FIELD: measurement technology. SUBSTANCE: device has a frequency sweep unit, driving generator, amplitude regulator, power amplifier, vibration-testing machine, vibration transducer, matching amplifiers, phase detector, null-indicator, frequency-to-voltage converter, switches, regulating gain amplifiers, storage unit, adder, switching unit, flip-flops, decoders, recording unit, variable gain amplifiers, second adder, multiplication unit, unitary voltage source, voltage ratiometer. EFFECT: enlarged information content. 1 dwg
