A multichannel phase-sensitive detection method using orthogonal square waveforms

G. E. Harrison*, M. A. Player, P. G.H. Sandars

*Corresponding author for this work

Research output: Contribution to journalArticle

15 Citations (Scopus)


A system has been developed for the analysis of signals that vary in a linear manner with several parameters. The method allows simultaneous extraction of those parts of the signal which vary as each modulation parameter, and also any parts which depend on chosen products of the modulation parameters. The method has been used to measure small shifts of resonance frequency in molecular beam experiments, when a sensitivity approaching the limit set by shot noise has been achieved.

Original languageEnglish
Pages (from-to)750-754
Number of pages5
JournalJournal of Physics E: Scientific Instruments
Issue number10
Publication statusPublished - Oct 1971

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Physics and Astronomy(all)

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