Question

For which of the modulated system, the linear amplified modulated stage is used?

(a) low level amplitude modulated system

(b) high level amplitude modulated system

(c) high level frequency modulated system

(d) low level frequency modulated system

This question was posed to me in an interview.

My doubt stems from Generation of DSBSC Waves in portion Double Sideband Suppressed Carrier Modulation of Analog Communications

Answer 1

The correct answer is (a) low level amplitude modulated system

Easiest explanation: In low-level modulation, the generation of amplitude modulated signal takes place at low power levels. The generated AM signal is then amplified using a chain of linear amplifiers, which are required to avoid waveform distortion. Thus, linear amplified modulated stage is used in low level amplitude modulated system.