IPC Main Group
G01R 23/00 Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
Related Keywords
measuring FREQUENCY of ACmeasuring electric RESONANCE frequency
2 direct subcodes
Child Classifications
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- G01R 23/02 Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
- G01R 23/16 Spectrum analysis; Fourier analysis