The electromagnetic wave radiated from an antenna of resistance 77 ohms is denoted by the expression S Vc(1+Vm sin2n fmt) sin2Tt fct; where Vm = 7.5 V, Vc = 16.5 V, fm= 44KHZ and fc = 78MHZ. Find %3D (1) the expression for the message signal (ii) the expression for the carrier (iii) Draw its spectrum and find the sidebands ( (iv) Find the bandwidth ( (v) Find the total transmitted power

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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The electromagnetic wave radiated from an antenna of resistance 77 ohms is denoted by the expression S(t)
Vc(1+Vm sin2T fmt) sin2Tt fct; where Vm = 7.5 V, Vc = 16.5 V, fm= 44KHZ and fc = 78MHZ. Find
%3D
(1) the expression for the message signal
(ii) the expression for the carrier
(iii) Draw its spectrum and find the sidebands (
(iv) Find the bandwidth (
(v) Find the total transmitted power
(vi) Find the power needed for transmission if there is no message
Transcribed Image Text:The electromagnetic wave radiated from an antenna of resistance 77 ohms is denoted by the expression S(t) Vc(1+Vm sin2T fmt) sin2Tt fct; where Vm = 7.5 V, Vc = 16.5 V, fm= 44KHZ and fc = 78MHZ. Find %3D (1) the expression for the message signal (ii) the expression for the carrier (iii) Draw its spectrum and find the sidebands ( (iv) Find the bandwidth ( (v) Find the total transmitted power (vi) Find the power needed for transmission if there is no message
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