METHOD TO MEASURE MULTI-SIGNAL SELECTIVITY OF STRAIGHT TRANSFORMATION RECEIVER Russian patent published in 2015 - IPC H04B17/00 

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment and may be used to estimate parameters of radioelectronic protection of a straight transformation receiver. In contrast to available methods of measurement of multi-signal selectivity of a straight transformation receiver in the invention the out-of-band harmonic oscillations are generated by means of modulation of a harmonic signal with a low-frequency signal, the frequency of which is equal to the medium frequency of the adjacent channel of the receiver at its random tuning, and frequency of the low-frequency signal is selected as equal to the pitch of the frequency separation between receiver channels, after measurement of amplitudes of combination components, a non-modulated signal is sent to the receiver's input at the frequency of receiver tuning with the same amplitude used to measure the amplitude of combination components, they measure the amplitude of the signal at the output of the receiver, and the extent of receiver exposure to combination noise is determined as ratio of amplitudes of combination components to the amplitude of the non-modulated signal at the output of the receiver.

EFFECT: technical result of the invention is increased accuracy of measurement of multi-signal selectivity of a straight transformation receiver.

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