Discussion
Which statement about the two angle modulations is false?
Answer: D
The false statement is the first: PM's bandwidth is directly proportional to the message frequency, since its index is what stays constant. The other three are all true and are the properties that make the two schemes one family. This is the same index-versus-bandwidth confusion that recurs throughout the topic, and it is worth testing yourself on the distinction until the two statements cannot be interchanged. Checking the units of each quantity catches a wrong formula before the arithmetic begins.
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