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Exam Questions Papers - Engineering

Q1:

A certain 8 bit uniform quantization PCM system can accommodate a signal ranging from - 1 V to + V. The rms value of the signal is V . The signal to quantization noise ratio is:

A 30 dB

B 46.91 dB

C 40 dB

D 49.92 dB

ANS:D - 49.92 dB

(SNR)dB = 1.76 + 6.02n n = 8 Thus (SNR)dB = 1.76 + 6.02 x 8 = 49.92 dB.