In the process of space communication,the use | vedclass

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(A) modem stands for Modulator-Demodulator. In the process of space communication,at the transmitting end,the modem acts as a modulator to convert dig

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Transmitting and receiving.

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(A) modem stands for Modulator-Demodulator. In the process of space communication,at the transmitting end,the modem acts as a modulator to convert digital signals into analog signals for transmission. At the receiving end,the modem acts as a demodulator to convert the received analog signals back into digital signals. Therefore,the modem acts as a modulator during transmission and as a demodulator during reception.

In the process of space communication,the use of a modem is necessary. In which one of the following modes does a modem act as a modulator and a demodulator respectively?

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