. > > Thanks, > > Derek Walton. > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
