Guralp Systems CMG-DM24 - Manual (Page 92)

CMG-DM24
Mass positions
2006 1 18 14:56:15 Mass positions -486 -300 -424
The final line provides the instantaneous mass positions reported by
the sensor at the time given.
Status blocks in continuous mode
In continuous mode, each status block contains a number of single-
line messages:
2006 1 18 14:38:00 o/s= 90 drift= 0 pwm= 8187 Auto 3D
2006 1 18 14:39:00 o/s= 90 drift= 0 pwm= 8187 Auto 3D
2006 1 18 14:40:00 o/s= 90 drift= 0 pwm= 8187 Auto 3D
2006 1 18 14:41:00 o/s= 90 drift= 0 pwm= 8187 Auto 3D
2006 1 18 14:42:00 o/s= 90 drift= 0 pwm= 8187 Auto 3D
2006 1 18 14:43:00 o/s= 78 drift= -12 pwm= 8188 Auto 2D
2006 1 18 14:44:00 o/s= 89 drift= 11 pwm= 8188 Auto 3D
2006 1 18 14:45:00 o/s= 94 drift= 5 pwm= 8188 Auto 3D
2006 1 18 14:45:00 External supply : 13.0V Temperature 24.62'C
2006 1 18 14:46:00 o/s= 148 drift= 54 pwm= 8188 Auto 3D
2006 1 18 14:47:00 o/s= 174 drift= 26 pwm= 8188 Auto 3D
2006 1 18 14:48:00 o/s= 211 drift= 37 pwm= 8188 Auto 3D
2006 1 18 14:48:36 SOFTWARE Trigger : Trigger# 22
2006 1 18 14:49:00 o/s= 263 drift= 52 pwm= 8187 Auto 3D
2006 1 18 14:49:10 End of Trigger
The messages appear in the order they are generated by the different
software modules inside the digitizer.
GPS status messages
The status of the attached GPS receiver is reported every minute:
2006 1 18 14:47:00 o/s= 174 drift= 26 pwm= 8188 Auto 3-D
In this line:
•
o/s gives the current offset of the internal clock from GPS time,
in arbitrary internal units;
•
drift is the difference between the current o/s and the last,
which gives an indication of the level of drift;
•
pwm, or Pulse Width Modulation, is the feedback control
parameter;
•
Auto 3-D denotes that enough GPS satellites are currently
visible to obtain a full 3D fix. If, instead, No Fix is displayed,
the GPS received has not (yet) been able to obtain a satisfactory
92 Issue N