1- Explain the principle of direct method generation of FM signal.2- What is the difference between narrowband FM and wideband FM refer tothe spectral component of the two signals.3- Compare the S/N ratio of:a) AM DSB-LCb) AM SSB-SCc) FM4- Explain the operation of frequency demodulation by using the PLL method.5- Explain what Carson's rule is. 50-K-1cosFM signalkfIntegratorTrigonometricFunctionAcMessage signal100feFigure (2): FM Modulation.butter50+1Continuous-TimeVCOCosMatrix2nMultiplyTrigonometricFuncionMessaze signalIntegratorMatrix MuliplyAnalogFiter DesignCortinuous-TimeVCO100feScope1Figure (3): FM Demodulation. T2T,T,T,-v-v(a) Sound Wave(intelligence signal)(a) Sound Wave(intelligence signal)+VA(b) Frequency Modulation (FM)-VCarrier orrest frequency(d) Amplitude Modulation (AM)+f(c) Frequency Versus Time in FMFigure (1) FM signal vs. AM signal.

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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1- Explain the principle of direct method generation of FM signal.
2- What is the difference between narrowband FM and wideband FM refer to
the spectral component of the two signals.
3- Compare the S/N ratio of:
a) AM DSB-LC
b) AM SSB-SC
c) FM
4- Explain the operation of frequency demodulation by using the PLL method.
5- Explain what Carson's rule is.

50
-K-
1
cos
FM signal
kf
Integrator
Trigonometric
Function
Ac
Message signal
100
fe
Figure (2): FM Modulation.
butter
50
+1
Continuous-Time
VCO
Cos
Matrix
2n
Multiply
Trigonometric
Funcion
Messaze signal
Integrator
Matrix Muliply
Analog
Fiter Design
Cortinuous-Time
VCO
100
fe
Scope1
Figure (3): FM Demodulation.

T2
T,
T,
T,
-v
-v
(a) Sound Wave
(intelligence signal)
(a) Sound Wave
(intelligence signal)
+V
A
(b) Frequency Modulation (FM)
-V
Carrier or
rest frequency
(d) Amplitude Modulation (AM)
+f
(c) Frequency Versus Time in FM
Figure (1) FM signal vs. AM signal.

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