FIELD: radio engineering, applicable for detection of going on the air of radio stations with pseudorandom retuning of operating frequency, their direction finding and determination of the spectrum of used frequencies. SUBSTANCE: masking signals coming from other directions are eliminated, detection of weak short-time signals with pseudorandom retuning of operating frequency, measurement and record of the values of their frequencies are facilitated. EFFECT: detection of weak short-time signals in loaded frequency against the background of a great number of high-power masking interferences. 4 dwg
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