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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
+<html>
+<head>
+<meta name="generator" content="HTML Tidy, see www.w3.org">
+<title>JJY Receivers</title>
+</head>
+<body>
+<h3>JJY Receivers</h3>
+
+<hr>
+<h4>Synopsis</h4>
+
+Address: 127.127.40.<i>u</i> <br>
+Reference ID: <tt>JJY</tt> <br>
+Driver ID: <tt>JJY</tt> <br>
+Serial Port: <tt>/dev/jjy<i>u</i></tt>; 9600 baud, 8-bits, no
+parity, 1 stop bit
+
+<h4>Description</h4>
+
+<p>This driver supports the following JJY receivers sold in
+Japan.</p>
+
+<ul>
+<li>
+<p>Tristate Ltd. JJY01 <a href=
+"http://www.tristate.ne.jp/rf-clock.htm">
+http://www.tristate.ne.jp/rf-clock.htm</a> (Japanese only)<br>
+Time code format<br>
+</p>
+
+<table>
+<tr>
+<td>Command</td>
+<td>Reply</td>
+</tr>
+
+<tr>
+<td><tt>date&lt;CR&gt;&lt;LF&gt;</tt></td>
+<td><tt>YYYY/MM/DD WWW&lt;CR&gt;&lt;LF&gt;</tt></td>
+</tr>
+
+<tr>
+<td><tt>stim&lt;CR&gt;&lt;LF&gt;</tt></td>
+<td><tt>HH:MM:SS&lt;CR&gt;&lt;LF&gt;</tt></td>
+</tr>
+</table>
+</li>
+
+<li>
+<p>C-DEX Co.,Ltd. JST2000 <a href="http://www.c-dex.co.jp/">
+http://www.c-dex.co.jp/</a> (Japanese only)<br>
+Time code format<br>
+</p>
+
+<table>
+<tr>
+<td>Command</td>
+<td>Reply</td>
+</tr>
+
+<tr>
+<td><tt>&lt;ENQ&gt;1J&lt;ETX&gt;</tt></td>
+<td><tt>&lt;STX&gt;JYYMMDD HHMMSSS&lt;ETX&gt;</tt></td>
+</tr>
+</table>
+</li>
+</ul>
+
+<p>JJY is the radio station which transmites the JST (Japan
+Standard Time) in long wave radio. The station JJY is operated by
+the Communication Research Laboratory. An operating announcement
+and some information are avaiable from <a href=
+"http://www.crl.go.jp/">http://www.crl.go.jp/</a> (English and
+Japanese)<a href="http://jjy.crl.go.jp/">http://jjy.crl.go.jp/</a>
+(Written in Japanese only</p>
+
+<p>The user is expected to provide a symbolic link to an available
+serial port device. This is typically performed by a command such
+as:</p>
+
+<p><tt>ln -s /dev/ttyS0 /dev/jjy0</tt></p>
+
+<p>Windows NT does not support symbolic links to device files.
+COM<i>X</i>: is the unit used by the driver, based on the refclock
+unit number, where unit 1 corresponds to COM1: and unit 3
+corresponds to COM3:</p>
+
+<h4>Monitor Data</h4>
+
+<p>The driver writes each timecode as received to the <tt>
+clockstats</tt> file.</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 0.0.</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>WWVB</tt>.</dd>
+
+<dt><tt>flag1 0 | 1</tt></dt>
+
+<dd>Not used by this driver.</dd>
+
+<dt><tt>flag2 0 | 1</tt></dt>
+
+<dd>Not used by this driver.</dd>
+
+<dt><tt>flag3 0 | 1</tt></dt>
+
+<dd>Not used by this driver.</dd>
+
+<dt><tt>flag4 0 | 1</tt></dt>
+
+<dd>Enable verbose <tt>clockstats</tt> recording if set.</dd>
+</dl>
+
+<hr>
+<a href="index.htm"><img align="left" src="pic/home.gif" alt=
+"gif"></a>
+
+<address><a href="mailto:mills@udel.edu">David L. Mills
+&lt;mills@udel.edu&gt;</a></address>
+</body>
+</html>
+