FIELD: electric communications. SUBSTANCE: transmitting part of device has pilot signal generator 5, adder 3, communication line matching element 6, first and second switching modulators 1 and 2. Receiving part of device has first and second frequency converters 4 and 17, selective pilot signal amplifier 16, input matching element 19, first and second integrators 12 and 13, controlled pulse generator 18, first and second switching demodulators 10 and 11. EFFECT: simplified design, decreased distortions of transmitted signal. 1 dwg
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