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A 108 MHz carrier is frequency modulated by a 10 kHz sine wave with a frequency deviation of 50 kHz. Determine the modulation index, the highest and lowest instantaneous frequencies of the FM wave.
Modulation index for FM,
m∫=∆∫∫m=5010=5
The highest instantaneous frequency, ∫max=∫c+∆∫=108+0.1=108.1 MHz Ans
The lowest instantaneous frequency, ∫min=∫c-∆∫=108-01=107.9 MHz Ans
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