FIELD: computer engineering. SUBSTANCE: amplitude-frequency response measurement involves subjecting entity under test to effect of set of oscillations of M preset frequencies, subjecting digital readings of entity responses obtained at 2-S (2-S is higher than or equal to M) time intervals to fast S-dot Fourier transform, followed by determining output signal modules at each of preset frequencies by level of spectral components; ratings may differ by less than width of synthesized fast Fourier transform filter characteristics. EFFECT: facilitated procedure. 4 cl, 1 dwg
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