52 lines
1.4 KiB
HTML
52 lines
1.4 KiB
HTML
<html>
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<head>
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<link href="style.css" rel="stylesheet" type="text/css" />
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<title>osmocom-analog</title>
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</head>
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<body>
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<center><table><tr><td>
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<h2><center>TACS</center></h2>
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<center><img src="tacs.jpg"/></center>
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<p>
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Total Access Communication System (TACS) and ETACS are mostly-obsolete variants of Advanced Mobile Phone System (AMPS) which was announced as the choice for the first two UK national cellular systems in Feb 1983.
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</p>
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<ul>
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<li>Frequency range base station: 935.0125 MHz - 949.9875 MHz
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<li>Frequency range mobile station: 890.0125 MHz - 904.9875 MHz
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<li>Control channels: 21 for System A
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<li>Voice channels: 289 for System A
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<li>Control channels: 21 for System B
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<li>Voice channels: 289 for System B
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<li>Duplex distance: 45 MHz
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<li>Channel spacing: 25 KHz
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<li>Voice modulation: FM
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<li>Signaling modulation: carrier FSK
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<li>Frequency deviation: 6.4 KHz (FSK)
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<li>Mobile station transmit power: 10 or 4 Watts (vehicular) 1.6 or 0.63 Watts
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<li>Base station transmit power: ??? (around 50 Watts)
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</ul>
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<p>
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TACS is the UK version of the AMPS.
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There are three major differences:
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</p>
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<ul>
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<li>Different channel frequencies
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<li>6,400 Hz signaling rate (instead of 8,000 Hz)
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<li>Encoding of mobile station number
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</ul>
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<p>
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Refer to <a href="amps.html">AMPS</a> documentation, but use executable 'tacs' instead of 'amps'.
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</p>
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<hr><center>[<a href="index.html">Back to main page</a>]</center><hr>
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</td></tr></table></center>
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</body>
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</html>
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