METHOD FOR MONITORING AMPLITUDE-FREQUENCY CHARACTERISTIC OF FILTER

摘要

FIELD: physics.;SUBSTANCE: invention relates to controlling electric signal frequency filter parameters. In particular, the method is intended for production control of compliance of the mono-tone amplitude-frequency characteristic (AFR) of a band-pass filter with design documentation requirements. Essence: input signal of filter of constant amplitude is successively supplied in time with three frequencies, values of which correspond to resonant frequency and lateral frequencies determined by pass band of ideal filter. Measuring data are used to calculate relative coefficients of filter transfer at lateral frequencies of input signal and value of their difference from first production tolerance. Filter transfer coefficient is calculated at the frequency of the input signal equal to the resonant frequency of the ideal filter. Value of difference between calculated coefficient of filter transfer and transmission coefficient at resonant frequency of ideal filter is compared. Result difference is compared with the second production tolerance.;EFFECT: technical result is simplification, shorter time of control, high information value when monitoring mono-amplitude-frequency characteristic response of band-pass filter.;1 cl, 1 dwg