CPC Subgroup
G01R 23/16 Spectrum analysis; Fourier analysis
Full Title
Arrangements for measuring frequencies; Arrangements for analysing frequency spectra > Spectrum analysis; Fourier analysis
8 direct subcodes
Child Classifications
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- G01R 23/163 adapted for measuring in circuits having distributed constants
- G01R 23/165 using filters
- G01R 23/17 with optical auxiliary devices
- G01R 23/173 Wobbulating devices similar to swept panoramic receivers
- G01R 23/175 by delay means, e.g. tapped delay lines
- G01R 23/177 Analysis of very low frequencies
- G01R 23/18 with provision for recording frequency spectrum
- G01R 23/20 Measurement of non-linear distortion