50. The use of non-uniform quantization leads to
A. reduction in transmission bandwidth
B. increase in maximum SNR
C. increase in SNR for signal levels
D. simplification of quantization process.

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51. In pulse modulation, the number of samples required to ensure no loss of information is given by
A. Nyquist theorem
B. Parsevals theorem
C. Fourier transform
D. None of the above

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52. Pulse amplitude modulation is a process whereby
A. the position ofthe pulse is changed as a function of the sampled value
B. the width of the pulse is varied as a function of time
C. the height of a pulse is made proportional to the sampled value
D. None of the above

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53. Which of the following is restriction imposed on the reconstruction of a sampled signal?
A. Impulses must be passed through a high pass filter
B. Impulses must be passed through a band pass filter
C. The sampling rate must be in the form of impulses
D. None of the above

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54. Pulse width of modulation is a process whereby
A. the position of a pulse is changed as a function of the sampled value
B. the sampled value is first coded and then transmitted
C. the width of a pulse is varicd as a function of the sampled value
D. None of the above

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55. The signal-to-noise (S/N) ratio appearing at the output of each channel in PAM is
A. three times the input S/N
B. one-and-half times the input S/N
C. twice the input S/N
D. None of the above

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56. A PWM signal can be generated by
A. a monostable multi-vibrator
B. a astable multi-vibrator
C. integrating the PPM signal
D. differentiating the PPM signal

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