>From a retired colleague: "A grid dip meter is an absorption oscillator where you can tune it to any frequency of interest and bring the oscillator coil in proximity of the circuit of to be measured. The meter is set up to measure the oscillator grid circuit and when an external circuit is in resonance it draws some power from the oscillator, dipping the grid." "A 'Q' meter measures the voltage peak of a directly connected tuned circuit. The LO is set to the desired frequency and to a reference output level, then the test coil/capacitor is placed in circuit and resonated and the Q is read directly from the meter."
Ralph McDiarmid, AScT Compliance Engineering Group Xantrex Technology Inc From: [email protected] [mailto:[email protected]] On Behalf Of John Woodgate Sent: Friday, February 08, 2008 2:05 PM To: [email protected] Subject: Re: Using Resonance to measure circit parameters - BNC barrel example In message <[email protected]>, dated Fri, 8 Feb 2008, Cortland Richmond <[email protected]> writes: > >Q meter? Grid Dip meter! > So I believe, but I have very limited experience of them. In any case, you can't get grids these days (and you wouldn't want to provide the necessary supplies anyway). (;-) Gate dip meter? -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk For very important information, please turn over. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
