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• whether the GPS has obtained a fix (0 = has not received any data, 1 =
has not obtained a fix, 2 = has obtained a 2D fix, and 3 = has obtained a
3D fix);
• the mode the GPS is running in (A = automatic, and M = manual);
• whether or not the system clock is being controlled by the GPS (255 =
on);
• whether the GPS is currently powered up (255 = on);
• the current measured offset between GPS and the internal clock, in units
of 500 ns;
• the current value of the “busy” counter, which counts down towards zero
whilst certain digitizer processes (such as calibration) are active;
• whether the sensor is currentlty being locked, unlocked, or centred;
• which, if any, of the channels are currently being calibrated (the channel
appears with a + if this is the case).
Tamper lines
The command tamper provides information about the current state of the
DCM tamper lines. Issued with no arguments, it will output the status of all
tamper lines once every 10 seconds. Including the -w option causes it to exit
after printing the status once only:
[root@dcm-87AD9C933DE1 ~]# tamper -w
Input State Last Closed (Low) Last Open (High)
0 open (never) Mon Jan 5 21:50:37 1970
1 open (never) Mon Jan 5 21:50:37 1970
2 open (never) Mon Jan 5 21:50:37 1970
3 open (never) Mon Jan 5 21:50:37 1970
4 open (never) Mon Jan 5 21:50:37 1970
5 open (never) Mon Jan 5 21:50:37 1970
6 open (never) Mon Jan 5 21:50:37 1970
7 open (never) Mon Jan 5 21:50:37 1970
8 closed (never) (never)
9 closed (never) (never)
10 closed (never) (never)
11 closed (never) (never)
12 closed (never) (never)
13 closed (never) (never)
14 closed (never) (never)
15 closed (never) (never)
The output of the tamper command is included on the Summary page under
Actions on the DCM Web site.
90 Issue A