INDICATION DEVICE Russian patent published in 1994 - IPC

FIELD: indication and registration instruments. SUBSTANCE: indication device has sweep generator 1, cathode-ray tubes 2, 33, 34, aerials 3, 42, wide-band amplifiers 4, 43, frequency discriminators 5, 30, differentiation circuits 6, 7, mixers 8, 44, intermediate frequency amplifiers 9, 45, keys 10, 27, scale-of-eight amplifiers 11, 17, 38, band-pass filters 12, 14, 16, 18, 20, scale-of-eight dividers 13, 19, multipliers 15, 48, 49, phase discriminator 21, low-pass filters 22, 50, 51, former 23 of controlling signal, element 24 of controlled delay, detector 25, delay element 26, search unit 28, heterodyne 29, phase inverters 31, 46, 47 of 90 deg, reference voltage generator 32, information input 35, reset input 36, meters 37, 39 of width of spectrum, comparator 40, threshold unit 41, squarers 52, 53, adder 54, unit 55 of extraction of square root, single-polarity valve 56, meter 57 of time intervals and register 58. EFFECT: expanded functional capabilities by accurate and single-sign direction finding of source of emission of complex signals with combined linear frequency modulation and multiple phase-shift keying. 2 cl, 7 dwg