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We currently have a perfect channel which accepts frequencies between 200 KHz and 700 KHz and transmits a signal with 8 signal levels. We need

We currently have a perfect channel which accepts frequencies between 200 KHz and 700 KHz and transmits a signal with 8 signal levels. We need to upgrade the channel to a higher channel capacity. Answer the following questions.

a. What is the current capacity?

b. What do we have to change the bandwidth to in order to double the channel capacity?

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