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electronics and communication engineering communication systems
1. 24 telephone channels, each band limited to 3.4 kHz are to be time division multiplexed using PCM. If sampling frequency is 10 kHz and number of quantization levels is 128, the required bandwidth of PCM is
(A): 1.68 MHz
(B): 240 kHz
(C): 3.072 MHz
(D): 81.6 kHz
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By: guest on 01 Jun 2017 11.48 pm
Bandwidth ≈ 24 (ln2 128) 10 kHz = 1.68 MHz.
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