a) An amplitude modulated (AM) signal is made up of a carrier (with constant frequency) in which its amplitude is changed (modulated) with respect to the signal (modulating signal) we wish to transmit (voice, music, data, binary). Figure Q3 (a) shows an AM envelope. Volt St 36Vp 12Vp Figure Q3 (a) i. Determine the amplitude of the carrier ii. Determine the amplitude of the information signal iii. Calculate the modulate coefficient and percentage modulation 1

a) An amplitude modulated (AM) signal is made up of a carrier (with constant frequency) in which its amplitude is changed (modulated) with respect to the signal (modulating signal) we wish to transmit (voice, music, data, binary). Figure Q3 (a) shows an AM envelope. Volt St 36Vp 12Vp Figure Q3 (a) i. Determine the amplitude of the carrier ii. Determine the amplitude of the information signal iii. Calculate the modulate coefficient and percentage modulation 1

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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a) For amplitude modulation (AM)i) Write the time domain equation for AM signal XAM(t).ii) Write the frequency domain equation for AM signal XAM(ω).iii) Draw the circuit diagram for the envelop detector.iv) Define the modulation index and its maximum value. b) An audio signal 3sin 2π(4000t) amplitude modulates a carrier 5sin 2π(500000t).i) Sketch the amplitude modulated wave.ii) Determine the modulation index ?iii) What is the frequency content of the modulated wave? c) An audio signal 10sin 2π(2000t) amplitude modulates a carrier 20sin 2π(200000t).i) Sketch the amplitude modulated wave.ii) Determine the modulation index?iii) What is the frequency content of the modulated wave? d) How many AM broadcast stations can be accommodated in a 100 KHz bandwidth if the highest frequency modulating a carrier fmax is 5 KHz? e) The total power content of an AM signal is 1000 W. Determine the carrier power PC and the sideband power Ps and power efficiency when the modulation index is 0.5? f) An…
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