Suppose an engineer increases the number of possible signal levels from two to four. How many more bits can be sent in the same amount of time? Explain.
What will be an ideal response?
The number of levels that can be represented by n bits is given by 2 n . So if number of levels
changes from 2 ? 4, it means number of bits goes from 1 ? 2
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Fill in the blank(s) with the appropriate word(s).
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A. descending B. negative C. ascending D. positive
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