0 votes
in Communication Systems by (27.4k points)
closed by

The given figure shows the frequency spectrum of an amplitude modulated wave.

1. What are the names of (ωc – ωm) and (ωc + ωm).

2. What is the value of amplitude of (ωc – ωm) if modulation is µ?

3. What is the modulation index of AM, if the voltage amplitude of the carrier wave is 2kV and side band voltage amplitude is 200V.

1 Answer

+1 vote
by (27.0k points)
selected by
Best answer

1. Lower side band frequency and upper side band frequency.

2. Value of the amplitude of the side band frequency is As = \(\frac{\mu A_c}{2}\) where Ac is amplitude of carrier.

3.  As = \(\frac{\mu A_c}{2},\mu=\frac{2A_s}{A_c}\) = \(\frac{2\times200}{2000}\) = 0.2

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.