FIELD: testing radio components during their manufacture. SUBSTANCE: device has sine-wave voltage generator 1, radio component 2, first band filter 3, rejection filter 4, second band filter 5, first and second adders 6 and 7, respectively, change-over switch 8 incorporating first comparator 9 and controlled-gain member 10, reference-voltage supply 11, RMS-to-DC voltage changer 12, second comparator 13. EFFECT: improved selectivity and precision of check. 1 dwg
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