When sending four bits at a time using frequency modulation, the number of different frequency levels that would be needed would be _______.
A)24
B)16
C)2
D)8
E)4

Question

Quizplus · Accepted Answer

With four bits, we have a total of 2^4=16 possible combinations. We need a unique frequency level for each combination, so the number of different frequency levels needed is 16. Therefore, the best choice is B, which gives us 16 different frequency levels.

When Sending Four Bits at a Time Using Frequency Modulation