Advances in Radio Science www.adv-radio-sci.net 1684-9965 1684-9973 2 Kleinheubacher Berichte 2003 2004 10.5194/ars-2-27-2004 http://www.adv-radio-sci.net/2/27/2004/ http://www.adv-radio-sci.net/2/27/2004/ars-2-27-2004.html http://www.adv-radio-sci.net/2/27/2004/ars-2-27-2004.pdf 27 32 2005-05-27 A novel quasi-peak-detector for time-domain EMI-measurements F. Krug S. Braun P. Russer Institute for High-Frequency Engineering, Technische Universität München, Arcisstrasse 21, 80333 Munich, Germany In this paper, an advanced ultra-fast, broadband time domain EMI measurement system is described. Measurements were performed in the 30–1000MHz range. The digital signal processing of EMI measurements allows to emulate in real-time the modes of conventional analogous equipment, e.g. Peak-, Average-, RMS- and Quasi-Peak- Detector. With the presented time domain measurement system the measurement time can be reduced by a factor of 10. A novel signal recording routine for time-domain EMI (TDEMI) measurements and Quasi-Peak-Detection is described. Measurement results obtained from the investigation of a drillmachine, monitor and laptop obtained with the timedomain electromagnetic interference (TDEMI) measurement system are discussed. The results obtained with the described system have been compared with measurements performed with a conventional EMI receiver.