132 lines
3.6 KiB
HTML
132 lines
3.6 KiB
HTML
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<HTML>
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<HEAD>
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
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<META NAME="GENERATOR" CONTENT="Mozilla/4.01 [en] (Win95; I) [Netscape]">
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<TITLE>PSTI/Traconex 1020 WWV/WWVH Receiver
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</TITLE>
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</HEAD>
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<BODY>
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<H3>
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PSTI/Traconex 1020 WWV/WWVH Receiver</H3>
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<HR>
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<H4>
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Synopsis</H4>
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Address: 127.127.3.<I>u</I>
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<BR>Reference ID: <TT>WWV</TT>
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<BR>Driver ID: <TT>WWV_PST</TT>
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<BR>Serial Port: <TT>/dev/wwv<I>u</I></TT>; 9600 baud, 8-bits, no parity
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<BR>Features: <TT>tty_clk</TT>
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<H4>
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Description</H4>
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This driver supports the PSTI 1010 and Traconex 1020 WWV/WWVH Receivers.
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No specific claim of accuracy is made for these receiver, but actual experience
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suggests that 10 ms would be a conservative assumption.
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<P>The DIP-switches should be set for 9600 bps line speed, 24-hour day-of-year
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format and UTC time zone. Automatic correction for DST should be disabled.
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It is very important that the year be set correctly in the DIP-switches;
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otherwise, the day of year will be incorrect after 28 April of a normal
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or leap year. The propagation delay DIP-switches should be set according
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to the distance from the transmitter for both WWV and WWVH, as described
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in the instructions. While the delay can be set only to within 11 ms, the
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fudge time1 parameter can be used for vernier corrections.
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<P>Using the poll sequence <TT>QTQDQM</TT>, the response timecode is in
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three sections totalling 50 ASCII printing characters, as concatenated
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by the driver, in the following format:
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<PRE>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)</PRE>
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The alarm condition is indicated by other than <TT>8</TT> at <TT>a</TT>,
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which occurs during initial synchronization and when received signal is
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lost for an extended period; unlock condition is indicated by other than
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<TT>0000</TT> in the <TT>tttt</TT> subfield.
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<H4>
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Monitor Data</H4>
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When enabled by the <TT>flag4</TT> fudge flag, every received timecode
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is written as-is to the <TT>clockstats</TT> file.
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<H4>
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Fudge Factors</H4>
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<DL>
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<DT>
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<TT>time1 <I>time</I></TT></DT>
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<DD>
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Specifies the time offset calibration factor, in seconds and fraction,
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with default 0.0.</DD>
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<DT>
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<TT>time2 <I>time</I></TT></DT>
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<DD>
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Not used by this driver.</DD>
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<DT>
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<TT>stratum <I>number</I></TT></DT>
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<DD>
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Specifies the driver stratum, in decimal from 0 to 15, with default 0.</DD>
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<DT>
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<TT>refid <I>string</I></TT></DT>
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<DD>
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Specifies the driver reference identifier, an ASCII string from one to
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four characters, with default <TT>WWV</TT>.</DD>
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<DT>
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<TT>flag1 0 | 1</TT></DT>
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<DD>
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Not used by this driver.</DD>
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<DT>
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<TT>flag2 0 | 1</TT></DT>
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<DD>
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Not used by this driver.</DD>
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<DT>
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<TT>flag3 0 | 1</TT></DT>
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<DD>
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Not used by this driver.</DD>
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<DT>
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<TT>flag4 0 | 1</TT></DT>
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<DD>
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Not used by this driver.</DD>
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</DL>
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Additional Information
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<P><A HREF="refclock.htm">Reference Clock Drivers</A>
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<HR>
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<ADDRESS>
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David L. Mills (mills@udel.edu)</ADDRESS>
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</BODY>
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</HTML>
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