Question

What is the role of channel in communication system?

(a) acts as a medium to send message signals from transmitter to receiver

(b) converts one form of signal to other

(c) allows mixing of signals

(d) helps to extract original signal from incoming signal

The question was posed to me in my homework.

This intriguing question comes from Channel topic in chapter Elements of Communication System of Analog Communications

Answer 1

Right choice is (a) acts as a medium to send message signals from transmitter to receiver

The explanation is: Channel acts as a medium to transmit message signal from source transmitter to the destination receiver. Transducer converts a signal from one form of energy to other. Mixer allows mixing of signals while Demodulator helps to extract original message signal from incoming signal.