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Related Experiment Videos

Effect of mains interference on time coherent averaging.

J Strackee1, A Peper

  • 1Laboratory for Medical Physics & Informatics, University of Amsterdam, The Netherlands.

Medical & Biological Engineering & Computing
|September 1, 1992
PubMed
Summary

Mains interference significantly impacts time coherent averaging, even with internal triggers. This study demonstrates that averaging cannot eliminate this interference, affecting signal integrity.

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Area of Science:

  • Signal Processing
  • Electrical Engineering
  • Physics

Background:

  • Time coherent averaging is crucial for signal analysis.
  • Mains interference poses a challenge in sensitive measurements.
  • Internal triggers are commonly used in signal acquisition systems.

Purpose of the Study:

  • To investigate the impact of mains interference on time coherent averaging.
  • To analyze the effects of time jitter caused by interference.
  • To quantify the deformation of signals due to this jitter.

Main Methods:

  • Derivation of the general distribution of time jitter.
  • Application of the derived jitter distribution to a simplified signal model.
  • Computation of the deformation on a step signal.

Main Results:

  • Mains interference introduces time jitter that affects coherent averaging.
  • The derived jitter distribution characterizes the interference's impact.
  • Averaging does not remove the interference-induced jitter.
  • Signal deformation, particularly on step signals, was quantified.

Conclusions:

  • Mains interference is a fundamental limitation for time coherent averaging with internal triggers.
  • The derived jitter distribution provides a tool for predicting signal deformation.
  • Mitigation strategies may be necessary to overcome this interference in precise measurements.

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