FIELD: radio engineering; information protection against unauthorized access. SUBSTANCE: device used for masking information of computer-aided control systems and electronic computers (receiving stray electromagnetic beams and pickups) by generating noise signal and effectively radiating this signal within entire band of frequencies being masked has noise generator and active antenna circuit in the form of two coupled oscillators one being inertial self-bias delayed-feedback oscillator and other, adjustable-delayed-feedback oscillator. Input of first oscillator connected to output of low-frequency noise source functions as noise-generator input and output of second oscillator loaded into transmitting antenna of magnetic-dipole type, as noise-generator output. One end of magnetic dipole is connected to generator output and other one, to common bus. EFFECT: improved operating stability of device. 2 cl, 4 dwg
