20. - 22.02.2018
EMV 2018
Internationale Fachmesse und Kongress für Elektromagnetische Verträglichkeit


Workshop 4

Using Real-Time Spectral Analysis for Faster EMC Troubleshooting


Mittwoch, 21.02.2018, 14:00 - 17:00 Uhr


14:00 Using Real-Time Spectral Analysis for Faster EMC Troubleshooting
M.Sc. Lee Hill, SILENT Solutions LLC, Amherst, USA
This presentation will use real-world noise sources including a switch-mode power supply, motor controller, brush DC motor, digital clock sources, and Bluetooth transceivers to demonstrate how real-time spectrum analysis can make previously invisible signals appear perfectly visible and quantifiable. This provides the EMC troubleshooter with exciting new insight for fast problem solving.
This workshop will discuss the following topics:
  • Types of measurement receivers and spectrum analyzers, e.g. swept tuned, step tuned, analog IF, digital IF.

  • Impact of architecture on real-world noise measurements

  • Classification of noise signals that are commonly encountered in radiated and conducted emissions

  • "Blind time" of older architecture and modern FFT-based spectrum analyzers

  • Live demonstrations of measurements using Real-Time and non Real-Time FFT, including
    - narrow pulse Fourier spectrum
    - closely spaced line spectrum of fast risetime, repetitive pulses
    - broadband "signal under signal"
    - active Bluetooth links

This workshop will provide attendees with practical knowledge that will help them to understand the limitations of swept and step tuned EMI spectrum analyzers and test receivers in EMI troubleshooting situations. There will be at least four different hardware demonstrations of noise measurements using modern FFT-based equipment, both real-time and non real-time FFT. The noise sources will be measured from 1 MHz to 2.5 GHz from real commercial electronic products.


Mr. Lee Hill
M.Sc. Lee Hill
SILENT Solutions LLC, Amherst, USA
Lee Hill is Founding Partner of SILENT Solutions LLC, an EMC consulting firm he started in Silicon Valley in 1992, and Managing Director of Silent Solutions GmbH. Lee received his MSEE with from the Missouri University of Science & Technology EMC Laboratory. Lee teaches graduate EMC at Worcester Polytechnic Institute, and is also an EMC course instructor for University of Oxford (England. Lee is the named inventor of three US patents for EMI control. Lee chairs the IEEE EMC Symposium's annual Fundamental's program. Lee was an IEEE EMC Society Distinguished Lecturer (1994-96).