Annotation of embedaddon/ntp/html/drivers/driver34.html, revision 1.1.1.1
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7: <title>Ultralink Clock</title>
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12: <h3>Ultralink Clock</h3>
13: <hr>
14: <h4>Synopsis</h4>
15: <p>Address: 127.127.34.<i>u</i><br>
16: Reference ID: <tt>WWVB</tt><br>
17: Driver ID: <tt>ULINK</tt><br>
18: Serial Port: <tt>/dev/wwvb<i>u</i></tt>; 9600 bps, 8-bits, no parity<br>
19: Features: <tt>(none)</tt></p>
20: <h4>Description</h4>
21: <p>This driver supports the Ultralink Model 325 (replacement for Model 320) RS-232 powered WWVB receiver. PDF specs available on <a href="http://www.ulio.com/">http://www.ulio.com/</a>. This driver also supports the Model 320, 330,331,332 decoders in both polled or continous time code mode.Leap second and quality are supported. Most of this code is originally from refclock_wwvb.c with thanks. Any mistakes are mine. Any improvements are welcome.</p>
22: <h4>Model 325 timecode format</h4>
23: <p><tt><cr><lf>RQ_1C00LYYYY+DDDUTCS_HH:MM:SSL+5</tt></p>
24: <p>R = Signal readability indicator, ranging from R1 to R5 Q R1 is unreadable, R5 is best reception<br>
25: _ = Space<br>
26: 1 = prev. received data bit, values: 0, 1 ,M or ? unknown
27: C = Signal reception from (C)olorado or (H)awaii 0 = Hours since last WWVB time and flag code update, values 0 00 to 99 (hopefully always 00)<br>
28: L = HEX A5 if receiver is locked to WWVB, Space if not<br>
29: YYYY = Year from 2000 to 2099<br>
30: + = '+' if current year is a leap year, else ' '<br>
31: DDD = current day in the year from 1 to 365/366<br>
32: UTC = timezone (always UTC)<br>
33: S = Daylight savings indicator, (S)TD, (D)ST, (O) transition into DST, (I) transition out of DST<br>
34: _ = Space<br>
35: HH = UTC hour 0 to 23<br>
36: : = Time delimiter, ':' if synced, Space if not<br>
37: MM = Minutes of current hour from 0 to 59<br>
38: : = Time delimiter, ':' if synced, Space if not<br>
39: SS = Seconds of current minute from 0 to 59<br>
40: mm = 10's milliseconds of the current second from 00 to 99<br>
41: L = Leap second pending at end of month, (I)nsert, (D)elete or Space<br>
42: +5 = UT1 correction, +/- .1 sec increments</p>
43: <p>Note that Model 325 reports a very similar output like Model 33X series. The driver for this clock is similar to Model 33X behavior. On a unmodified new ULM325 clock, the polling flag (flag1 =1) needs to be set.</p>
44: <h4>Model 320 timecode format</h4>
45: <p><tt><cr><lf>SQRYYYYDDD+HH:MM:SS.mmLT<cr></tt></p>
46: <p>S = 'S' -- sync'd in last hour, '0'-'9' - hours x 10 since last update, else '?'<br>
47: Q = Number of correlating time-frames, from 0 to 5<br>
48: R = 'R' -- reception in progress,'N' -- Noisy reception, ' ' -- standby mode<br>
49: YYYY = year from 1990 to 2089<br>
50: DDD = current day from 1 to 366 + = '+' if current year is a leap year, else ' '<br>
51: HH = UTC hour 0 to 23<br>
52: MM = Minutes of current hour from 0 to 59<br>
53: SS = Seconds of current minute from 0 to 59<br>
54: mm = 10's milliseconds of the current second from 00 to 99<br>
55: L = Leap second pending at end of month -- 'I' = insert, 'D'=delete<br>
56: T = DST <-> STD transition indicators</p>
57: <p>Note that this driver does not do anything with the T flag. The M320 also has a 'U' command which returns UT1 correction information. It is not used in this driver.</p>
58: <h4>Model 33x timecode format</h4>
59: <p><tt>S9+D 00 YYYY+DDDUTCS HH:MM:SSl+5</tt></p>
60: <p>S = sync indicator S insync N not in sync the sync flag is WWVB decoder sync nothing to do with time being correct </p>
61: <p>9+ = signal level 0 thru 9+ If over 9 indicated as 9<br>
62: D = data bit (fun to watch but useless ;-) space<br>
63: 00 = hours since last GOOD WWVB frame sync space<br>
64: YYYY = current year + = leap year indicator<br>
65: DDD = day of year<br>
66: UTC = timezone (always UTC)<br>
67: S = daylight savings indicator space<br>
68: HH = hours : = This is the REAL in sync indicator (: = insync)<br>
69: MM = minutes : = : = in sync ? = NOT in sync<br>
70: SS = seconds<br>
71: L = leap second flag<br>
72: +5 = UT1 correction (sign + digit ))</p>
73: <p>This driver ignores UT1 correction, DST indicator,Leap year and signal level.</p>
74: <h4>Fudge factors</h4>
75: <p>flag1 polling enable (1=poll 0=no poll)</p>
76: <hr>
77: <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script>
78: </body>
79: </html>
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