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+{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:8e1b5c14d4876dc6b60f9f51fe0f04e94941e7f01c84340bf3441e1daf170b7a"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 3 Amplitude modulation fundamentals"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.1 page no 99"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "Vmax = 5.9\n",
+ "Vmin = 1.2\n",
+ "\n",
+ "#Calculation\n",
+ "m = (Vmax-Vmin)/(Vmax+Vmin)\n",
+ "Vc = (Vmax+Vmin)/2.0\n",
+ "Vm = (Vmax-Vmin)/2.0\n",
+ "m = Vm/Vc\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) The modulation index is \",round(m,2)\n",
+ "print\"Vc= \",Vc,\"Vm= \",Vm,\"(for 2 volt/div on verticle scale)\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The modulation index is 0.66\n",
+ "Vc= 3.55 Vm= 2.35 (for 2 volt/div on verticle scale)\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.2 page no 102"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "frq =980*10**3\n",
+ "frq_range = 5*10**3\n",
+ "\n",
+ "#Calculation\n",
+ "fusb = frq+frq_range\n",
+ "flsb = frq-frq_range\n",
+ "bw=fusb-flsb\n",
+ "\n",
+ "#Result\n",
+ "print\"The upper sideband is at \",fusb/10**3,\"Khz\"\n",
+ "print\"Lower sideband is at \",flsb/10**3,\"Khz\"\n",
+ "print\"the babdwidth is \",bw/10**3,\"KHz\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The upper sideband is at 985 Khz\n",
+ "Lower sideband is at 975 Khz\n",
+ "the babdwidth is 10 KHz\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.3 page no 106"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "Pc = 30\n",
+ "m=0.85\n",
+ "\n",
+ "#Calculation\n",
+ "Pt = Pc*(1+ (m**2/2.0))\n",
+ "Psb_both =Pt-Pc\n",
+ "Psb_one = Psb_both/2.0\n",
+ "\n",
+ "#Result\n",
+ "print\"The total power is \",round(Pt,1),\"watt\" \n",
+ "print\"The power in one sideband is \",round(Psb_one,1),\"Watt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The total power is 40.8 watt\n",
+ "The power in one sideband is 5.4 Watt\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.4 page no 108"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "R = 40\n",
+ "I = 4.8\n",
+ "m=0.9\n",
+ "\n",
+ "#Calculation\n",
+ "Pc = I**2*R\n",
+ "Pt = (I*(1+(m**2/2.0))**0.5)**2*R\n",
+ "Psb = Pt-Pc\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) The carrier power is \",Pc,\" watt\"\n",
+ "print\"(b) Total power = \",round(Pt,0),\"watt\"\n",
+ "print\"(c) Sideband Power = \",round(Psb,1),\"watt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The carrier power is 921.6 watt\n",
+ "(b) Total power = 1295.0 watt\n",
+ "(c) Sideband Power = 373.2 watt\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.5 page no 108"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "It = 5.1\n",
+ "Ic =4.8\n",
+ "\n",
+ "#Calculation\n",
+ "m=(2*((It/Ic)**2-1))**0.5\n",
+ "\n",
+ "#Result\n",
+ "print\"The percentage of modulation is \",round(m*100,0)\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The percentage of modulation is 51.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.6 page no 109"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "m = 0.9\n",
+ "Pc = 921.6\n",
+ "\n",
+ "#calculation\n",
+ "Psb = (m**2*Pc)/4.0\n",
+ "\n",
+ "#Result\n",
+ "print\"The power in one sideband \",round(Psb,1),\"Watt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The power in one sideband 186.6 Watt\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.7 page no 113"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "Vpp = 178\n",
+ "R = 75.0\n",
+ "\n",
+ "#Calculation\n",
+ "Vp =Vpp/2.0\n",
+ "Vrms = 0.707*Vp\n",
+ "PEP =(Vrms**2/R)\n",
+ "\n",
+ "#Result\n",
+ "print\"The peak envelop power is \", round(PEP,1),\"Watt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The peak envelop power is 52.8 Watt\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 3.8 page no 113"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "Vs =24\n",
+ "Im =9.3\n",
+ "\n",
+ "#Calculation\n",
+ "PEP = Vs*Im \n",
+ "Pavg1 = PEP/3.0\n",
+ "Pavg2 = PEP/4.0\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) The peak envelope power is \",PEP,\"watt\"\n",
+ "print\"(b) Average power of transmitter is \",Pavg2,\"watt to\",Pavg1,\"watt\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The peak envelope power is 223.2 watt\n",
+ "(b) Average power of transmitter is 55.8 watt to 74.4 watt\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-21 02:34:42 +0000