INDICATION DEVICE Russian patent published in 1994 - IPC

FIELD: radio measurement technology. SUBSTANCE: indication device has reception aerial 1, wide-band amplifier 2, mixers 3, 4, search unit 5, heterodyne 6, phase inverters 7, 10, 54 of + 90 deg, amplifiers 8, 9 of intermediate frequency, adders 11, 18, multipliers 12, 19, 42, band-pass filters 13, 20, 24, 28, 38, 40, 43, 45, 47, amplitude detectors 14, 21, 25, 29, keys 15, 22, 26, 30, 36, 51, units 16, 23, 27, 31, phase inverter 17 of - 90 deg, OR gate 32, detector 33, delay elements 34, 41, CRTs 35, 55, 60, scale-of-eight multipliers 37, 33, scale-of-eight dividers 39, 46, phase discriminator 48, low-pass filter 49, former 50 of controlling signal, reference voltage generator 52, frequency discriminators 53, 56, differentiation circuits 57, 58, sweep generator 59. EFFECT: expanded range of frequency search for complex signals with combined linear frequency modulation and phase-shift keying without widening of range of frequency re-tuning of heterodyne. 7 dwg