Guralp Systems CMG-DM24 - Manual (Page 74)

CMG-DM24
%AMPLITUDE
Syntax: value %AMPLITUDE
Sets the relative amplitude of the signal, as a percentage. For
SQUAREWAVE and RANDOMCAL calibrations, the default of 100% is
normally suitable. If you have a high-gain sensor, you may have to use
a lower value. For SINEWAVE calibrations, you may have to adjust the
%AMPLITUDE setting to suit the frequency of the calibration signal.
You can insert %AMPLITUDE commands into calibration commands as
described above, e.g.:
Z 3 MINUTE 50 %AMPLITUDE RANDOMCAL
5.8 Actions
LOCK
Syntax: LOCK or LOCK MONITOR
Locks the sensor mass(es) of the instrument connected to SENSOR A.
If you issue LOCK, the command returns immediately, allowing you to
close the terminal connection and follow the progress of the lock from
the data streams.
If you issue LOCK MONITOR, the system displays the mass position for
each component, measuring one position each second (i.e. one reading
every 4 seconds for each component of a 4-component instrument).
The process returns when locking is complete.
The mass positions are measured to 16-bit accuracy, with full
deflection corresponding to values around ±32000 counts.
UNLOCK
Syntax: UNLOCK
Unlocks the sensor mass(es) of the instrument connected to
SENSOR A.
UNLOCK returns immediately, whilst UNLOCK MONITOR monitors the
progress of the unlock by displaying mass positions, as for LOCK
MONITOR (above).
74 Issue N