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15 <!-- #BeginDate format:En2m -->21-Oct-2010 23:44<!-- #EndDate -->
19 <p>Address: 127.127.27.<i>u</i><br>
20 Reference ID: <tt>MSFa</tt> / <tt>MSF</tt> / <tt>DCF</tt> / <tt>WWVB</tt><br>
21 Driver ID: <tt>MSF_ARCRON</tt><br>
22 Serial Port: <tt>/dev/arc<i>u</i></tt>; 300 baud, 8-bits, 2-stop, no parity<br>
26 …1 and v1.2 include patches to work with the new ntp-4 code, clock support for DCF and WWVB configu…
28 …1 (1997/06/23) of the source and had been tested (amongst others) against ntpd3-5.90 on Solaris-1 …
30 …omething approaching the 2.5 years expected in the usual stand-alone mode, but no battery-life mea…
31 …-Davis</a>. Thanks also to <a href="mailto:lyndond@sentinet.co.uk">Lyndon David</a> for some of th…
34 …-time). In the default or original MSF mode, the time is in `local' format, including the daylight…
35 …-5 or -4, -4 being used in this code, which builds in a reported dispersion of over 63ms (ie says …
37 …n the clock's reported time, you might fudge the clock to stratum 1 to allow a stratum-2 secondary…
38 …ality reported by the clock. If the signal quality is too low (0--2 out of a range of 0--5), we ch…
41 …p>When alternate modes 1-3 are selected, the driver can be configured to ignore the resync request…
44 <li>Your RS232 interface must drive both +ve and -ve
45 <li>You must (in theory) wait for an echo and a further 10ms between characters
48 …10ms. Following the echo of the command string, there may be a response (ie in the case of the <tt…
58 <dd>always 1
60 <dd>always 1
65 <dt>bit 1
66 <dd>always 1
68 … <dd>= 0 if no reception attempt at the moment, = 1 if reception attempt (ie resync) in progress
76 <dd>always 1
78 <dd>always 1
81 <dt>bit 2--0
82 …<dd>reception signal quality in the range 0--5 (very poor to very good); if in the range 0--2 no s…
87 …<dd>Request timestamp. Start bit of first byte of response is on-time, so may be delayed up to 1 s…
95 <li>day of week 1 (Monday) to 7 (Sunday)
109 <dd>always 1
111 <dd>always 1
113 <dd>(MSF) always 0<br>
114 (WWVB) Leap year indicator bit<br>
115 0 = non-leap year<br>
116 1 = leap year
118 <dd>= (MSF) 1 if UTC is in effect (reverse of bit 1)<br>
120 <dt>bit 1
121 <dd>= (MSF)1 if BST is in effect (reverse of bit 2)<br>
122 …= (WWVB) 0 if ST is in effect, 1 if DST is in effect, 1 if transition from ST with bit 0 is set to…
124 <dd>= (MSF)1 if BST/UTC change pending<br>
125 …= (WWVB) 0 if ST is in effect, 1 if DST is in effect, 0 if transition from DST with bit 1 is set t…
134 <dd>always 1
136 <dd>always 1
138 <dd>= 1 if low battery is detected
140 …<dd>= 1 if last resync failed (though officially undefined for the MSF clock, officially defined f…
141 <dt>bit 1
142 <dd>= 1 if at least one reception attempt was successful<br>
143 (MSF) since 0230<br>
144 (DCF) since 0300<br>
145 (WWVB) resets if not successful between 0300-0400
147 …<dd>= 1 if the clock has valid time---reset to zero when clock is reset (eg at power-up), and set …
150 … three bits of the status byte are <tt>011</tt> or <tt>flag2</tt> is set to 1 to ignore resync req…
155 #------------------------------------------------------------------------------
163 fudge 127.127.27.0 stratum 1 time1 0.016 flag3 1
166 fudge 127.127.27.0 stratum 1 time1 0.030 flag1 1 flag3 1
168 peer 11.22.33.9 # tick(1--2).
174 #------------------------------------------------------------------------------
196 … negative) offset implied by any such character, ie with the smallest kernel-induced display, and …
198 …-second insertion or deletion would happen if it is going to. This should help compensate for the …
200 …<dd>Currently set to <tt>-4</tt>, but you may wish to set it to <tt>-5</tt> if you are more conser…
203 …n to the <tt>clockstats</tt> file with a signal quality value appended (`0'--`5' as reported by th…
206 <pre>May 10 10:15:24 oolong ntpd[615]: ARCRON: unit 0: sending resync command
207 May 10 10:17:32 oolong ntpd[615]: ARCRON: sync finished, signal quality 5: OK, will use clock
208 May 10 11:13:01 oolong ntpd[615]: ARCRON: unit 0: sending resync command
209 May 10 11:14:06 oolong ntpd[615]: ARCRON: sync finished, signal quality -1: UNKNOWN, will use clock…
210 May 10 11:41:49 oolong ntpd[615]: ARCRON: unit 0: sending resync command
211 May 10 11:43:57 oolong ntpd[615]: ARCRON: sync finished, signal quality 5: OK, will use clock
212 May 10 12:39:26 oolong ntpd[615]: ARCRON: unit 0: sending resync command
213 May 10 12:41:34 oolong ntpd[615]: ARCRON: sync finished, signal quality 3: OK, will use clock</pre>
217 <dt><tt>mode 0 | 1 | 2 | 3</tt>
220 <dd>0 - Default, Original MSF
221 <dd>1 - Updated MSF
222 <dd>2 - New DCF77
223 <dd>3 - New WWVB
225 …on factor, in seconds and fraction, with default 0.0. On a Sun SparcStation 1 running SunOS 4.1.3_…
229 …ault 2. It is suggested that the clock be not be fudged higher than stratum 1 so that it is used a…
231 …rom one to four characters, with default <tt>MSFa</tt>. When used in modes 1-3, the driver will re…
232 <dt><tt>flag1 0 | 1</tt>
233 …<dd>(Modes 1-3) If set to 0 (the default), the clock is set to UTC time. If set to 1, the clock is…
234 <dt><tt>flag2 0 | 1</tt>
235 …<dd>(Modes 1-3) If set to 0 (the default), the clock will be forced to resync approximately every …
236 <dt><tt>flag3 0 | 1</tt>
237 …<dd>If set to 1, better precision is reported (and thus lower dispersion) while clock's received s…
238 <dt><tt>flag4 0 | 1</tt>
242 <p><a href="../refclock.html">Reference Clock Drivers</a><br>