{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Chapter 8: AMPLITUDE MODULATION" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 8.11_1: exampple_4.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "clc;\n", "//page no 274\n", "//prob no. 8.11.1\n", "//RC load ckt for diode detector with c=1000pF in paralel with R=10Kohm\n", "fm=10*10^3;//modulation freq\n", "c=1000*10^-12;R=10*10^3;\n", "Yp=(1/R)+((%i)*2*(%pi)*fm*c);//admittance of RC load\n", "disp(Yp);\n", "Zp=1/sqrt((real(Yp)^2)+(imag(Yp)^2));\n", "disp(Zp);\n", "//Determination of max modulation index\n", "m=Zp/R;\n", "disp(m,'The max modulation index is');" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 8.3_1: example_1.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "clc;\n", "//page no 257\n", "//prob no. 8.3.1\n", "//A modulating signal with zero dc component & vpp=11,vcp=10 carrier peak voltage\n", "vpp=11;//peak to peak voltage of modulating signal\n", "vcp=10;//carrier peak voltage\n", "//Determination of modulation index\n", "E_max=vcp+(vpp/2);\n", "E_min=vcp-(vpp/2);\n", "m=(E_max-E_min)/(E_max+E_min);\n", "disp(m,'The modulation index is');\n", "//determination of kratio of side lengths\n", "L1_L2=E_max/E_min;\n", "disp(L1_L2,'The ratio of side lengths L1/L2 is');" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 8.5_1: example_2.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "clc;\n", "//page no 260\n", "//prob no. 8.5.1\n", "//A carrier with fc=10MHz & vp=10V modulated with fm=5kHz & Vm=6V\n", "fc=10*10^6;//Carrier freq\n", "fm=5*10^3;//Modullating freq\n", "vp=10;vm=6;\n", "//Determination of modulation index\n", "m=vm/vp;\n", "disp(m,'The modulation index is');" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 8.7_1: example_3.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "clc;\n", "//page no 263\n", "//prob no. 8.7.1\n", "//AM radio Tx=10A when unmodulated & 12A when modulated\n", "I=12;Ic=10;\n", "//Determination of modulation index\n", "m=sqrt(2*(((I/Ic)^2)-1));\n", "disp(m,'The modulation index is');" ] } ], "metadata": { "kernelspec": { "display_name": "Scilab", "language": "scilab", "name": "scilab" }, "language_info": { "file_extension": ".sce", "help_links": [ { "text": "MetaKernel Magics", "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" } ], "mimetype": "text/x-octave", "name": "scilab", "version": "0.7.1" } }, "nbformat": 4, "nbformat_minor": 0 }