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Which is the greatest disadvantage of Pulse Code Modulation?(a) highly prone to noise(b) cannot travel long distances(c) its inability to handle analog signals(d) large bandwidth is required for itThis question was posed to me in class test.Enquiry is from Modulation of VSB Modulated Wave in section VSB Modulation of Analog Communications

Answer»

Right answer is (d) large bandwidth is required for it

The explanation is: PULSE code MODULATION (PCM) is a digital form of communication. For demodulation of PCM, it is necessary to convert it into PAM. Quantization noise occurs in PCM only. Its greatest DISADVANTAGE is its requirement for large bandwidth.



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