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diff --git a/1574/CH3/EX3.11/M_Ex_3_11.sce b/1574/CH3/EX3.11/M_Ex_3_11.sce
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+clf();
+clc
+//Chapter3: Modulation
+//Example3.11, page no 144
+//Given
+deff("[y]=f(x)","y=Ec*(1+ma*(sin(wm*x)))*sin(wc*x)")
+Ec=10,ma=0.5,wm=10000*%pi,wc=2*%pi*1e7
+x=[0:0.01:20]*%pi/10;
+subplot(2,1,1)
+fplot2d(x,f)
+xlabel("t", "fontsize", 3);
+ylabel("Modulated Wave", "fontsize", 3, "color", "red");
+Fc=wc/(2*%pi)
+Fm=wm/(2*%pi)
+Fusb=(wm+wc)/(2*%pi)
+Flsb=(wm-wc)/(2*%pi)
+mprintf('USB freq=%d k5Hz\nUSB amplitude=%f V\nLSB freq=%d kHz\nLSB amplitude=%f V\nCarrier amplitude=%d V',Fusb*1e-3,2.5,Flsb*-1e-3,2.5,10)
+F=[0,2.5,10,2.5,0]
+T=[-2,-1,0,1,2]
+subplot(2,1,2)
+plot2d3(T,F,5)
+xlabel("Freq", "fontsize", 3);
+ylabel("Amplitude", "fontsize", 3, "color", "blue");
+xlabel("fc-fm                              fc                                fc+fm", "fontsize", 2);
diff --git a/1574/CH3/EX3.11/Result_Figure_3_Ex3_11.jpg b/1574/CH3/EX3.11/Result_Figure_3_Ex3_11.jpg
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+++ b/1574/CH3/EX3.11/Result_Figure_3_Ex3_11.jpg
diff --git a/1574/CH3/EX3.11/Result_of_Chapter_3_Ex3_11.JPG b/1574/CH3/EX3.11/Result_of_Chapter_3_Ex3_11.JPG
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index 000000000..723cc9fc5
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+++ b/1574/CH3/EX3.11/Result_of_Chapter_3_Ex3_11.JPG