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H.W: Repeat the previous example assuming that the modulating signal is given by: f(t) = {" St – 1, 0, 0

H.W: Repeat the previous example assuming that the modulating signal is given by: f(t) = {" St – 1, 0, 0

Introductory Circuit Analysis (13th Edition)
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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Ex 4-3: A transmitter transmits an AM/DSB single tone-modulating signal given by 3 cos(2n10 t)volt with a carrier signal given by 10 cos(2n106t)volt ,Find: 1- Modulation depth. 2- USB & LSB frequencies. 3- Amplitude of sideband frequencies. 4- Efficiency of Transmission. Solution: Am-3 v, Ac=10 v fm=103 Hz, f=106 Hz Am x 100% = × 100% = 30% Ac 1- D = 10 2- USB frequency is fc + fm 106 + 103 = 1.001 MHz LSB frequency is fc - fm = 106 – 103 0.999 MHz mAc 0.3x10 3- Amp. of USB & LSB is 4 0.75 volt 4 m2 0.32 Ps 4- η= Pt = 4.3 % m2+2 0.32+2
Transcribed Image Text:Ex 4-3: A transmitter transmits an AM/DSB single tone-modulating signal given by 3 cos(2n10 t)volt with a carrier signal given by 10 cos(2n106t)volt ,Find: 1- Modulation depth. 2- USB & LSB frequencies. 3- Amplitude of sideband frequencies. 4- Efficiency of Transmission. Solution: Am-3 v, Ac=10 v fm=103 Hz, f=106 Hz Am x 100% = × 100% = 30% Ac 1- D = 10 2- USB frequency is fc + fm 106 + 103 = 1.001 MHz LSB frequency is fc - fm = 106 – 103 0.999 MHz mAc 0.3x10 3- Amp. of USB & LSB is 4 0.75 volt 4 m2 0.32 Ps 4- η= Pt = 4.3 % m2+2 0.32+2
H.W: Repeat the previous example assuming that the modulating signal is given by: S(C) = {": 0 <t < 2 * 10-3 2 * 10-3 <t < 4 * 10-3 – 1, t - 0, Assume that the signal is band-limited to 1 kHz.
Transcribed Image Text:H.W: Repeat the previous example assuming that the modulating signal is given by: S(C) = {": 0 <t < 2 * 10-3 2 * 10-3 <t < 4 * 10-3 – 1, t - 0, Assume that the signal is band-limited to 1 kHz.
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