112 lines
3.6 KiB
HTML
112 lines
3.6 KiB
HTML
<!-- $NetBSD: driver3.html,v 1.1 1998/12/30 20:20:34 mcr Exp $ -->
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML Strict//EN">
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<html><head><title>
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PSTI/Traconex 1020 WWV/WWVH Receiver
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</title></head><body><h3>
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PSTI/Traconex 1020 WWV/WWVH Receiver
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</h3><hr>
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<p><h4>Synopsis</h4>
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<p>Address: 127.127.3.<var>u</var>
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<br>Reference ID: WWV
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<br>Driver ID: WWV-PST
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<br>Serial Port: <code>/dev/wwv<var>u</var></code>; 9600 baud, 8-bits,
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no parity
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<br>Features: <code>tty_clk</code>
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<p><h4>Description</h4>
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<p>This driver supports the PSTI 1010 and Traconex 1020 WWV/WWVH
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Receivers. No specific claim of accuracy is made for these receiver, but
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actual experience suggests that 10 ms would be a conservative
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assumption.
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<p>The DIP-switches should be set for 9600 bps line speed, 24-hour day-
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of-year format and UTC time zone. Automatic correction for DST should be
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disabled. It is very important that the year be set correctly in the
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DIP-switches; otherwise, the day of year will be incorrect after 28 April
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of a normal or leap year. The propagation delay DIP-switches should be
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set according to the distance from the transmitter for both WWV and
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WWVH, as described in the instructions. While the delay can be set only
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to within 11 ms, the fudge time1 parameter can be used for vernier
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corrections.
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<p>Using the poll sequence <code>QTQDQM</code>, the response timecode is
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in three sections totalling 50 ASCII printing characters, as
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concatenated by the driver, in the following format:
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<pre>
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ahh:mm:ss.fffs<cr> yy/dd/mm/ddd<cr>
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frdzycchhSSFTttttuuxx<cr>
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on-time = first <cr>
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hh:mm:ss.fff = hours, minutes, seconds, milliseconds
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a = AM/PM indicator (' ' for 24-hour mode)
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yy = year (from DIPswitches)
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dd/mm/ddd = day of month, month, day of year
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s = daylight-saving indicator (' ' for 24-hour mode)
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f = frequency enable (O = all frequencies enabled)
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r = baud rate (3 = 1200, 6 = 9600)
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d = features indicator (@ = month/day display enabled)
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z = time zone (0 = UTC)
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y = year (5 = 91)
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cc = WWV propagation delay (52 = 22 ms)
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hh = WWVH propagation delay (81 = 33 ms)
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SS = status (80 or 82 = operating correctly)
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F = current receive frequency (4 = 15 MHz)
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T = transmitter (C = WWV, H = WWVH)
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tttt = time since last update (0000 = minutes)
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uu = flush character (03 = ^c)
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xx = 94 (unknown)
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</pre>
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<p>The alarm condition is indicated by other than <code>8</code> at
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<code>a</code>, which occurs during initial synchronization and when
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received signal is lost for an extended period; unlock condition is
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indicated by other than <code>0000</code> in the <code>tttt</code>
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subfield.
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<p><h4>Monitor Data</h4>
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<p>When enabled by the <code>flag4</code> fudge flag, every received
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timecode is written as-is to the <code>clockstats</code> file.
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<p><h4>Fudge Factors</h4>
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<dl>
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<dt><code>time1 <i>time</i></code>
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<dd>Specifies the time offset calibration factor, in seconds and
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fraction, with default 0.0.
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<p><dt><code>time2 <i>time</i></code>
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<dd>Not used by this driver.
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<p><dt><code>stratum <i>number</i></code>
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<dd>Specifies the driver stratum, in decimal from 0 to 15, with default
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0.
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<p><dt><code>refid <i>string</i></code>
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<dd>Specifies the driver reference identifier, an ASCII string from one
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to four characters, with default <code>WWV</code>.
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<p><dt><code>flag1 0 | 1</code>
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<dd>Not used by this driver.
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<p><dt><code>flag2 0 | 1</code>
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<dd>Not used by this driver.
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<p><dt><code>flag3 0 | 1</code>
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<dd>Enable <code>ppsclock</code> line discipline/streams module if set.
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<p><dt><code>flag4 0 | 1</code>
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<dd>Enable <code>clockstats</code> recording if set.
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</dl>
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<p>Additional Information
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<p><a href="refclock.html"> Reference Clock Drivers</a>
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<hr><address>David L. Mills (mills@udel.edu)</address></body></html>
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