Question:medium

Assertion (A): 8-bit PCM system performs better than 4-bit PCM system. Reason (R): 8-bit system produces smaller quantization noise than 4-bit system.

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More bits → less quantization noise → better PCM.

Updated On: May 20, 2026

Both (A) and (R) are correct and (R) is correct explanation
Both (A) and (R) are correct but (R) is not explanation
(A) is correct but (R) is incorrect
(A) is incorrect but (R) is correct

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The Correct Option is A

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Top Questions on communication systems

The percentage of the total power carried by the sidebands of the AM wave for tone modulation when the modulation index is 0.3 is:
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Match List-I with List-II:

List-I (Modulation Schemes)	List-II (Wave Expressions)
(A) Amplitude Modulation	(I) \( x(t) = A\cos(\omega_c t + k m(t)) \)
(B) Phase Modulation	(II) \( x(t) = A\cos(\omega_c t + k \int m(t)dt) \)
(C) Frequency Modulation	(III) \( x(t) = A + m(t)\cos(\omega_c t) \)
(D) DSB-SC Modulation	(IV) \( x(t) = m(t)\cos(\omega_c t) \)

Choose the correct answer:

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