METHOD MEASURING NONPRIMARY RADIATIONS OF RADIO TRANSMITTERS

摘要

FIELD: radio engineering, measurement of nonprimary radiations of radio transmitters, exciters, synthesizers. SUBSTANCE: for decrease of influence of powerful carrier on result of measurement of nonprimary radiation of low level spectrum of nonprimary radiations is transferred to zero frequency by way of multiplication of radio signal from output of radio transmitter with auxiliary harmonic signal which frequency and phase values are equal to frequency and phase values of carrier of radio transmitter. Multiplication result is filtered and level of nonprimary radiations on frequencies corresponding to frequencies of tuning out of nonprimary radiations from frequency of carrier of radio transmitter is measured by measurement receiver. Method allows level of nonprimary radiation with very small tunings away (less than 2-3%) from carrier to be measured. EFFECT: reliable measurement of level of nonprimary radiations. 1 dwg