SPECTRUM ANALYZER Russian patent published in 1994 - IPC

FIELD: radio measurement technology. SUBSTANCE: spectrum analyzer uses input 1, calibrator 2, time-base generator 3, sweep-frequency generator 4, mixer 5, IF amplifier 6, square-law detectors 7, 17, 25, frequency discriminator 8, differentiating unit 9, rectifiers 10, 20 coincidence units 11, 21, DC amplifiers 12, 27, switches 13, 18, 22, 26, 28, 30, cathode-ray tubes 14, 23, 29, 31, multiplier 15, band-pass filters 16, 24, phase inverter 19. EFFECT: enhanced accuracy. 5 dwg