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Waveform Coding Techniques – 1 – 1

1. While demodulating PCM, its is first converted into –

(a) PAM
(b) PPM
(c) PWM
(d) None of the above

ANSWER

EXPLANATION

2. The modulation system inherently most noise resistant is :

(a) FM
(b) PM
(c) PWM
(d) PCM

ANSWER

EXPLANATION

3. While demodulating PCM, its is first converted into –

(a) PAM
(b) PPM
(c) PWM
(d) None of the above

ANSWER

EXPLANATION

4. For transmission of normal speech signal, the PCM channel needs a bandwidth :

(a) 2 kHz
(b) 4 kHz
(c) 8 kHz
(d) 64 kHz

ANSWER

EXPLANATION

5. The biggest disadvantage of PCM is :

(a) its inability to handle analog signals
(b) the high error rate which its quantizing noise introduces
(c) its incompatibility with TDM
(d) the large bandwidths that are required for it

ANSWER

EXPLANATION

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