Exam Questions Papers - Engineering

Q1:

Narrow band FM signal can be represented as

A A cos (2pfct) - βA sin (2pfct) sin (2pfmt)

B A cos (2pfmt) - βA sin (2pfct) sin (2pfmt)

C A cos (2pfct) + βA sin (2pfct) sin (2pfmt)

D A cos (2pfmt) + βA sin (2pfmt) sin (2pfct)

ANS:A - A cos (2pfct) - βA sin (2pfct) sin (2pfmt)

General expression for narrowband FM is A cos (2pfct) - βA sin (2pfct) sin (2pfmt).