freebsd-src/contrib/ntp/html/driver32.htm
1999-12-09 13:01:21 +00:00

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<title>Chrono-log K-series WWVB receiver</title>
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<h3>Chrono-log K-series WWVB receiver</h3>
<hr>
<h4>Synopsis</h4>
Address: 127.127.32.<i>u</i><br>
Reference ID: <TT>CHRONOLOG</TT><br>
Driver ID: <tt>CHRONOLOG</tt><br>
Serial Port: <tt>/dev/chronolog<i>u</i></tt>; 2400 bps, 8-bits,
no parity<br>
<br>Features: <tt>(none)</tt>
<h4>Description</h4>
This driver supports the Chrono-log K-series WWVB receiver. This is a
very old receiver without provisions for leap seconds, quality codes,
etc. It assumes output in the local time zone, and that the C library
mktime()/localtime() routines will correctly convert back and forth
between local and UTC. There is a hack in the driver for permitting
UTC, but it has not been tested.
<P>Most of this code is originally from refclock_wwvb.c with thanks. It
has been so mangled that wwvb is not a recognizable ancestor.
<pre>
Timecode format: Y yy/mm/ddCLZhh:mm:ssCL
Y - year/month/date line indicator
yy/mm/dd -- two-digit year/month/day
C - \r (carriage return)
L - \n (newline)
Z - timestamp indicator
hh:mm:ss - local time
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<address></address>
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Last modified: Sun Feb 14 11:57:27 EST 1999
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