FIELD: measurement equipment.
SUBSTANCE: invention can be used for frequency modulated (FM) signal nonlinear distortion measuring. Measurement method of harmonic distortion of fm signal generated by the direct digital synthesis method, consists in measuring the changes in the parameters of the central and the first side lateral component of FM signal by the spectrum analyzer during modulation entering and frequency modulation harmonic coefficient calculating on the results of measurements.
EFFECT: increase of the resolution capability of the measurement of harmonic distortion of FM signals source frequency modulation generated by direct digital synthesis method.
1 dwg, 1 tbl
