Guralp Systems Strong Motion - Manual (Page 6)

Strong Motion User Guide
serial2
Secondary Serial # { 0 } ? 6 characters : B808 B80800 ok_A808
GSL recommend that the system identifier is set to the digitiser
serial number, and that the stream identifier is set to the last
four digits of the sensor serial number.
2.3 Basic setup
These steps should be followed to ensure the digitiser behaves
as expected:
6 sensor-type
Sensor type set to CMG-5TD ok_A808
adaptive
Adaptive Storage : Circular ok_A808
erasefile
Are you SURE you want to delete ALL Flash Data? Y/N y
Erasing ALL 65.5MB
\ 49.1MB
64MB Flash Memory Buffer : 0 Blocks Written 0 Unread 65,536
Free
Oldest data [16] Blank
Read point [16] Blank
Latest data [16] Blank
File Replay [16] Blank ok_A808
normal compression Optimum Compression ok_A808
0 1 bandpass 10.0->90.0HzBandPass ok_A808
3 highpass
HighPass at 1000 sec ok_A808
“6 sensor-type” tells the digitiser that it is connected to a
CMG-5T. This does not alter data acquisition, or the behaviour
of the system, but merely disables some commands, such as
mass lock/unlock, which are not used with strong motion
instruments. The sensor-type command applies only to Sensor
A. Use the command “explain sensor-type” to get a list of
additional sensors.
“adaptive” turns on adaptive mode, in which the digitiser's
internal flash is used as a temporary buffer should data not be
acquired by a connected system. Other digitiser modes such as
FIFO or Direct are also compatible. Consult the DM24 manual to
determine which mode is the most appropriate for you. When
switching into this mode, the command “erasefile” is used to
clean the flash memory, which may contain stale data.
The “compression” and “bandpass” commands are required for
correct operation of lowlatency mode. The “highpass”
command introduces a highpass filter at 1000s, which has the
effect of removing DC offset from the sensor's output. This
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