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In a four channel system, all four signals transmitted contain information.

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In a four channel system, all four signals transmitted contain information.

(a) True

(b) False

The question was asked by my school teacher while I was bunking the class.

My question is from Time Division Multiplexing topic in division Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics

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The correct option is (b) False

To explain I would say: After clock pulses of the proper frequency have been obtained, it is necessary to synchronize the multiplexed channels. This is usually done with a special synchronizing (sync) pulse applied to one of the input channels at the transmitter. In the four-channel system discussed previously, only three actual signals are transmitted. The fourth channel is used to transmit a special pulse whose characteristics are unique in some way so that it can be easily recognized.

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