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Analog Pulse Modulation – 1 – 1

1. Pulse modulation is used in –

(a) Radio navigation
(b) Automatic landing equipments
(c) Data communications
(d) All of the above

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

2. The signal to quantisation noise ratio in a PCM system depends on –

(a) Sampling rate
(b) Number of quantisation levels
(c) Message signal bandwidth
(d) None of the above

Answer
Answer : (b)

Explanation
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3. All output pulses are at full transmitter power for a strong signal in all of the following except –

(a) PWM
(b) PAM
(c) PFM
(d) PCM

Answer
Answer : (b)

Explanation
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4. Pulse modulation is often used in –

(a) Microwave band
(b) LF band
(c) Telegraphy
(d) Telephony

Answer
Answer : (a)

Explanation
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5. Quantization noise occurs in :

(a) PCM
(b) TDM
(c) FDM
(d) PWD

Answer
Answer : (a)

Explanation
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