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If the levels in PCM are transmitted in 10 unit code having sampling frequency equals to 20KHz. What is its bandwidth?

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If the levels in PCM are transmitted in 10 unit code having sampling frequency equals to 20KHz. What is its bandwidth?

(a) 150KHz

(b) 125KHz

(c) 100KHz

(d) 110KHz

This question was posed to me in final exam.

My doubt is from Average Power For Sinusoidal AM topic in section Amplitude Modulation of Analog Communications

1 Answer

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Best answer
Right answer is (c) 100KHz

To explain I would say: PCM bandwidth is half of Bit rate.

   Bit Rate = 10 X 20 = 200

   Bandwidth = 200/2 = 100 KHz.

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