/contrib/ntp/html/drivers/driver37.html
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Possible License(s): MPL-2.0-no-copyleft-exception, BSD-3-Clause, LGPL-2.0, LGPL-2.1, BSD-2-Clause, 0BSD, JSON, AGPL-1.0, GPL-2.0
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 3<html> 4 5 <head> 6 <meta http-equiv="content-type" content="text/html;charset=iso-8859-1"> 7 <title>Forum Graphic GPS Dating station</title> 8 <link href="scripts/style.css" type="text/css" rel="stylesheet"> 9 </head> 10 11 <body> 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> 47 <hr> 48 <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 49 </body> 50 51</html>