Hi 1.) I suggest you rather check CISPR 16-1 (one) Ed.2.1 2002/ 10 on Quasi Peak Detectors / Receivers(RX). There is a new numbering system out (www.iec.ch look for Database Search CISPR 16...) I think it is now CISPR 16-1-1, 2003/11 measuring apparatus.
2.) A QP Detector is checked with certain fast rise time (<1ns) test pulses/rates (CISPR 16-1..). These short pulses have very high amplitudes and a broad spectrum (>1GHz)! The idea is basically to take the RX as a black box, connect the QP test generator to the 50 ohm antenna input and read the QP meter (with about 40dB DR). This includes overall dynamic range (DR) and non linearity...intermodulation etc and some 1kHz audio response filtering, as well as repetition rate weighting of the test pulses (tab. in CISRP 16-1). Some new work has been done at PTB EMC Lab Germany Braunschweig by Dr. Spitzer (I think only in German) on how to calibrate QP Generators/EMI receivers in a traceable way in frequency domain by using the overall RX band-filter characteristics incl. phase. This is somehow ( Pulse Amplitude!, assuming linearity? )a procedure to calibrate the QP generator. Check e.g. with R+S Munich/Memmingen DKD (equivalent to NAVLAP) EMI RX Calibration Lab. As far as I know they still have to use the QP Generator for calibration RX. I hope this helps a little. Your suggested procedure covers only partly the full check. greetings Diethard kind regards Dr. Diethard Hansen EES President, Principal Consultant, Trainer US Senior NARTE certif. EMC Eng. 001937NE EMC+Automotive+Telecom QM+techn. EA-Auditor Euro EMC SERVICE (EES) Dr.-Ing. D. Hansen POB 64, Bahnhofstr.39, CH-8965 Berikon 2, Switzerland, Swiss VAT (Mwst.)No.:323214 tel./fax: +41 566 33 73 81 German mobile phone: +49(0)1736015909 www.euro-emc-service.de [email protected] (mailto:[email protected]) Consulting+Seminars+R&D-Projects Marketing+CE-Testing+ww.Audits From: [email protected] [mailto:[email protected]]On Behalf Of Gordon,Ian Sent: Friday, April 30, 2004 12:44 PM To: 'IEEE EMC-PSTC GROUP' Subject: Verifying quasi peak measurements All Can anyone advise me as to how I might verify that the quasi peak detector of our receiver is giving accurate results, other than by sending it for calibration? I have a signal generator and also a spectrum analyser and have checked that both the receiver and spectrum analyser give an accurate indication of the signal generator output level with a pure sine wave. The two meters also indicate very similar signal levels when I apply a sine wave with 80% modulation, although the indicated quasi peak level is not significantly below the peak level. Is this sort of thing covered in CISPR 16-2 somewhere? Thanks Ian Gordon *********************************************************************** This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the BOC Group plc or any of its affiliates. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited. If you have received this email in error please return the message to the sender by replying to it and then delete the message from your computer. This footnote also confirms that this email message has been checked by anti-virus software for the presence of computer viruses. However, the BOC Group plc or any of its affiliates accepts no responsibility for any virus or defect that might arise from opening this e-mail or attachments. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ 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] 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.ieee-pses.org/ 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
