142 lines
3.2 KiB
HTML
142 lines
3.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<title>JJY Receivers</title>
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</head>
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<body>
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<h3>JJY Receivers</h3>
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<hr>
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<h4>Synopsis</h4>
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Address: 127.127.40.<i>u</i> <br>
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Reference ID: <tt>JJY</tt> <br>
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Driver ID: <tt>JJY</tt> <br>
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Serial Port: <tt>/dev/jjy<i>u</i></tt>; 9600 baud, 8-bits, no
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parity, 1 stop bit
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<h4>Description</h4>
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<p>This driver supports the following JJY receivers sold in
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Japan.</p>
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<ul>
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<li>
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<p>Tristate Ltd. JJY01 <a href=
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"http://www.tristate.ne.jp/rf-clock.htm">
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http://www.tristate.ne.jp/rf-clock.htm</a> (Japanese only)<br>
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Time code format<br>
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</p>
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<table>
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<tr>
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<td>Command</td>
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<td>Reply</td>
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</tr>
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<tr>
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<td><tt>date<CR><LF></tt></td>
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<td><tt>YYYY/MM/DD WWW<CR><LF></tt></td>
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</tr>
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<tr>
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<td><tt>stim<CR><LF></tt></td>
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<td><tt>HH:MM:SS<CR><LF></tt></td>
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</tr>
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</table>
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</li>
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<li>
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<p>C-DEX Co.,Ltd. JST2000 <a href="http://www.c-dex.co.jp/">
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http://www.c-dex.co.jp/</a> (Japanese only)<br>
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Time code format<br>
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</p>
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<table>
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<tr>
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<td>Command</td>
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<td>Reply</td>
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</tr>
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<tr>
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<td><tt><ENQ>1J<ETX></tt></td>
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<td><tt><STX>JYYMMDD HHMMSSS<ETX></tt></td>
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</tr>
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</table>
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</li>
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</ul>
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<p>JJY is the radio station which transmites the JST (Japan
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Standard Time) in long wave radio. The station JJY is operated by
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the Communication Research Laboratory. An operating announcement
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and some information are avaiable from <a href=
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"http://www.crl.go.jp/">http://www.crl.go.jp/</a> (English and
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Japanese)<a href="http://jjy.crl.go.jp/">http://jjy.crl.go.jp/</a>
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(Written in Japanese only</p>
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<p>The user is expected to provide a symbolic link to an available
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serial port device. This is typically performed by a command such
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as:</p>
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<p><tt>ln -s /dev/ttyS0 /dev/jjy0</tt></p>
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<p>Windows NT does not support symbolic links to device files.
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COM<i>X</i>: is the unit used by the driver, based on the refclock
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unit number, where unit 1 corresponds to COM1: and unit 3
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corresponds to COM3:</p>
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<h4>Monitor Data</h4>
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<p>The driver writes each timecode as received to the <tt>
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clockstats</tt> file.</p>
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<h4>Fudge Factors</h4>
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<dl>
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<dt><tt>time1 <i>time</i></tt></dt>
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<dd>Specifies the time offset calibration factor, in seconds and
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fraction, with default 0.0.</dd>
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<dt><tt>time2 <i>time</i></tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>stratum <i>number</i></tt></dt>
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<dd>Specifies the driver stratum, in decimal from 0 to 15, with
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default 0.</dd>
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<dt><tt>refid <i>string</i></tt></dt>
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<dd>Specifies the driver reference identifier, an ASCII string from
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one to four characters, with default <tt>WWVB</tt>.</dd>
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<dt><tt>flag1 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>flag2 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>flag3 0 | 1</tt></dt>
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<dd>Not used by this driver.</dd>
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<dt><tt>flag4 0 | 1</tt></dt>
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<dd>Enable verbose <tt>clockstats</tt> recording if set.</dd>
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</dl>
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<hr>
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<a href="index.htm"><img align="left" src="pic/home.gif" alt=
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"gif"></a>
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<address><a href="mailto:mills@udel.edu">David L. Mills
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<mills@udel.edu></a></address>
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</body>
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</html>
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