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+{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:a1a2fd08204d20b25cb8797d32a1268bd037e7b99587377263388f4580e76a47"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 1 : Introduction"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.1 Page No : 4"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# Variables\n",
+ "c = 3*10**8; #in m/s\n",
+ "f = 1.*10**6; #in Hz\n",
+ "\n",
+ "# Calculations\n",
+ "lembda = c/f;\n",
+ "\n",
+ "# Results\n",
+ "print 'Wavelength (in m):',lembda\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Wavelength (in m): 300.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 15
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.2 Page No : 4"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "# Variables\n",
+ "c = 3*10**8; #in m/s\n",
+ "f = 100.*10**6; #in Hz\n",
+ "\n",
+ "# Calculations\n",
+ "lembda = c/f;\n",
+ "\n",
+ "# Results\n",
+ "print 'Wavelength (in m):',lembda\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Wavelength (in m): 3.0\n"
+ ]
+ }
+ ],
+ "prompt_number": 16
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.3 Page No : 9"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "# Variables\n",
+ "G = 175.; #absolute gain\n",
+ "\n",
+ "# Calculations\n",
+ "Gdb = 10*math.log10(175); #decibell gain\n",
+ "\n",
+ "# Results\n",
+ "print 'The decibell power gain is:',Gdb,'dB'\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The decibell power gain is: 22.4303804869 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 17
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.4 Page No : 9"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "# Variables\n",
+ "Gdb = 28.; #decibell gain\n",
+ "\n",
+ "# Calculations\n",
+ "G = 10**(Gdb/10); #Absolute power gain\n",
+ "\n",
+ "# Results\n",
+ "print 'The absolute power gain is:',G\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The absolute power gain is: 630.95734448\n"
+ ]
+ }
+ ],
+ "prompt_number": 18
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.5 Page No : 10"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "\n",
+ "# Variables\n",
+ "Gdb = 28.; #decibell gain\n",
+ "\n",
+ "# Calculations\n",
+ "G = 10**(Gdb/10); #Absolute power gain\n",
+ "Av = G**0.5; #Voltage gain\n",
+ "\n",
+ "# Results\n",
+ "print 'The voltage gain is:',Av\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The voltage gain is: 25.1188643151\n"
+ ]
+ }
+ ],
+ "prompt_number": 19
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.6 Page No : 10"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "# Variables\n",
+ "G = 0.28; #Absolute gain\n",
+ "P1 = 1; \n",
+ "P2 = .28; #28 % of input power\n",
+ "\n",
+ "# Calculations and Results\n",
+ "Gdb = 10*math.log10(G);\n",
+ "print 'Decibell gain is',Gdb,'dB'\n",
+ "\n",
+ "Ldb = 10*math.log10(P1/P2); #dB loss\n",
+ "print 'Decibell loss is:',Ldb,'dB'\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Decibell gain is -5.52841968658 dB\n",
+ "Decibell loss is: 5.52841968658 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 20
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.7 Page No : 11"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "# Variables\n",
+ "PmW = 100.; #power in mW\n",
+ "\n",
+ "# Calculations and Results\n",
+ "PdBm = 10*math.log10(PmW/1); #P in dBm level\n",
+ "print '(a). Power in dBm level is:',PdBm,'dBm'\n",
+ "\n",
+ "PdBW = PdBm-30; #P in dBW level\n",
+ "print '(b). Power in dBW level is:',PdBW,'dBW'\n",
+ "\n",
+ "PdBf = PdBm+120; #Pin dBf level\n",
+ "print '(c) Power in dBf level is:',PdBf,'dBf'\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a). Power in dBm level is: 20.0 dBm\n",
+ "(b). Power in dBW level is: -10.0 dBW\n",
+ "(c) Power in dBf level is: 140.0 dBf\n"
+ ]
+ }
+ ],
+ "prompt_number": 21
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.8 Page No : 13"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "# Variables\n",
+ "G1 = 5000.;\n",
+ "L = 2000.;\n",
+ "G2 = 400.;\n",
+ "\n",
+ "# Calculations and Results\n",
+ "G = G1*(1/L)*G2; #Absolute gain\n",
+ "print '(a) Net absolute gain is:',G\n",
+ "\n",
+ "GdB = 10*math.log10(G); #System decibell gain\n",
+ "print '(b) System Decibel gain is:',GdB,'dB'\n",
+ "\n",
+ "G1dB = 10*math.log10(G1);\n",
+ "LdB = 10*math.log10(L);\n",
+ "G2dB = 10*math.log10(G2);\n",
+ "print ('(c) Individual stage gains are:');\n",
+ "print 'G1dB = ',G1dB\n",
+ "print 'LdB = ',LdB\n",
+ "print 'G2dB = ',G2dB\n",
+ "\n",
+ "GdB = G1dB-LdB+G2dB;\n",
+ "print 'The net dB gain is:',GdB,'dB'\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) Net absolute gain is: 1000.0\n",
+ "(b) System Decibel gain is: 30.0 dB\n",
+ "(c) Individual stage gains are:\n",
+ "G1dB = 36.9897000434\n",
+ "LdB = 33.0102999566\n",
+ "G2dB = 26.0205999133\n",
+ "The net dB gain is: 30.0 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 22
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.9 Page No : 13"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "# Variables\n",
+ "G1 = 5000.;\n",
+ "L = 2000.;\n",
+ "G2 = 400.;\n",
+ "Ps = 0.1; #in mW\n",
+ "\n",
+ "# Calculations and Results\n",
+ "P1 = G1*Ps; #in mW\n",
+ "print '(a) Power level P1 is:',P1,'mW'\n",
+ "\n",
+ "P2 = P1/L; #in mW\n",
+ "print 'Line output power P2:',P2,'mW'\n",
+ "\n",
+ "Po = G2*P2; #in mW\n",
+ "print 'System output power Po:',Po,'mW'\n",
+ "\n",
+ "PsdBm = 10*math.log10(Ps/1);\n",
+ "G1dB = 10*math.log10(G1);\n",
+ "LdB = 10*math.log10(L);\n",
+ "G2dB = 10*math.log10(G2);\n",
+ "\n",
+ "print ('(b) Output power power levels in dBm are');\n",
+ "P1dBm = PsdBm+G1dB;\n",
+ "print 'P1(dBm) = ',P1dBm,'dBm'\n",
+ "\n",
+ "P2dBm = P1dBm-LdB;\n",
+ "print 'P2(dBm) = ',P2dBm,'dBm'\n",
+ "\n",
+ "PodBm = P2dBm+G2dB;\n",
+ "print 'Po(dBm) = ',PodBm,'dBm'\n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) Power level P1 is: 500.0 mW\n",
+ "Line output power P2: 0.25 mW\n",
+ "System output power Po: 100.0 mW\n",
+ "(b) Output power power levels in dBm are\n",
+ "P1(dBm) = 26.9897000434 dBm\n",
+ "P2(dBm) = -6.02059991328 dBm\n",
+ "Po(dBm) = 20.0 dBm\n"
+ ]
+ }
+ ],
+ "prompt_number": 23
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.10 Page No : 14"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "def voltage(PdBm):\n",
+ " P = 1*10**(-3)*(10**(PdBm/10));\n",
+ " return (75*P)**0.5;\n",
+ "\n",
+ "# Variables\n",
+ "S = 10.; #dBm\n",
+ "G1 = 13.; #dB\n",
+ "L1 = 26.; #dB\n",
+ "G2 = 20.; #dB\n",
+ "L2 = 29.; #dB\n",
+ "\n",
+ "# Calculations and Results\n",
+ "print '(a) The output levels are',\n",
+ "PdBm = S;\n",
+ "V = voltage(PdBm);\n",
+ "print PdBm,'1. Signal source in dBm:',PdBm,'in Volts : ',V\n",
+ "\n",
+ "PdBm = S+G1;\n",
+ "V = voltage(PdBm);\n",
+ "print '2. Line Amplifier in dBm:',PdBm,'in Volts : ',V\n",
+ "\n",
+ "PdBm = S+G1-L1;\n",
+ "V = voltage(PdBm);\n",
+ "print '3. Cable section A in dBm:',PdBm,'in Volts : ',V\n",
+ "\n",
+ "PdBm = S+G1-L1+G2;\n",
+ "V = voltage(PdBm);\n",
+ "print '4. Booster amplifier in dBm:',PdBm,'in Volts : ',V\n",
+ "\n",
+ "PdBm = S+G1-L1+G2-L2;\n",
+ "V = voltage(PdBm);\n",
+ "print '5. Cable section B in dBm:',PdBm,'in Volts : ',V\n",
+ "print ('(b). The output power to get a voltage of 6V'),\n",
+ "V = 6.; #volts\n",
+ "R = 75.; #ohm\n",
+ "Po = (V**2)/R;\n",
+ "print Po,'W';\n",
+ "PodBm = 10*math.log10(Po*1000/1);\n",
+ "print 'power in dBm',PodBm,'dBm'\n",
+ "\n",
+ "GrdB = PodBm-PdBm;\n",
+ "print 'The required gain is',GrdB,'dB'\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The output levels are 10.0 1. Signal source in dBm: 10.0 in Volts : 0.866025403784\n",
+ "2. Line Amplifier in dBm: 23.0 in Volts : 3.86839338256\n",
+ "3. Cable section A in dBm: -3.0 in Volts : 0.193878937799\n",
+ "4. Booster amplifier in dBm: 17.0 in Volts : 1.93878937799\n",
+ "5. Cable section B in dBm: -12.0 in Volts : 0.0687908430214\n",
+ "(b). The output power to get a voltage of 6V 0.48 W\n",
+ "power in dBm 26.8124123738 dBm\n",
+ "The required gain is 38.8124123738 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 25
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 1.11 Page No : 17"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import math \n",
+ "\n",
+ "# Variables\n",
+ "P = 5.; #In mW\n",
+ "N = 100.*10**-6; #in mW\n",
+ "\n",
+ "# Calculations and Results\n",
+ "S2N = P/N;\n",
+ "print '(a) Absolute signal to noise ratio :',S2N\n",
+ "\n",
+ "S2NdB = 10*math.log10(S2N);\n",
+ "print '(b) dB signal to noise ratio is:',S2NdB,'dB'\n",
+ "\n",
+ "PdBm = 10*math.log10(P/1);\n",
+ "print '(c) Signal Power is',PdBm,'dBm'\n",
+ "\n",
+ "NdBm = 10*math.log10(N/1);\n",
+ "print 'Noise power is',NdBm,'dBm'\n",
+ "\n",
+ "S2NdB = PdBm-NdBm;\n",
+ "print 'Decinel S/N ratio is',S2NdB,'dB'\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) Absolute signal to noise ratio : 50000.0\n",
+ "(b) dB signal to noise ratio is: 46.9897000434 dB\n",
+ "(c) Signal Power is 6.98970004336 dBm\n",
+ "Noise power is -40.0 dBm\n",
+ "Decinel S/N ratio is 46.9897000434 dB\n"
+ ]
+ }
+ ],
+ "prompt_number": 27
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+} \ No newline at end of file
generated by cgit (git 2.34.1) at 2024-12-22 14:53:52 +0000