Guralp Systems CMG-DM24S12AMS User Manual

Page 33

CMG-DM24S12AMS Operator's guide

Sensor Type: If the sensor attached to the digitiser is a Güralp velocity
sensor, useful seismometer functions (such as sensor locking, centring,

and calibration) may be controlled through the digitiser. The type of

sensor programmed with this option determines which functions will be
available through the SCREAM digitiser configuration set-up interface
or through interactive commands. The in-built digitisers are already

programmed to the proper sensor type for Güralp CMG-5U uniaxial

sensors.

Enable GPS power cycling: If you are using a GPS unit to receive time
signals, but do not experience significant drift in the system's clock (for

example, in a stable-temperature environment), you can save power by

selecting Enable GPS power cycling. With this option in use, the GPS
time is only checked at intervals of a specified number of hours. You can

enable or disable this feature at any time, but if you want to change the
interval between time fixes, you will need to use the Configuration setup

window (and reboot the digitiser.)

Triggering

The Triggering pane is very similar to the corresponding pane of the
Configuration setup window, although not all options are available since

some require rebooting the digitiser. See

“Triggering” in Section 3.1

for

more details.

March 2004