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Diffstat (limited to 'Modern_Electronics_Communication/Chapter2.ipynb')
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diff --git a/Modern_Electronics_Communication/Chapter2.ipynb b/Modern_Electronics_Communication/Chapter2.ipynb new file mode 100755 index 00000000..1e4a523b --- /dev/null +++ b/Modern_Electronics_Communication/Chapter2.ipynb @@ -0,0 +1,384 @@ +{
+ "metadata": {
+ "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "chapter 2 Amplitude Modulation-Transmission"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.1 Page no 74"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "c=1.4*10**6 #frequency of carrier wave,Hz\n",
+ "m1=20 #frequency component,Hz\n",
+ "m2=10*10**3 #KHz\n",
+ "\n",
+ "#calculation \n",
+ "Ur1=c+m1\n",
+ "Ur2=c+m2\n",
+ "Lr1=c-m1\n",
+ "Lr2=c-m2\n",
+ "\n",
+ "#result\n",
+ "#range of upper sideband(usb)\n",
+ "print\"upper sideband will include frequencies from \",Ur1,\"Hz\"\n",
+ "print\"to \",Ur2,\"Hz\"\n",
+ "#range of lower sideband (lsb)\n",
+ "print\"lower sideband will include frequencies from \",Lr2,\"Hz\"\n",
+ "print\"to \",Lr1,\"Hz\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "upper sideband will include frequencies from 1400020.0 Hz\n",
+ "to 1410000.0 Hz\n",
+ "lower sideband will include frequencies from 1390000.0 Hz\n",
+ "to 1399980.0 Hz\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.2 Page no 78"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "b=100.0 #maximum p-p carrier (V)\n",
+ "a=60.0\n",
+ "d=125.0\n",
+ "c=35.0\n",
+ "x=180\n",
+ "y=0\n",
+ "\n",
+ "#Calculation\n",
+ "m1=((b-a)/(b+a))*100\n",
+ "m2=((d-c)/(d+c))*100\n",
+ "m3=((x-y)/(y+x))*100\n",
+ "\n",
+ "#result\n",
+ "print\"(a) percent(m) = \",m1,\"percent\"\n",
+ "print\"(b) percent(m) = \",m2,\"percent\"\n",
+ "print\"(c) percent(m) = \",m3,\"percent\"\n",
+ "print\"(d) this is a case of overmodulation\"\n",
+ "print\"(e) this is a distorted AM wave as the increase > decrease in carrier's amplitude\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) percent(m) = 25.0 percent\n",
+ "(b) percent(m) = 56.25 percent\n",
+ "(c) percent(m) = 100 percent\n",
+ "(d) this is a case of overmodulation\n",
+ "(e) this is a distorted AM wave as the increase > decrease in carrier's amplitude\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.3 Page no 79"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "c=1*10**3 #carrier output\n",
+ "\n",
+ "#calculation\n",
+ "esb= 1/4.0*(c)\n",
+ "tsp=(esb*2)\n",
+ "tp=(tsp+c)\n",
+ "\n",
+ "#result\n",
+ "print\"Total transmitted power =\",tp,\"W\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Total transmitted power = 1500.0 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.4 Page no 81"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "m=0.9 #modulation index\n",
+ "Pc=500 #carrier Power \n",
+ "\n",
+ "#calculation\n",
+ "x=(m**2)/2.0\n",
+ "y=(1+x)*Pc\n",
+ "\n",
+ "#result\n",
+ "print\"total transmitted power= \",y,\"W\" #total transmitted powwer\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "total transmitted power= 702.5 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.5 Page no 81"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "m=0.95 #modulation index\n",
+ "Pt= 50*10**3 #total transmitted power\n",
+ "\n",
+ "#calculation\n",
+ "x=(m**2)/2.0\n",
+ "y=1+x\n",
+ "z=(Pt/y)\n",
+ "Pi=Pt-z\n",
+ "\n",
+ "#result\n",
+ "print\"Pc = \",round(z,2),\"W\" #carrier power\n",
+ "print\"total intelligence power = \",round(Pi,2),\"W\" #intelligence signal\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Pc = 34453.06 W\n",
+ "total intelligence power = 15546.94 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.6 Page no 81"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "Ic=12 #antenna current of AM transmitter when unmodulated\n",
+ "It=13 #current when modulated\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "x=2*((13/12.0)**2-1)\n",
+ "m=math.sqrt(x)\n",
+ "a=m*100\n",
+ "\n",
+ "#result\n",
+ "print\"percent(m) = \",round(a,0),\"percent\" \n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "percent(m) = 59.0 percent\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.7 Page no 82"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "n=0.7 #efficiency\n",
+ "c=10*10**3 #carrier wave\n",
+ "\n",
+ "#calculation\n",
+ "Is=0.5*c #intelligence signal\n",
+ "p=(Is/n)\n",
+ "\n",
+ "#result\n",
+ "print\"dc input power = \",round(p,2),\"W\" #dc input power"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "dc input power = 7142.86 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 14
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.8 Page no 82"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "Pc=10.0*10**3 #carrier power\n",
+ "Pt=11.2*10**3 #transmitted power\n",
+ "m2=0.5 #modulation index of another sine wave\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "x=2*((Pt/Pc)-1)\n",
+ "m=math.sqrt(x)\n",
+ "meff=math.sqrt((m**2)+(m2**2))\n",
+ "a=Pc*(1+((meff**2)/2.0))\n",
+ "\n",
+ "#result\n",
+ "print\"Pt = \",a,\"W\" #total transmitted power"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Pt = 12450.0 W\n"
+ ]
+ }
+ ],
+ "prompt_number": 15
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 2.9 Page no 100"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# given\n",
+ "v1=1.0\n",
+ "v2=0.03\n",
+ "v3=0.05\n",
+ "v4=0.02\n",
+ "v5=0.04\n",
+ "\n",
+ "#calculation\n",
+ "import math\n",
+ "x=math.sqrt((v2**2+v3**2+v4**2+v5**2)/v1**2)\n",
+ "y=x*100\n",
+ "\n",
+ "#result\n",
+ "print\"THD = \",round(y,2),\"percent\" #Total harmonic distortion "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "THD = 7.35 percent\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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