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    PCM and PAM

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    A. What do the letters PCM and PAM stand for? Why is PCM transmission preferred over PAM transmission? Give at least two reasons in your answer.

    b. A four wire analog transmission circuit requires amplifiers at specific intervals if the distance between terminals exceeds 10 miles. A PCM transmission system also requires a four wire circuit and amplifiers. Why is a four wire circuit required?

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    a. PCM stands for Pulse Code Modulation, while PAM stands for Pulse Amplitude Modulation. PCM is much preferred over ...

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