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Modulation channel consists of

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Modulation channel consists of

(a) Amplifier

(b) Signal processing units

(c) Amplifier & Signal processing units

(d) None of the mentioned

I got this question during an interview for a job.

My question is based upon Digital Communication System in chapter Signals and Spectra of Digital Communications

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Right option is (c) Amplifier & Signal processing units

The explanation is: When information is transmitted through large distance it must be amplified. Modulation channel consists of an amplifier and other signal processing units.

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