Serial Port: <tt>/dev/wwvb<i>u</i></tt>; 9600 bps, 8-bits, no parity<br>
<br>
Features: <tt>(none)</tt>
<h4>Description</h4>
<p>This driver supports the Ultralink Model 325 (replacement for Model 320) RS-232 powered WWVB receiver. PDF specs available on <ahref="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.<br>
Leap second and quality are supported.</p>
<p>Most of this code is originally from refclock_wwvb.c with thanks. Any mistakes are mine. Any improvements are welcome.</p>
R = Signal readability indicator, ranging from R1 to R5
Q R1 is unreadable, R5 is best reception
_ = Space
1 = prev. received data bit, values: 0, 1 ,M or ? unknown
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)
L = HEX A5 if receiver is locked to WWVB, Space if not
YYYY = Year from 2000 to 2099
+ = '+' if current year is a leap year, else ' '
DDD = current day in the year from 1 to 365/366
UTC = timezone (always UTC)
S = Daylight savings indicator, (S)TD, (D)ST, (O) transition
into DST, (I) transition out of DST
_ = Space
HH = UTC hour 0 to 23
: = Time delimiter, ':' if synced, Space if not
MM = Minutes of current hour from 0 to 59
: = Time delimiter, ':' if synced, Space if not
SS = Seconds of current minute from 0 to 59
mm = 10's milliseconds of the current second from 00 to 99
L = Leap second pending at end of month, (I)nsert, (D)elete
or Space
+5 = UT1 correction, +/- .1 sec increments
</pre>
<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>
