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Figure shows the block diagram of a wideband frequency modulator using the indirect method. This modulator is used to transmit audio signals containing frequencies in the range of 100 Hz to 15 kHz. The narrowband phase modulator is supplied with a carrier of frequency f1 = 0.1 MHz by a crystal-controlled oscillator. A second crystal. controlled oscillator student submitted image, transcription available below a question and you will be sure to find an answer!
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