{
"metadata": {
"name": "",
"signature": "sha256:349ae7afdee1d1b3c3dc4037b8dc3bb200738707d16369e5edfee0d065859f9b"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 9: Signal Analysis"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex9.1:pg-277"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To find dynamic range of spectrum analyser\n",
"\n",
"# Given data\n",
"I_p = +25.0; #Third order intercept point in dBm\n",
"MDS = -85.0; #noise level in dBm\n",
"\n",
"#Calculations\n",
"\n",
"dynamic_range = 2/3.0*(I_p -MDS);\n",
"print \"The dynamic range of the spectrum analyser =\",int(dynamic_range),\" dB\"\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The dynamic range of the spectrum analyser = 73 dB\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex9.2:pg-277"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To find minimum detectable signal\n",
"\n",
"import math\n",
"\n",
"# Given data\n",
"NF = 20.0; #Noise figure in dB\n",
"BW = 1*10.0**3; #Bandwidth in Hz\n",
"\n",
"#Calculations\n",
"MDS=-114+10*math.log10((BW/(1*10.0**6)))+NF\n",
"print \"The minimum detectable signal of the spectrum analyser = \",int(MDS),\" dBm\"\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The minimum detectable signal of the spectrum analyser = -124 dBm\n"
]
}
],
"prompt_number": 13
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex9.3:pg-285"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# To find dynamic range and total frequency display\n",
"\n",
"import math\n",
"# Given data\n",
"T = 4.0; #Sample window in s\n",
"f_s = 20*10.0**3; # sample frequency in Hz\n",
"N = 10.0; #no of bits\n",
"\n",
"#Calculations\n",
"f_r = 1/T;\n",
"f_h = f_s/2.0; \n",
"R_d = 20*math.log10(2.0**N);\n",
"\n",
"print \"The ratio of the spectral calculation = \",round(f_r,2),\" Hz\\n\"\n",
"print \"The maximum calculated spectral frequency = \",int(f_h),\" Hz\\n\"\n",
"print \"The dynamic range = \",int(R_d),\" dB\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The ratio of the spectral calculation = 0.25 Hz\n",
"\n",
"The maximum calculated spectral frequency = 10000 Hz\n",
"\n",
"The dynamic range = 60 dB\n"
]
}
],
"prompt_number": 15
}
],
"metadata": {}
}
]
}