Rainbow Electronics GE863-GPS low power - Manual (Page 112)

GE863-GPS Software User Guide
1vv0300724 Rev. 3 - 05/07/07
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5.6.7 Setting The GPS Module In Power Saving Mode
The command that allows to set the GPS module in Power saving mode is AT$GPSPS
Its syntax is:
AT$GPSPS= [,]
Parameters:
- the GPS receiver can operate in three modes
•
0 - full power mode, power saving disabled (default); it is the standard operating mode; power
is supplied to the receiver continuously and the GPS receiver continues to operate without an
interrupt.
•
1 - trickle power mode; the power to the SiRF chipset is cycled periodically, so that it operates
only a fraction of the time; power is applied only when a position fix is scheduled.
•
2 - push-to-fix mode; the GPS receiver is generally off, but turns on frequently enough to
collect ephemeris data to maintain the GPS1 real-time clock calibration so that, upon user
request, a position fix can be provided quickly after power-up.
- push-to-fix period, numeric value in secs; when mode is push-to-fix, the receiver
turns on periodically according to this parameter; default value is 1800 sec.
AT$GPSPS? is a read command that returns the current power saving mode and push-to-fix period,
in the format:
$GPSPS: ,
AT$GPSPS=? is a Test command returns the available range for and
NOTE: The command could be executed in controlled mode only.
NOTE: When the Push to fix mode is activated the GPS part will be switched off immediately;
It is necessary only for the first fix to provide the AT$GPSWK command; the receiver will
perform the FIX and then it will start the OFF cycle as set with the command.