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| author | Ollivier Robert <roberto@FreeBSD.org> | 2008-08-17 17:37:33 +0000 |
|---|---|---|
| committer | Ollivier Robert <roberto@FreeBSD.org> | 2008-08-17 17:37:33 +0000 |
| commit | cce65f439697627afbccf5a67035a957bb4d784a (patch) | |
| tree | 16d100fbc9dae63888d48b464e471ba0e5065193 /html/driver35.htm | |
| parent | 8c24a1e0ffd629427f94da1b681600008030c41a (diff) | |
| download | src-cce65f439697627afbccf5a67035a957bb4d784a.tar.gz src-cce65f439697627afbccf5a67035a957bb4d784a.zip | |
Flatten the dist and various 4.n.n trees in preparation of future ntp imports.
Notes
Notes:
svn path=/vendor/ntp/dist/; revision=181800
Diffstat (limited to 'html/driver35.htm')
| -rw-r--r-- | html/driver35.htm | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/html/driver35.htm b/html/driver35.htm new file mode 100644 index 000000000000..0e6aebf96e9c --- /dev/null +++ b/html/driver35.htm @@ -0,0 +1,80 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> +<html> +<head> +<title>Conrad parallel port radio clock</title> +</head> +<body> + +<h3>Conrad parallel port radio clock</h3> +<hr> + +<h4>Synopsis</h4> + +<p>Address: 127.127.35.<i>u</i><br> +Reference ID: <tt>PCF</tt><br> +Driver ID: <tt>PCF</tt><br> +Parallel Port: <tt>/dev/pcfclocks/<i>u</i></tt> or <tt>/dev/pcfclock<i>u</i></tt> +</p> + +<h4>Description</h4> + +<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>The pcfclock device driver is required in order to use this +reference clock driver. Currently device drivers for +<a href="http://home.pages.de/~voegele/pcf.html">Linux</a> and +<a href="http://schumann.cx/pcfclock/">FreeBSD</a> are available.</p> + +<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> + +<h4>Monitor Data</h4> + +<p>Each timecode is written to the <tt>clockstats</tt> file in the format +<tt>YYYY MM DD HH MI SS</tt>.</p> + +<h4>Fudge Factors</h4> + +<dl> +<dt><tt>time1 <i>time</i></tt></dt> +<dd>Specifies the time offset calibration factor, in seconds and fraction, +with default 0.1725.</dd> + +<dt><tt>time2 <i>time</i></tt></dt> +<dd>Not used by this driver.</dd> + +<dt><tt>stratum <i>number</i></tt></dt> +<dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0. +</dd> + +<dt><tt>refid <i>string</i></tt></dt> +<dd>Specifies the driver reference identifier, an ASCII string from one to +four characters, with default <tt>PCF</tt>.</dd> + +<dt><tt>flag1 0 | 1</tt></dt> +<dd>Not used by this driver.</dd> + +<dt><tt>flag2 0 | 1</tt></dt> +<dd>If set to 1, the radio clock's synchronisation status bit is +ignored, ie the timecode is used without a check.</dd> + +<dt><tt>flag3 0 | 1</tt></dt> +<dd>Not used by this driver.</dd> + +<dt><tt>flag4 0 | 1</tt></dt> +<dd>Not used by this driver.</dd> +</dl> + +<hr> +<address>Andreas Voegele <voegelas@users.sourceforge.net></address> +</body> +</html> |