Journal article

A sound card based multi-channel frequency measurement system

  • Groeger, Stephan Physics Department, Université de Fribourg, Switzerland - Paul Scherrer Institute, Villigen, Switzerland
  • Bison, Georg Physics Department, Université de Fribourg, Switzerland
  • Knowles, Paul E. Physics Department, Université de Fribourg, Switzerland
  • Weis, Antoine Physics Department, Université de Fribourg, Switzerland
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    2006
Published in:
  • The European Physical Journal: Applied Physics. - 2006, vol. 33, p. 221-224
English For physical processes which express themselves as a frequency, for example magnetic field measurements using optically-pumped alkali-vapor magnetometers, the precise extraction of the frequency from the noisy signal is a classical problem. We describe herein a frequency measurement system based on an inexpensive commercially available computer sound card coupled with a software single-tone estimator which reaches Cramér-Rao limited performance, a feature which commercial frequency counters often lack. Characterization of the system and examples of its successful application to magnetometry are presented.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Computer science and technology
License
License undefined
Identifiers
  • RERO DOC 5820
Persistent URL
https://folia.unifr.ch/unifr/documents/299999
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