contrib/ntp/html/drivers/driver37.html

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   7                 <title>Forum Graphic GPS Dating station</title>
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  12                 <h3>Forum Graphic GPS Dating station</h3>
  13                 <hr>
  14                 <h4>Synopsis</h4>
  15                 <p>Address: 127.127.37.<i>u</i><br>
  16                         Reference ID: <tt>GPS</tt><br>
  17                         Driver ID: <tt>GPS</tt><br>
  18                         Parallel Port: <tt>/dev/fgclock<i>u</i></tt></p>
  19                 <h4>Description</h4>
  20                 <p>This driver supports the Forum Graphic GPS Dating station sold by <a href="http://www.emr.fr/gpsclock.html">EMR company</a>.</p>
  21                 <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>
  22                 <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>
  23                 <p></p>
  24                 <h4>Monitor Data</h4>
  25                 <p>Each timecode is written to the <tt>clockstats</tt> file in the format <tt>YYYY YD HH MI SS</tt>.</p>
  26                 <h4>Fudge Factors</h4>
  27                 <dl>
  28                         <dt><tt>time1 <i>time</i></tt>
  29                         <dd>Specifies the time offset calibration factor, in seconds and fraction, with default 0.0.
  30                         <dt><tt>time2 <i>time</i></tt>
  31                         <dd>Not used by this driver.
  32                         <dt><tt>stratum <i>number</i></tt>
  33                         <dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0.
  34                         <dt><tt>refid <i>string</i></tt>
  35                         <dd>Specifies the driver reference identifier, an ASCII string from one to four characters, with default <tt>FG</tt>.
  36                         <dt><tt>flag1 0 | 1</tt>
  37                         <dd>Not used by this driver.
  38                         <dt><tt>flag2 0 | 1</tt>
  39                         <dd>Not used by this driver.
  40                         <dt><tt>flag3 0 | 1</tt>
  41                         <dd>Not used by this driver.
  42                         <dt><tt>flag4 0 | 1</tt>
  43                         <dd>Not used by this driver.
  44                 </dl>
  45                 <hr>
  46                 <address>Dmitry Smirnov (das@amt.ru)</address>
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