DEVICE FOR MEASURING FREQUENCY DEVIATION Russian patent published in 1999 - IPC

FIELD: measuring technology. SUBSTANCE: device includes input signal source 1, generator under test 5 and reference generator 3, phase detectors 7, 12, automatic frequency control unit 11, flip-flops 14, 15, pulse shapers 6, 4, pulse crystal oscillator 8, frequency synthesizer 9, frequency divider 10, pulse counter 13, univibrator 18, reversible counter 17, memory register 19 and digital indicator 20. EFFECT: enhanced accuracy due to automatic control of duration of measurement cycle inversely proportional to frequency deviation and avoidance of instability of carrier frequency at two-stroke conversion. 2 dwg