FIELD: signals modulation technologies.
SUBSTANCE: device has first phase detector, second phase detector and shifter, and additionally has supporting signal generator, first and second ADC, first, second, third and fourth memory registers, step synchronization assembly, calculating means and graphical indicator.
EFFECT: use of device and specific operation algorithm allows to recognize following types of manipulation: phase modulation, phase modulation with shift, amplitude-phase modulation, quadrature amplitude modulation.
6 dwg
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