FIELD: signaling apparatuses warning the inhabitants on danger of natural calamity. SUBSTANCE: the device has a radio transmitter, multivibrator, level detectors, sensing elements, relays, output relay, resistor, power supply, master oscillator, Morse key, modulating code generator, phase manipulator, transmitting antenna, radio receiver, receiving antenna, search unit, mixers, spectrum width meters, amplitude detectors, calibration oscillator, controlled phase shifters, subtracter, low-pass filter, phase detectors, sign inverters and a control element. EFFECT: enhanced noise immunity of radio receiver due to elimination of non-identity of receiving channels by using the amplitude-phase modulation for identification, provided reception of trustworthy messages. 10 dwg
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