2017-06-10 13:30:20 +00:00
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<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>Radiocom 2000</center></h2>
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<center><img src="radiocom2000.jpg"/></center>
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<center><h1>*this doc is under construction*</h1></center>
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<ul>
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<li><a href="#history">History</a>
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<li><a href="#howitworks">How it works</a>
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<li><a href="#basestation">Setup of a base station</a>
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</ul>
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<p class="toppic">
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<a name="history"></a>
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History
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</p>
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2017-10-03 08:48:50 +00:00
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<p>
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Radiocom 2000 (sometimes R2000) was a cellular network used in France.
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The network was developed by France Telekom and Matra and became the third mobile network.
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There are many similarities to the NMT network, but it was a complete own design.
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Development started in 1981 and the network was launched in Paris in 1985, it gradually replaced the second network "correspondance publique".
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It was a cellular system, so frequencies could be used efficiently.
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The system was capable of allocating channels dynamically.
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Handover was implemented later and called RHD "Réseau Haute Densité" (network with high desity).
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It was possible to run private base station, where own mobiles were allowed to call only.
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In 1988, it had 60,000 subscribers and more than 90% of devices are installed in vehicles.
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Originally the 200 MHz and 400 MHz bands were used.
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Due to congesting in 1990, the 900 MHz band was introduced.
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The network was closed for the exclusive benefit of the standard GSM in July 28th 2000.
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</p>
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<p>
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<ul>
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2018-12-23 18:42:42 +00:00
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<li>Frequency range UHF (Band 1): 424.800 - 427.9875 MHz (down-link); 414.800 - 417.9875 MHz (up-link)
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<li>Frequency range VHF (Band 3): 169.800 - 172.9875 MHz (down-link); 165.200 - 168.3875 MHz (up-link)
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<li>See software option "-B list" for other bands
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2021-01-01 21:11:48 +00:00
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<li>256 voice or control channels
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2017-10-03 08:48:50 +00:00
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<li>Duplex distance: 10 MHz
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<li>Channel spacing: 12.5 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: 1500 Hz ??? (Voice); 1425 Hz (FSK)
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<li>Mobile station transmit power: 1 or 6..10 Watts
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<li>Features: Speech Compandor (BS->MS only), Group calls
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</ul>
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</p>
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<p>
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</p>
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2017-06-10 13:30:20 +00:00
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<p class="toppic">
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<a name="howitworks"></a>
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How it works
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</p>
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2017-09-15 22:14:41 +00:00
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<p>
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Please refer to
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<a href="standard_r2000_by_jolly.pdf">standard_r2000_by_jolly.pdf</a>
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for a description of the standard.
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</p>
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2017-06-10 13:30:20 +00:00
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<p class="toppic">
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<a name="basestation"></a>
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Setup of a base station
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2018-12-23 18:42:42 +00:00
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<br><br>
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TBD: Tested band 1 and 3 so far!
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2017-06-10 13:30:20 +00:00
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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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