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Diffstat (limited to 'contrib/ntp/html/driver35.htm')
| -rw-r--r-- | contrib/ntp/html/driver35.htm | 48 |
1 files changed, 23 insertions, 25 deletions
diff --git a/contrib/ntp/html/driver35.htm b/contrib/ntp/html/driver35.htm index d3b77e0..0e6aebf 100644 --- a/contrib/ntp/html/driver35.htm +++ b/contrib/ntp/html/driver35.htm @@ -1,4 +1,4 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN"> +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html> <head> <title>Conrad parallel port radio clock</title> @@ -13,32 +13,30 @@ <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/pcfclock<i>u</i></tt> +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 clocks sold by <a -href="http://www.conrad-electronic.com/">Conrad Electronic</a> under -order numbers 967602 and 642002. The battery-powered radio 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 internal quartz clock. The DCF77 transmitter is -located near to Frankfurt/Main and covers a radius of more than 1500 -kilometers. - -<p>The driver requires that the pcfclock device driver be installed. -A device driver for Linux 2.2 is available at -<a href="http://home.pages.de/~voegele/pcf.html">the pcfclock driver -page</a>. +<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> -<p>The driver uses C library functions to convert the received -timecode to UTC and therefore requires that the local timezone be -CET/CEST. If your server is not located in Central Europe, you have -to set the environment variable TZ to CET before <tt>ntpd</tt> is -started.</p> - <h4>Monitor Data</h4> <p>Each timecode is written to the <tt>clockstats</tt> file in the format @@ -49,7 +47,7 @@ started.</p> <dl> <dt><tt>time1 <i>time</i></tt></dt> <dd>Specifies the time offset calibration factor, in seconds and fraction, -with default 0.0.</dd> +with default 0.1725.</dd> <dt><tt>time2 <i>time</i></tt></dt> <dd>Not used by this driver.</dd> @@ -66,7 +64,8 @@ four characters, with default <tt>PCF</tt>.</dd> <dd>Not used by this driver.</dd> <dt><tt>flag2 0 | 1</tt></dt> -<dd>Not used by this driver.</dd> +<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> @@ -76,7 +75,6 @@ four characters, with default <tt>PCF</tt>.</dd> </dl> <hr> -<address>Andreas Voegele (andreas.voegele@gmx.de)</address> - +<address>Andreas Voegele <voegelas@users.sourceforge.net></address> </body> </html> |
