Development of a multiresolution time domain EMI measurement system that fulfills CISPR 16-1

Braun, Stephan; Aidam, Martin; Russer, P.

doi:10.1109/isemc.2005.1513545

Cited by 21 publications

(3 citation statements)

References 2 publications

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“…During the last years reasearch has been performed on time-domain emi (TDEMI) measurement systems [1]. It has been shown that by a multiresolution TDEMI measurement system sufficient high dynamic range is achieved [2], [3]. By real-time implementation of the digital signal processing on field programmable gate arrays (FPGAs) the measurement time for a single scan has been reduced by a factor of 2000 [1] in the CISPR Band C,D.…”

Section: Introductionmentioning

confidence: 98%

Development and Evaluation of a Realtime Time-Domain EMI Measurement System for Automotive Testing

Braun

Aidam

Russer

2007

2007 IEEE International Symposium on Electromagnetic Compatibility

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Time-domain EMI Measurement Systems allow to reduce the measurement time by several orders of magnitude. In this paper a realtime time-domain emi measurement system for automotive testing is presented. Automotive tests require smaller frequency bins and a smaller IF-Bandwidth. In frequency domain such measurements take extremely long, sometimes they exceed the life-time of a component. A novel real-time time-domain emi measurement system is presented that reduces the time for automotive measurements by a factor of 8000. By a numerical oscillator in the signal processing unit the picket fence effect is reduced. Measurements have been performed on components and on a complete vehicle in the frequency range 30 MHz -1 GHz. The real-time time-domain emi measurement system has been evaluated and assessed in a automotive test environment.

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Section: Introductionmentioning

confidence: 98%

Development and Evaluation of a Realtime Time-Domain EMI Measurement System for Automotive Testing

Braun

Aidam

Russer

2007

2007 IEEE International Symposium on Electromagnetic Compatibility

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“…An algorithm for the quasi-peak detector mode has been presented in [7]. With both algorithms almost all requirements that are given by CISPR 16-1-1 had been fulfilled [8],except continuous processing which is mandatory to provide a gapless IF signal.…”

Section: Introductionmentioning

confidence: 99%

Spectrum analysis and EMI measurements based on time-domain methods

Braun¹

2010

15th Conference on Microwave Techniques COMITE 2010

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Measurements of electromagnetic interference in time-domain allow to reduce the scan time by several orders of magnitude, in comparison to automated scans performed by the tuned selective voltmeters, which are known as EMI receivers. Spectrum analyzer are used for frequency selective measurements of signals. Such analyzers can perform fast sweeps or scans over large bands. A drawback of spectrum analyzers is the long sweep time, when a high frequency resolution is required.In this paper an overview of methods and systems is shown which perform the measurement in time-domain and use the short-time fast Fourier transform for the calculation of the spectrum rather than a sequential measurement. Baseband systems allow to speed up scans by several orders of magnitude. Systems with a broadband downconversion and a broadband analog-to-digital converter system allow to extend the frequency range beyond the Nyquist frequency of todays availabe ADCs. Powerful Short-time fast Fourier transform processors allow to process several frequencies at the same time. A gapless processing allows to analyze unstationary signals as well as small narrowband signals.

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“…It has been shown that by a multiresolution EMI measurement system sufficiently high dynamic range is achieved [3], [4]. By realtime implementation of the digital signal processing on field programmable gate arrays (FPGAs) the measurement time for a single scan has been reduced by a factor of 2000 [2].…”

Section: Introductionmentioning

confidence: 99%

Automated measurement of intermittent signals using a time-domain EMI measurement system

Slim

Braun

Gulten

et al. 2009

2009 IEEE International Symposium on Electromagnetic Compatibility

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Traditionally emission measurements are carried out in frequency domain using pre-and final scans. Time-domain EMI measurement systems allow to reduce the scan time by orders of magnitude, enabling novel test methods. In this paper the measurement uncertainty for intermittent signals during preand final scans is investigated. The effect of the dwell time on the measurement accuracy in the peak and quasipeak detector modes is shown. For conducted emission measurements two test procedures are presented. First method that performs a separate evaluation according to the phase of the LISN, and a second method that performs full maximization. Both methods are used for automated measurement of intermittent and narrowband drifting signals. The total test time is reduced by at least one order of magnitude. Intermittent and narrowband drifting signals, which are still measured today manually, can be measured by the presented procedure automatically. Measurements have been carried out in the frequency range 9 kHz -1 GHz.

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Development of a multiresolution time domain EMI measurement system that fulfills CISPR 16-1

Cited by 21 publications

References 2 publications

Development and Evaluation of a Realtime Time-Domain EMI Measurement System for Automotive Testing

Development and Evaluation of a Realtime Time-Domain EMI Measurement System for Automotive Testing

Spectrum analysis and EMI measurements based on time-domain methods

Automated measurement of intermittent signals using a time-domain EMI measurement system

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