Guralp Systems Scream - Manual (Page 90)

Scream! 4.5
If you change the Sensor Type, you may have to Apply the change,
close the Control window, and open a new one to access the Mass
Control options.
Output Unified Status packets : Unified status packets are a binary
formatted status information packet that is intended for use with
CMG-EAM and CMG-NAM modules. If your digitiser is connected
directly to an EAM or NAM, you should enable this option. Unified
status packets report GPS and channel status every second, so may
consume a lot of bandwidth if a digitiser is connected via some type of
link other than a direct connection to an EAM.
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. The digitiser will power
up the GPS receiver and keep it powered up until a satisfactory timing
fix has been achieved. It will then power it down for the specified
duration before powering it up again.
8.2 Triggering
The Triggering pane is very similar to the corresponding pane of the
Configuration set-up window, although not all options are available
because some changes require rebooting the digitiser. See Section 7.3
on page 80 for more details.
90 Issue K