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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Forum Graphic GPS Dating station</title>
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<h3>Forum Graphic GPS Dating station</h3>
<hr>
<h4>Synopsis</h4>
<p>Address: 127.127.37.<i>u</i><br>
Reference ID: <tt>GPS</tt><br>
Driver ID: <tt>GPS</tt><br>
Parallel Port: <tt>/dev/fgclock<i>u</i></tt></p>
<h4>Description</h4>
<p>This driver supports the Forum Graphic GPS Dating station sold by <a href="http://www.emr.fr/gpsclock.html">EMR company</a>.</p>
<p>Unfortunately sometime FG GPS start continues reporting of the same date. The only way to fix this problem is GPS power cycling and ntpd restart after GPS power-up.</p>
<p>After Jan,10 2000 my FG GPS unit start send a wrong answer after 10:00am till 11:00am. It repeat hour value in result string twice. I wroite a small code to avoid such problem. Unfortunately I have no second FG GPS unit to evaluate this problem. Please let me know if your GPS has no problems after Y2K.</p>
<p></p>
<h4>Monitor Data</h4>
<p>Each timecode is written to the <tt>clockstats</tt> file in the format <tt>YYYY YD HH MI SS</tt>.</p>
<h4>Fudge Factors</h4>
<dl>
<dt><tt>time1 <i>time</i></tt>
<dd>Specifies the time offset calibration factor, in seconds and fraction, with default 0.0.
<dt><tt>time2 <i>time</i></tt>
<dd>Not used by this driver.
<dt><tt>stratum <i>number</i></tt>
<dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0.
<dt><tt>refid <i>string</i></tt>
<dd>Specifies the driver reference identifier, an ASCII string from one to four characters, with default <tt>FG</tt>.
<dt><tt>flag1 0 | 1</tt>
<dd>Not used by this driver.
<dt><tt>flag2 0 | 1</tt>
<dd>Not used by this driver.
<dt><tt>flag3 0 | 1</tt>
<dd>Not used by this driver.
<dt><tt>flag4 0 | 1</tt>
<dd>Not used by this driver.
</dl>
<hr>
<address>Dmitry Smirnov (das@amt.ru)</address>
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