Question

Process of recovering information signal from received carrier is known as ________

(a) Sensitivity

(b) Selectivity

(c) Demodulation

(d) Fidelity

This question was addressed to me in an internship interview.

Enquiry is from Receiver in division Elements of Communication System of Analog Communications

Answer 1

Right answer is (c) Demodulation

To explain I would say: Demodulation means extracting information or message signal from the transmitted modulated wave, while minimum magnitude of input signal required to produced a specified output is known as Sensitivity. The ability of receiver to select wanted signal from various incoming signals is called Selectivity. Fidelity means reproducing all modulating frequencies equally, without any distortion.