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{
"metadata": {
"name": "",
"signature": "sha256:6738b73e6fb4913114449836a25c14169c484a93e5e60fcba9b0e4a9815c8f56"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 8 Radio transmitters"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 8.1 Page no 249"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"f = 16*10**6\n",
"ppm = 200\n",
"frequency_variation = 200 *16 \n",
"\n",
"#Calculation\n",
"min_f = f - frequency_variation\n",
"max_f = f + frequency_variation\n",
"\n",
"#Reslt\n",
"print\"The minimum and maximum frequencies for the crystal of 16 Mhz with stability of 200 are \",min_f,\"Hz and\",max_f,\"Hz respectively\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The minimum and maximum frequencies for the crystal of 16 Mhz with stability of 200 are 15996800 Hz and 16003200 Hz respectively\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 8.2 Page no 250"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"f =14.9*10**6\n",
"mul_factor = 2*3*3\n",
"stability_ppm =300\n",
"variation = 0.0003\n",
"\n",
"#Calculation\n",
"total_variation = variation* mul_factor\n",
"fout = f * mul_factor\n",
"frequency_variation = fout*total_variation\n",
"f_lower = fout - frequency_variation\n",
"f_upper = fout + frequency_variation\n",
"\n",
"#Result\n",
"print\"(a) The output frequency of the transmitter is \",fout/10**6,\"MHz\"\n",
"print\"(b) The maximum and minimum frequencies of the transmitter are \",round(f_lower/10**6,2),\"Mhz and \",round(f_upper/10**6,2),\"Mhz\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"(a) The output frequency of the transmitter is 268.2 MHz\n",
"(b) The maximum and minimum frequencies of the transmitter are 266.75 Mhz and 269.65 Mhz\n"
]
}
],
"prompt_number": 2
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 8.3 Page no 259"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#given\n",
"f = 10*10**6\n",
"div_factor = 100.0\n",
"A =63\n",
"N = 285\n",
"M=32\n",
"\n",
"#Calculation\n",
"ref = f/div_factor\n",
"R =M*N+A\n",
"fout= R*ref\n",
"\n",
"#Result\n",
"print\"The output frequency of the synthesizer is \",fout/10**6,\"MHz\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output frequency of the synthesizer is 918.3 MHz\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 8.4 Page no 259"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Given\n",
"f = 10*10**6\n",
"div_factor = 100.0\n",
"A =64\n",
"N = 285\n",
"M=32\n",
"\n",
"#Calculation\n",
"ref = f/div_factor\n",
"R =M*N+A\n",
"fout= R*ref\n",
"\n",
"#Result\n",
"print\"The output frequency of the synthesizer is \",fout/10**6,\"MHz\"\n",
"print\"The step change is \",fout/10**6-918.3,\"MHz\"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The output frequency of the synthesizer is 918.4 MHz\n",
"The step change is 0.1 MHz\n"
]
}
],
"prompt_number": 4
}
],
"metadata": {}
}
]
}
|
