19c2daa00SOllivier Robert<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 29c2daa00SOllivier Robert 39c2daa00SOllivier Robert<html> 49c2daa00SOllivier Robert 59c2daa00SOllivier Robert <head> 6ea906c41SOllivier Robert <meta http-equiv="content-type" content="text/html;charset=iso-8859-1"> 79c2daa00SOllivier Robert <title>Conrad parallel port radio clock</title> 8ea906c41SOllivier Robert <link href="scripts/style.css" type="text/css" rel="stylesheet"> 99c2daa00SOllivier Robert </head> 109c2daa00SOllivier Robert 119c2daa00SOllivier Robert <body> 129c2daa00SOllivier Robert <h3>Conrad parallel port radio clock</h3> 139c2daa00SOllivier Robert <hr> 149c2daa00SOllivier Robert <h4>Synopsis</h4> 159c2daa00SOllivier Robert <p>Address: 127.127.35.<i>u</i><br> 169c2daa00SOllivier Robert Reference ID: <tt>PCF</tt><br> 179c2daa00SOllivier Robert Driver ID: <tt>PCF</tt><br> 189c2daa00SOllivier Robert Parallel Port: <tt>/dev/pcfclocks/<i>u</i></tt> or <tt>/dev/pcfclock<i>u</i></tt></p> 199c2daa00SOllivier Robert <h4>Description</h4> 209c2daa00SOllivier Robert <p>This driver supports the parallel port radio clock sold by <a href="http://www.conrad-electronic.com/">Conrad Electronic</a> under order numbers 967602 and 642002. This clock is put between a parallel port and your printer. It receives the legal German time, which is either CET or CEST, from the DCF77 transmitter and uses it to set its internal quartz clock. The DCF77 transmitter is located near to Frankfurt/Main and covers a radius of more than 1500 kilometers.</p> 219c2daa00SOllivier Robert <p>The pcfclock device driver is required in order to use this reference clock driver. Currently device drivers for <a href="http://home.pages.de/%7evoegele/pcf.html">Linux</a> and <a href="http://schumann.cx/pcfclock/">FreeBSD</a> are available.</p> 229c2daa00SOllivier Robert <p>This driver uses C library functions to convert the received timecode to UTC and thus requires that the local timezone be CET or CEST. If your server is not located in Central Europe you have to set the environment variable TZ to CET before starting <tt>ntpd</tt>.</p> 239c2daa00SOllivier Robert <h4>Monitor Data</h4> 249c2daa00SOllivier Robert <p>Each timecode is written to the <tt>clockstats</tt> file in the format <tt>YYYY MM DD HH MI SS</tt>.</p> 259c2daa00SOllivier Robert <h4>Fudge Factors</h4> 269c2daa00SOllivier Robert <dl> 279c2daa00SOllivier Robert <dt><tt>time1 <i>time</i></tt> 289c2daa00SOllivier Robert <dd>Specifies the time offset calibration factor, in seconds and fraction, with default 0.1725. 299c2daa00SOllivier Robert <dt><tt>time2 <i>time</i></tt> 309c2daa00SOllivier Robert <dd>Not used by this driver. 319c2daa00SOllivier Robert <dt><tt>stratum <i>number</i></tt> 329c2daa00SOllivier Robert <dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0. 339c2daa00SOllivier Robert <dt><tt>refid <i>string</i></tt> 349c2daa00SOllivier Robert <dd>Specifies the driver reference identifier, an ASCII string from one to four characters, with default <tt>PCF</tt>. 359c2daa00SOllivier Robert <dt><tt>flag1 0 | 1</tt> 369c2daa00SOllivier Robert <dd>Not used by this driver. 379c2daa00SOllivier Robert <dt><tt>flag2 0 | 1</tt> 389c2daa00SOllivier Robert <dd>If set to 1, the radio clock's synchronisation status bit is ignored, ie the timecode is used without a check. 399c2daa00SOllivier Robert <dt><tt>flag3 0 | 1</tt> 409c2daa00SOllivier Robert <dd>Not used by this driver. 419c2daa00SOllivier Robert <dt><tt>flag4 0 | 1</tt> 429c2daa00SOllivier Robert <dd>Not used by this driver. 439c2daa00SOllivier Robert </dl> 449c2daa00SOllivier Robert <hr> 45ea906c41SOllivier Robert <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 469c2daa00SOllivier Robert </body> 479c2daa00SOllivier Robert 489c2daa00SOllivier Robert</html>