A 145.5MHz carrier is frequency modulated by a 2kHz sinusoidal voltage and the frequency swing is 6kHz. The modulation index is
The answer is :- 2 Modulation index = . Frequency swing of carrier = 6 kHz, so,
frequency deviation of carrier = 3 kHz, i.e. half of swing.
Thus, the modulation index = 1.5, i.e. there is a swing
of 6 kHz, 2000 times per second.
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