Design an Armstrong indirect FM modulator to generate an FM signal with a carrier frequency of 96.3 MHz and frequency deviation delta f = 20 kHz. The message signal has a bandwidth of 15 kHz. You have at your disposal a narrowband FM generator with a fixed center frequency fc = 150 kHz and an adjustable delta f from 5 to 15 Hz. You also have frequency doublers, mixers and an oscillator with an adjustable frequency from 13 to 14 MHz. There are also bandpass filters of any specification.
A. Draw the block diagram of the system. Specify the settings on each adjustable device. Specify the center frequency and bandwidth of each bandpass filter.
B. Draw the block diagram of a de-modulator for the FM signal.