155 lines
7.2 KiB
Plaintext
155 lines
7.2 KiB
Plaintext
#
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# NTP configuration file (ntp.conf)
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# grundoon.udel.edu
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#
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# This machine can best be described as the kitchen sink. It has, in
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# addition to the baseboard tty ports ttya and ttyb, an 8-line
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# Serial/Parallel Interface (SPIF) with ports ttyz00 through ttyz07. The
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# configuration includes the following drivers, clock addresses and Unix
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# device names.
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#
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# Local Clock 127.127.1.0 /dev/audio
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# PST 1020 WWV/WWVH Receiver 127.127.3.1 /dev/pst1
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# Spectracom 8170 WWVB Receiver 127.127.4.1 /dev/wwvb1
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# IRIG Audio Decoder 127.127.6.0 /dev/audio
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# Scratchbuilt CHU Receiver 127.127.7.1 /dev/chu1
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# NIST ACTS modem 127.127.18.1 /dev/acts1
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# Heath GC-1000 WWV Receiver 127.127.19.1 /dev/pst1
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# PPS Clock 127.127.22.1 none
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#
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# This machine has the kernel modifications described in the README.kern
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# file, as well as the tty_clk, tty_chu and ppsclock streams modules.
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#
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# Spectracom 8170/Netclock-2 WWVB receiver. This receiver is equipped
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# with a 1-pps and IRIG outputs. The 1-pps signal is connected via the
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# ppsclock streams module and the carrier detect line of the CHU
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# receiver below (ttyb). The IRIG signal is connected via an attenuator
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# to the audio port (/dev/audio). The propagation delay computed from
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# geographical coordinates is 8.8 ms, while the receiver delay
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# calibrated at the factory is 17.3 ms, for a total delay of 26.1 ms.
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# This is confirmed within 0.1 ms at the 1-pps signal output using a
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# portable cesium clock. We add a fudge time1 of 3.5 ms so the driver
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# time agrees with the 1-pps signal to within 1 ms. The fudge flag4 is
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# set to cause the receiver to dump the quality table once each day to
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# the clockstats file.
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#
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#server 127.127.4.1 # /dev/wwvb1 -> /dev/ttyz03
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#fudge 127.127.4.1 time1 0.0035 flag4 1
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#
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# IRIG Audio Decoder. The IRGI signal of the Spectracom WWVB receiver is
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# connected to the audio codec via a resistor attenuator. We add a fudge
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# time1 of 3.5 ms so the driver agrees with the calibrated 1-pps signal
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# to within 0.1 ms. We also specify a reference ID of WWVB to indicate
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# the signal origin. Note the prefer keyword in the server line, which
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# favors this driver over all others that survive the clock selection
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# algorithm. See README.refclock for further insight on this feature.
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#
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server 127.127.6.0 prefer # /dev/audio
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fudge 127.127.6.0 time1 0.0005 refid WWVB
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#
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# PST/Traconex 1020 WWV/WWVH Receier. The internal DIPswitches are set
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# as near as possible to the delays to WWV (8.8 ms) and WWVH (28.1 ms),
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# as computed from geographical coordinates. We add a fudge time1 of 5.9
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# ms so the driver time agrees with the 1-pps signal to within 1 ms for
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# WWV. We also set the stratum to 1, so this receiver will not normally
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# be selected, unless the primary WWVB receiver comes unstuck.
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#
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server 127.127.3.1 # /dev/pst1 -> ttyz05
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fudge 127.127.3.1 time1 0.0059 stratum 1
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#
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# Scratchbuilt CHU Receiver. The audio signal from a computer controlled
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# CHU receiver is connected to a gadget box, which contains a 103A modem
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# chip and level converter operating at 300 bps. The propagation delay
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# computed from geographical coordinates is 3.0 ms, which is the value
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# of the fudge time1 parameter. We add a fudge time2 of 9.9 ms so that
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# the driver time agrees with the 1-pps signal to within a few ms,
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# ordinarily the best possible with this receiver. The fudge flag3 is
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# set because the 1-pps signal happens to be connected vit the carrier
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# detect line on this port (ttyb). We also set the stratum to 1, so this
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# receiver will not normally be selected, unless the primary WWVB
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# receiver comes unstuck.
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#
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server 127.127.7.1 # /dev/chu1 -> /dev/ttyb
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fudge 127.127.7.1 time1 0.0030 time2 0.0099 flag3 1 stratum 1
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#
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# NIST Automated Computer Time Service. This driver calls a special
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# telephone number in Boulder, CO, to fetch the time directly from the
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# NIST cesium farm. The details of the complicated calling program are
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# in the README.refclock file. The Practical Peripherals 9600SA modem
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# does not work correctly with the ACTS echo-delay scheme for
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# automatically calculating the propagation delay, so the fudge flag2 is
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# set to disable the feature. Instead, we add a fudge time1 of 65.0 ms
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# so that the driver time agrees with th e1-pps signal to within 1 ms.
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# The phone command specifies three alternate telephone numbers,
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# including AT modem command prefix, which will be tried one after the
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# other at each measurement attempt. In this case, a cron job is used to
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# set fudge flag1, causing a measurement attempt, every six hours.
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#
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server 127.127.18.1 # /dev/acts1 -> /dev/ttyz00
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fudge 127.127.18.1 time1 0.0650 flag2 1
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phone atdt13034944774 atdt13034944785 atdt13034944774
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#
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# Heath GC-1000 Most Accurate Clock. This is a WWV receiver with a
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# claimed accuracy better than 100 ms under "hi spec" conditions, but
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# such conditions are not frequent. The propagation delay DIPswitchs are
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# set to 9 ms, as close as possible to the 8.8 ms computed from
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# geographical coordinates. We add a fudge time2 of 40.0 ms so that the
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# driver time agrees with the 1-pps signal to within 50 ms, ordinarily
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# the best possible with this receiver. We also set the stratum to 1, so
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# this receiver will not normally be selected, unless the primary WWVB
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# receiver comes unstuck.
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#
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server 127.127.19.1 # /dev/heath1 -> ttyz07
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fudge 127.127.19.1 time1 0.040 stratum 1
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#
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# Undisciplined Local Clock. This is a fake driver intended for backup
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# and when no outside source of synchronized time is available. The
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# default stratum is usually 3, but in this case we elect to use stratum
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# 0. Since the server line does not have the prefer keyword, this driver
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# is never used for synchronization, unless no other other
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# synchronization source is available. In case the local host is
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# controlled by some external source, such as an external oscillator or
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# another protocol, the prefer keyword would cause the local host to
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# disregard all other synchronization sources, unless the kernel
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# modifications are in use and declare an unsynchronized condition.
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#
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server 127.127.1.0 # local clock
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fudge 127.127.1.0 stratum 0
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#
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# PPS Clock. This driver is used to capture a 1-pps signal when the PPS
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# kernel modifications are not in use. It can be configured for the
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# tty_clk or ppsclock streams module or no module at all, assuming the
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# RS232 connector is properly wired. Normally, the 1-pps signal is
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# generated by a radio clock, in this cast the Spectracom clock
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# 127.127.4.1 also configured for this host. When used this way, the
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# associated radio clock normally has the prefer keyword in the serve
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# command line. The PPS driver then will be selected only if the prefer
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# peer is operating within nominal error bounds. See the README.refclock
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# file for further details.
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#
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#server 127.127.22.1 # pps clock
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#
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# Miscellaneous stuff. We enable authentication in order to prevent
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#
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driftfile /etc/ntp.drift # path for drift file
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statsdir /grundoon/ntpstats/ # directory for statistics files
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filegen peerstats file peerstats type day enable
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filegen loopstats file loopstats type day enable
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filegen clockstats file clockstats type day enable
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#
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# Authentication stuff
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#
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keys /usr/local/etc/ntp.keys # path for keys file
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trustedkey 1 2 3 4 5 6 14 15 # define trusted keys
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requestkey 15 # key (7) for accessing server variables
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controlkey 15 # key (6) for accessing server variables
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