Guralp Systems CMG-3ESPCD - Manual (Page 54)

CMG-3ESPCD Digital Broadband Seismometer Using Scream!
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.
5.2.2 Triggering
The Triggering pane is very similar to the corresponding pane of the
Configuration set-up window although not all options are available, since
some require rebooting the digitiser. See “Triggering” in section 5.2.2 on page
54 for more details.
5.2.3 Calibration
You can check that your instrumentation is correctly calibrated by injecting
known signals into the sensor's feedback loop. The Calibration pane allows
you to do this once the sensors are installed. See section 4 on page 28 for
details.
5.2.4 Mass Control
The controls on this tab are used to centre, unlock, and lock the sensor
masses.
Note: Whether or not this tab is visible depends on the “Sensor
type” setting on the “System” tab. See section 5.2.1 on page 53.
See section 7.1.2 on page 77 for more information.
MAN-C3E-0002 54 Issue B - November 2013