Question

A message signal of frequency 20 khz and peak voltage of 20 volts is used to modulate a carrier signal of frequency 2 mhz and peak voltage of 40 volts determine 1. Modulation index 2. The side bands produced draw the corresponding frequency spectrum of amplitude modulated signal

Answer 1

Hey dear,

● Answer-
Modulation index = 0.5
Side bands = 2020 kHz and 1980 kHz.

● Explanation-
# Given-
Em = 20 V
fm = 20 kHz
Ec = 40 V
fc = 2 mHz = 2000 kHz

# Solution-
Modulation index is given by -
Modulation index = Em / Ec
Modulation index = 20 / 40
Modulation index = 0.5

Side bands produced are
fc+fm and fc-fm -
fc + fm = 2000 + 20 = 2020 Hz
fc - fm = 2000 - 20 = 1980 Hz

Hope this is useful...

Answer 2

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