FIELD: measurement technology, metrology. SUBSTANCE: invention can be used for graduation an calibration of measurement systems, specifically, of underwater acoustic and hydrophysical converters. Method consists in sequential supply of harmonic signals of various frequencies to input of measurement system. Then output signals of tested system are measured on each frequency. After this transfer function is found by way of digital processing of discrete readings of output signal. Characteristic feature of this method lies in selection of discrete readings of output signal with frequency on which ratio of digitization frequency to signal frequency is fractional number, same for all frequencies. In this case length of analyzed signal is set equal to integral number of periods of beats between digitization and signal frequencies. In particular case ratio of digitization frequency to frequency of measured signal can be specified as quotient of two numbers from Fabinacchi series. Method allows operation of analog filtration inherent in traditional methods to be avoided and measurement precision to be increased by this. EFFECT: increased measurement precision. 1 cl
