initial commit / add all books

9 files changed, 100 insertions, 0 deletions

diff --git a/1595/CH2/EX2.1/ex2_1.sce b/1595/CH2/EX2.1/ex2_1.sce
new file mode 100755
index 000000000..a00e6b42e
--- /dev/null
+++ b/1595/CH2/EX2.1/ex2_1.sce
@@ -0,0 +1,15 @@
+// Amplitude Modulation-Transmission  : example 2-1 : pg(74 & 75)

+//upper sideband is equal to the sum of carrier and intelligence frequencies

+c=1.4*10^6;

+m1=20;

+m2=10*10^3;

+Ur1=c+m1;

+Ur2=c+m2;

+Lr1=c-m1;

+Lr2=c-m2;

+//range of upper sideband(usb)

+printf("\nupper sideband will include frequencies from  %.f Hz",Ur1 ); 

+printf("\nto \n %.f Hz",Ur2);

+//range of lower sideband (lsb)

+printf("\nlower sideband will include frequencies from  %.f Hz",Lr1);

+printf("\nto \n %.f Hz",Lr2);
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diff --git a/1595/CH2/EX2.2/ex2_2.sce b/1595/CH2/EX2.2/ex2_2.sce
new file mode 100755
index 000000000..3bca7af42
--- /dev/null
+++ b/1595/CH2/EX2.2/ex2_2.sce
@@ -0,0 +1,18 @@
+// Amplitude Modulation-Transmission : example 2-2 : pg(78)

+b=100;

+a=60;

+d=125;

+c=35;

+x=180;

+y=0;

+m1=((b-a)/(b+a))*100;

+m2=((d-c)/(d+c))*100;

+m3=((x-y)/(y+x))*100;

+//part(a)

+printf("\npercent(m) = (B-A/B+A)*100percent = %.f percent",m1);

+//part(b)

+printf("\npercent(m) = (B-A/B+A)*100percent = %.f percent",m2);

+//part(c)

+printf("\npercent(m) = (B-A/B+A)*100percent = %.f percent",m3);

+//part(d) : this is a case of overmodulation

+//part(e) : this is a distorted AM wave as the increase > decrease in carrier's amplitude
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diff --git a/1595/CH2/EX2.3/ex2_3.sce b/1595/CH2/EX2.3/ex2_3.sce
new file mode 100755
index 000000000..68731d7c8
--- /dev/null
+++ b/1595/CH2/EX2.3/ex2_3.sce
@@ -0,0 +1,14 @@
+// Amplitude Modulation-Transmission : example 2-3 : pg(79 & 80)

+// m=1 or 100 percent

+//each side frequency = 1/2 the carrier amplitude

+//power is proportional to (V)^2

+//each side band  power = 1/4 carrier power

+c=1*10^3;

+esb= 1/4*(c);

+tsp=(esb*2);

+tp=(tsp+c);

+printf("\nESF = mEc/2 ");

+printf("\nCarrier power = %.f W",c);

+printf("\n Each side-band power = 1/4 of carrier power = %.f W",esb);

+printf("\nTotal side-band power = %.f W",tsp);

+printf("\nTotal transmitted power = %.f W",tp);

diff --git a/1595/CH2/EX2.4/ex2_4.sce b/1595/CH2/EX2.4/ex2_4.sce
new file mode 100755
index 000000000..1f6504bfa
--- /dev/null
+++ b/1595/CH2/EX2.4/ex2_4.sce
@@ -0,0 +1,7 @@
+// Amplitude Modulation-Transmission : example 2-4 : pg(81)

+m=0.9; //modulation index

+Pc=500; //carrier Power 

+x=(m^2)/2;

+y=(1+x)*Pc;

+printf("\nPt = Pc*(1+(m^2)/2)");

+printf("\nPt = %.1f W",y);//total transmitted powwer

diff --git a/1595/CH2/EX2.5/ex2_5.sce b/1595/CH2/EX2.5/ex2_5.sce
new file mode 100755
index 000000000..ab2851342
--- /dev/null
+++ b/1595/CH2/EX2.5/ex2_5.sce
@@ -0,0 +1,10 @@
+// Amplitude Modulation-Transmission : example 2-5 : pg(81)

+m=0.95;//modulation index

+Pt= 50*10^3;//total transmitted power

+x=(m^2)/2;

+y=1+x;

+z=(Pt/y);

+Pi=Pt-z;

+printf("\nPt = Pc*(1+(m^2)/2)");

+printf("\nPc = %.f W",z);//carrier power

+printf("\nPi = Pt-Pc = %.f W",Pi);//intelligence signal

diff --git a/1595/CH2/EX2.6/ex2_6.sce b/1595/CH2/EX2.6/ex2_6.sce
new file mode 100755
index 000000000..069c21667
--- /dev/null
+++ b/1595/CH2/EX2.6/ex2_6.sce
@@ -0,0 +1,9 @@
+// Amplitude Modulation-Transmission : example 2-6 : pg(81 & 82)

+Ic=12;//antenna current of AM transmitter when unmodulated

+It=13;//current when modulated

+x=2*((13/12)^2-1);

+m=sqrt(x);

+a=m*100;

+printf("\nIt = Ic.sqrt(1+(m^2)/2) \nm^2 = %.2f ",x);

+printf("\nm = %.2f",m);

+printf("\npercent(m) = %.f percent",a);//percentage of modulation

diff --git a/1595/CH2/EX2.7/ex2_7.sce b/1595/CH2/EX2.7/ex2_7.sce
new file mode 100755
index 000000000..62a1e6a1b
--- /dev/null
+++ b/1595/CH2/EX2.7/ex2_7.sce
@@ -0,0 +1,6 @@
+// Amplitude Modulation-Transmission : example 2-7 : pg(82)

+n=0.7;//efficiency

+c=10*10^3;//carrier wave

+Is=0.5*c;//intelligence signal

+p=(Is/n);

+printf("\ndc input power = %.f W",p);//dc input power
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diff --git a/1595/CH2/EX2.8/ex2_8.sce b/1595/CH2/EX2.8/ex2_8.sce
new file mode 100755
index 000000000..30c862bb5
--- /dev/null
+++ b/1595/CH2/EX2.8/ex2_8.sce
@@ -0,0 +1,11 @@
+// Amplitude Modulation-Transmission : example 2-8 : pg(82 & 83)

+Pc=10*10^3;//carrier power

+Pt=11.2*10^3;//transmitted power

+m2=0.5;//modulation index of another sine wave

+x=2*((Pt/Pc)-1);

+m=sqrt(x);

+meff=sqrt((m^2)+(m2^2));

+a=Pc*(1+((meff^2)/2));

+printf("\nPt = Pc.(1+m^2/2) \nm=%.2f",m);

+printf("\nmeff = sqrt(m1^2+m2^2) \nmeff = %.1f",meff);//effective modulation index

+printf("\nPt = Pc.(1+m^2/2) \n Pt = %.f W",a);//total transmitted power
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diff --git a/1595/CH2/EX2.9/ex2_9.sce b/1595/CH2/EX2.9/ex2_9.sce
new file mode 100755
index 000000000..bf1cf630f
--- /dev/null
+++ b/1595/CH2/EX2.9/ex2_9.sce
@@ -0,0 +1,10 @@
+// Amplitude Modulation-Transmission : example 2-9 : pg(100)

+a=1;

+b=0.03;

+c=0.05;

+d=0.02;

+e=0.04;

+x=sqrt((b^2+c^2+d^2+e^2)/a^2);

+y=x*100;

+printf("\nTHD = sqrt((V2^2)+(V3^3)+(V4^2)+(V5^2)/(V1^2)) \nTHD = %.5f",x);

+printf("\nTHD = %.2f percent",y);//total harmonic distortion
\ No newline at end of file