METHOD OF CERTIFICATION OF AMPLITUDE-PHASE ERROR OF DEVICES FOR MEASUREMENT OF COMPLEX COEFFICIENTS OF TRANSMITTING AND REFLECTING OF FOUR-POLE SHF Russian patent published in 2009 - IPC G01R35/00 

FIELD: measuring technology.

SUBSTANCE: invention refers to measuring technology and can be used at control of metrological characteristics of SHF-devices. To meet this object dynamic range of amplitudes of the first test SHF-signal is divided into equal by value dynamic sub-ranges. Complex coefficients of amplification of each of sub-ranges are measured. Further, coefficients are compared by module and phase with ideal values. The amplitude-phase error is determined; the error is normalised for each certified dynamic sub-range of amplitudes. Also sub-ranges are formed by means of including discrete re-set operational amplifiers into each of two channels of a superhet receiver, coefficients of amplification of which are changed by means of switching resistors in their feedback circuits. Certification of dynamic sub-ranges is performed by means of supply of probing signals into them from an additional generator with frequency equal to intermediate frequency of the two-channel superhet receiver. Measurement of levels of probing signals is performed by comparing them in a digital form in an indicator of ratios. Certification is carried out alternately in each of two channels of the superhet receiver.

EFFECT: upgraded accuracy of measurements.

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