Analog & Digital Modulation – Exercise – 1

1. Which of the following modulating system is digital ?

(a) PPM
(b) PWM
(c) PCM
(d) PEM

Answer
Answer : (c)
Explanation
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2. In low level modulation system , the amplifiers following the modulated stage should be :

(a) Only class C amplifier
(b) Only harmonic generators
(c) Only linear amplifier
(d) Any of the above

Answer
Answer : (c)
Explanation
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3. In a low level amplitude modulation system, the amplifier following the modulated stage must be :

(a) A class C amplifier
(b) A linear device
(c) A non-linear device
(d) A harmonic device

Answer
Answer : (b)
Explanation
No answer description available for this question. Let us discuss.

4. PPM is :

(a) Digital modulating technique
(b) Analogue modulating technique
(c) Linear modulating technique
(d) Not a modulation technique

Answer
Answer : (b)
Explanation
No answer description available for this question. Let us discuss.
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