FIELD: radio engineering.
SUBSTANCE: device designed to detect pseudorandom operating frequency tuned radio stations put on the air, to take their bearings, and to determine their frequency spectrum has receiving antennas, directivity pattern control unit, memory unit, frequency meter, four channels, four amplitude detectors, heterodyne, sawtooth voltage generator, stop pulse shaper, threshold unit, division circuit, switchboard, display, four narrow-band filters, five phase inverters, eight adders, four band filters, two 90 deg. phase shifters, two multipliers, and two switches. Device incorporates provision for eliminating ambiguity in determining frequency spectrum used.
EFFECT: enhanced selectivity and noise immunity of panoramic direction-finding receiver.
1 cl, 5 dwg
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