CMG-DCM
digitizer in the FILING or DUAL filing mode, it will send heartbeat
messages to Scream! clients every so often. The DCM will not show
these messages in the Data Viewer.)
•
If the digitizer does not respond when you press
ENTER
, or produces
garbage, check that the DCM is using the same baud rate as the digitizer.
By default, digitizers use a baud rate of 9600, with 8 data bits, no parity
bit and 1 stop bit, and no flow control. To change the DCM's settings,
exit the terminal program, and either
•
use the Serial port configuration
→
port name Web page, or
•
issue configuration commands such as
serial.5.service gcf_in
serial.5.baudrate 9600
serial.5.handshaking none
To obtain the port number (here 5) corresponding to a named port, issue
the command
serialmap
.
•
If the digitizer is not responding at all, check the power supply to the
digitizer and the cable between it and the DCM.
The DCM is receiving streams, but they do not contain any data.
If the data you see is zero:
•
Increase the Y axis scale using the
icon in Scream!'s
Waveview window or the corresponding icon in the DCM's Data Viewer.
•
Check the mass position outputs to see if the masses are locked. A
properly unlocked and centred mass should show a mass position within
1000 counts of zero; a locked mass will give a value in the region of
32,000 or 32,000 counts. If your sensor has remote mass locking, you
−
can unlock the masses by navigating to Actions
Digitizer setup
→
and
clicking Unlock sensor.
Locking or unlocking the sensor mass typically takes several minutes to
complete.
•
Check the connection between the sensor and digitizer and try again.
If you cannot see the data in the stream, remove any constant offsets by clicking
on the Zero streams icon
in Scream!'s Waveview window or the DCM's
Data Viewer.
38
Issue A
