Precisely the inertia of the moving coil technology should be enough to yield a steady reading, and of course there is no rf detection going on. But make sure you don¹t cheat and use one with built-in rectification. Any such junction can detect rf.
Ken Javor Phone: (256) 650-5261 From: john Allen <000009cc677f395b-dmarc-requ...@ieee.org> Reply-To: john Allen <john_e_al...@blueyonder.co.uk> Date: Mon, 31 Jul 2017 21:17:21 +0100 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] Quasipeak definition ³Horses for courses,² then! J From: Ken Javor [mailto:ken.ja...@emccompliance.com] Sent: 31 July 2017 21:08 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Quasipeak definition Use a voltmeter of the type they used back when they designed that tractor, and you will be just fine. Ken Javor Phone: (256) 650-5261 From: "Kunde, Brian" <brian_ku...@lecotc.com> Reply-To: "Kunde, Brian" <brian_ku...@lecotc.com> Date: Mon, 31 Jul 2017 19:39:30 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG> Conversation: [PSES] Quasipeak definition Subject: Re: [PSES] Quasipeak definition I have a Classic 1948 John Deere ³M² tractor. I cannot measure the battery voltage (to see if the generator is charging the battery) while the engine is running because the emissions from the ignition is so bad it causes by DMM to malfunction. The Other Brian From: Nyffenegger, Dave [mailto:dave.nyffeneg...@bhemail.com] Sent: Monday, July 31, 2017 3:26 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [BULK] Re: [PSES] Quasipeak definition Importance: Low Yeah, I have to fix the ignition in my 69 right now. Maybe I¹ll replace the condenser while I¹m at it. -Dave From: Ghery S. Pettit [mailto:n6...@comcast.net] Sent: Monday, July 31, 2017 2:39 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Quasipeak definition True enough, but there are still automobiles out there with old, noisy, ignition systems. Heard an old VW Beetle go by lately? And to think, someone built an OATS near a freeway years ago. What were they thinking? Fortunately, the ignition system in the plane I¹m flying to dinner later this afternoon is well suppressed. We still use AM radios in airplanes for communications. Ghery S. Pettit From: John Woodgate [mailto:jmw1...@btinternet.com] Sent: Monday, July 31, 2017 11:34 AM To: 'Ghery S. Pettit'; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Quasipeak definition Do we have any products these days that produce such emissions? I¹m not sure that a 10 kHz repetition rate ever occurred anyway. For an ignition system, 3000 RPM and 4 four-stroke cylinders only gives 600 Hz. With best wishes DESIGN IT IN! OOO Own Opinions Only www.jmwa.demon.co.uk <http://www.jmwa.demon.co.uk> <http://www.jmwa.demon.co.uk/> J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. From: Ghery S. Pettit [mailto:n6...@comcast.net] Sent: 31 July 2017 19:16 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Quasipeak definition The QP detector was designed in the 1930s to simulate the response of the human ear to impulsive interference. The classic example at the time was the interference from ignition systems in automobiles to AM broadcast receivers, both in the car and nearby. A single click is well filtered by the ear and brain, but as the repetition rate goes up the perceived annoyance and interference goes up. By the time the repetition rate has reached 10 kHz the ear/brain combination is really annoyed and the quasi-peak detector and a peak detector respond about the same. Hope this helps. Ghery S. Pettit From: Paasche, Dieter [mailto:dieter.paas...@christiedigital.com] Sent: Monday, July 31, 2017 7:35 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Quasipeak definition How would you define the Quasipeak detector to somebody that is not EMC knowledgeable. Sincerely, Dieter Paasche Senior Product Developer, Electrical CHRISTIE 809 Wellington Street North Kitchener, ON N2G 4Y7 Phone: 519-744-8005 ext.7211 www.christiedigital.com <http://www.christiedigital.com> <http://www.christiedigital.com/> This e-mail message (including attachments, if any) is confidential. Any unauthorized use, distribution or disclosure is prohibited. If you have received this e-mail message in error, please notify the sender by reply e-mail or telephone and delete it and any attachments from your computer system and records. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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