PURPOSE: To enable simple type of independent synchronizing transmission, by taking the bipolar signal from the transmission side as the basic signal of timing at the reception side.
CONSTITUTION: The transmission controller 11 receiving the transmission data TxC from the serial parallel modulator feeds the waveforms a, b to the drivers 13a, 13b via the AND gates 12a, 12b by the carrier control CRR. The bipolar signal is outputted to the transmission line 15 with this signal. When the signal C' is received at the demodulation system, the signals (a'), (b') are outputted from the differential amplifier 17, this is fed to the reception controller 18 to deliver the reception data RxD, reception clock RxC and carrier detection DCD signal.
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