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
-
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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