None 2.37 Figure P2.37 shows the block diagram of a wideband frequency modulator using theindirect method. This modulator is used to transmit audio signals containing frequencisin the range of 100 Hz to 15 kHz. The narrowband phase modulator is supplied with acarrier of frequency fa 0.1 MHz by a crystal-controlled oscillator. A second crystal-controlled oscillator supplies a sinusoidal wave of frequency 9.5 MHz to the mixer. Thesystem specifications are as follows:Carrier frequency at the transmitter output, f. - 100 MHzMinimum frequency deviation, Af = 75 kHz nyMaximum modulation index in the phase modulator =(a) Calculate the frequency multiplication ratios nh and nz (preceding and following themixer), which will satisfy these specifications.(b) Specify the values of the carrier frequency and frequency deviation at the variouspoints in the modulator of Figure P2.37.0.3 radiansNarrowbandphase-modulatorFrequencymultiplierFrequencymultiplierFMBasebandIntegratorMixersignalsignalA-0.1 MHz= 9.5 MHzCrystal-controlledoscillatorCrystal-controlledoscillatorFIGURE P2.37

Answered: Image /qna-images/answer/1cb2904a-4988-4eaa-a89b-ad08bc01a35a.jpg

2.37 Figure P2.37 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 fi 0.1 MHz by a crystal-controlled oscillator. A second crystal- controlled oscillator supplies a sinusoidal wave of frequency 9.5 MHz to the mixer. The system specifications are as follows: Carrier frequency at the transmitter output, f. 100 MHz Minimum frequency deviation, Af = 75 kHz y Maximum modulation index in the phase modulator = 0.3 radians (a) Calculate the frequency multiplication ratios n, and nz (preceding and following the mixer), which will satisfy these specifications. (b) Specify the values of the carrier frequency and frequency deviation at the various points in the modulator of Figure P2.37. %3D Baseband signal Narrowband phase- modulator Frequency multiplier Frequency multiplier FM signal Mixer Integrator A - 0.1 MHz f=9.5 MHz Crystal- controlled oscillator Crystal- controlled oscillator

2.37 Figure P2.37 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 fi 0.1 MHz by a crystal-controlled oscillator. A second crystal- controlled oscillator supplies a sinusoidal wave of frequency 9.5 MHz to the mixer. The system specifications are as follows: Carrier frequency at the transmitter output, f. 100 MHz Minimum frequency deviation, Af = 75 kHz y Maximum modulation index in the phase modulator = 0.3 radians (a) Calculate the frequency multiplication ratios n, and nz (preceding and following the mixer), which will satisfy these specifications. (b) Specify the values of the carrier frequency and frequency deviation at the various points in the modulator of Figure P2.37. %3D Baseband signal Narrowband phase- modulator Frequency multiplier Frequency multiplier FM signal Mixer Integrator A - 0.1 MHz f=9.5 MHz Crystal- controlled oscillator Crystal- controlled oscillator

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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