83 lines
2.3 KiB
HTML
83 lines
2.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN">
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<html>
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<head>
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<title>Conrad parallel port radio clock</title>
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</head>
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<body>
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<h3>Conrad parallel port radio clock</h3>
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<hr>
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<h4>Synopsis</h4>
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<p>Address: 127.127.35.<i>u</i><br>
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Reference ID: <tt>PCF</tt><br>
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Driver ID: <tt>PCF</tt><br>
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Parallel Port: <tt>/dev/pcfclock<i>u</i></tt>
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</p>
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<h4>Description</h4>
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<p>This driver supports the parallel port radio clocks sold by <a
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href="http://www.conrad-electronic.com/">Conrad Electronic</a> under
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order numbers 967602 and 642002. The battery-powered radio clock is
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put between a parallel port and your printer. It receives the legal
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German time, which is either CET or CEST, from the DCF77 transmitter
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and uses it to set internal quartz clock. The DCF77 transmitter is
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located near to Frankfurt/Main and covers a radius of more than 1500
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kilometers.
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<p>The driver requires that the pcfclock device driver be installed.
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A device driver for Linux 2.2 is available at
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<a href="http://home.pages.de/~voegele/pcf.html">the pcfclock driver
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page</a>.
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</p>
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<p>The driver uses C library functions to convert the received
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timecode to UTC and therefore requires that the local timezone be
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CET/CEST. If your server is not located in Central Europe, you have
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to set the environment variable TZ to CET before <tt>ntpd</tt> is
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started.</p>
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<h4>Monitor Data</h4>
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<p>Each timecode is written to the <tt>clockstats</tt> file in the format
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<tt>YYYY MM DD HH MI SS</tt>.</p>
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<h4>Fudge Factors</h4>
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<dl>
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<dt><tt>time1 <i>time</i></tt></dt>
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<dd>Specifies the time offset calibration factor, in seconds and fraction,
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with default 0.0.</dd>
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<dt><tt>time2 <i>time</i></tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>stratum <i>number</i></tt></dt>
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<dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0.
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</dd>
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<dt><tt>refid <i>string</i></tt></dt>
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<dd>Specifies the driver reference identifier, an ASCII string from one to
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four characters, with default <tt>PCF</tt>.</dd>
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<dt><tt>flag1 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>flag2 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>flag3 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>flag4 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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</dl>
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<hr>
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<address>Andreas Voegele (andreas.voegele@gmx.de)</address>
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</body>
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</html>
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