DEVICE FOR DETERMINING FREQUENCY, TYPE OF MODULATION AND KEYING OF RECEIVED SIGNALS Russian patent published in 2009 - IPC G01R23/00 

FIELD: physics; radio.

SUBSTANCE: proposed device relates to radio electronics and can be used for determining carrier frequency, type of modulation and keying of signals, received in a given frequency range. The device contains a receiving antenna 1, input circuit 2, search unit 3, high-frequency amplifier 4, heterodyne 5, mixer 6, intermediate frequency amplifier 7, detector 8, video amplifier 9, device for creating frequency sweep 10, cathode ray tube 11, first 12, second 24 and third 46 switches, first 13, second 28, third 29, fourth 31 and fifth 33 amplitude detectors, first 14, second 27 and third 32 high-pass filters, first 15, second 19 and third 26 low-pass filters, first 16 and second 20 squaring devices, first 17 and second 22 voltage dividers, frequency detector 18, first 21, second 50, third 51 and fourth 52 spectrum analysers, first 23, second 30, third 34, fifth 54 and sixth 55 comparator units, phase detector 25, complex spectrum analyser 35, phase spectrum linear component analyser 36, amplitude spectrum symmetry analyser 37, first 38, second 39, third 56, fourth 57 and fifth 58 analogue-to-number converters, first 40, second 42, third 44, fourth 61, fifth 62 and sixth 63 AND matching elements, number-to-voltage converter 45, two-time phase multiplier 47, four-time multiplier 48, and eight-time multiplier 49.

EFFECT: increased functional capabilities of the device through determination of the order of phase keying of the received signal.

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