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1. A scheme shown below is to generate a wide band FM modulate signal. Narrow band FM has carrier frequency = 400 KHz Deviation ratio = 0.2 Wide band FM has carrier frequency = 100 MHz Deviation ratio = 6 Local oscillator frequencies can be
(A): 88 MHz, 112 MHz
(B): 90 MHz, 110 MHz
(C): 92 MHz, 108 MHz
(D): 96 MHz, 104 MHz
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