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PCE
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DIFF Subgroup
G01R 23/14

by heterodyning; by beat-frequency comparison

Introduced: September 1968

Full Title

Arrangements for measuring frequencies; Arrangements for analysing frequency spectra > Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage > by heterodyning; by beat-frequency comparison

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.

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