Guralp Systems CMG-EDU - Manual (Page 35)

Operator's guide
Sets the system's real time clock. This time will be used from power-
up until it is corrected by an attached GPS. If you are not using GPS
but are synchronizing from some other time source, you will need to
re-issue this command regularly to ensure the CD24E1 does not drift.
You will need to RE-BOOT after issuing this command for it to take
effect.
5.3.4 TIME?
Syntax: TIME?
Displays the current time as held in the system's real time clock. If a
GPS is attached, this will be synchronized to it. The output is given in
the form
year month day hour minute second centisecond ok
5.3.5 .FIX
Syntax: .FIX
Displays the current GPS timing fix. The GPS must be attached and
powered up for this command to be valid; if it is not, you will see an
error message. You can power up the GPS manually with the
command XGPS.
The CD24E1 will reply in the form
.fix year month day hour:minute:second =>> Auto fix-mode SV#'s
satellites ( number-of-satellites ) ok
where fix-mode is the fix type (either 2-D or 3-D) and satellites
is a list of the satellites currently visible. The CD24E1 will carry out
clock trimming only if a 3-D fix is available, which requires at least 3
satellites to be visible.
5.3.6 .POSITION
Syntax: .POSITION
Displays the current reported GPS position, in the form
.position Lat latitude Long longitude ok
where latitude and longitude are displayed in degrees, minutes
and seconds.
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