Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:23R3
Session:
Number:23R3-3
An Overview of Emission Measurements in Time-Domain
S. Braun,
pp.681-684
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
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. 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 performed by EMI receivers. Baseband systems that allow to speed up tests by several order of magnitude are presented as well as FFT-based instruments that use a heterodyne RF-frontend to increase the bandwidth of the system. Todays and future requirements given by CISPR 16-1-1 are discussed. Solutions to fulfill such requirements are discussed. Comparison measurements between EMI receivers and timedomain EMI measurement system are shown.