An FM modulator has f c = 2000 Hz and f d = 20 Hz/V. The modulator
Question:
An FM modulator has fc = 2000 Hz and fd = 20 Hz/V. The modulator has input m(t) = 5 cos[2π(10)t].
(a) What is the modulation index?
(b) Sketch, approximately to scale, the magnitude spectrum of the modulator output. Show all frequencies of interest.
(c) Is this narrow band FM? Why?
(d) If the same m(t) is used for a phase modulator, what must kP be to yield the index given in (a)?
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a The peak deviation is 205 100 and f m 10 Thus the modulation index is 10010 10 b The magnitude ...View the full answer
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Related Book For 
Principles of Communications Systems, Modulation and Noise
ISBN: 978-8126556793
7th edition
Authors: Rodger E. Ziemer, William H. Tranter
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