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

EXPLANATION

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

EXPLANATION

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

EXPLANATION

4. Pulse modulation is often used in –

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

ANSWER

EXPLANATION

5. Quantization noise occurs in :

(a) PCM
(b) TDM
(c) FDM
(d) PWD

ANSWER

EXPLANATION

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