MIA-M10Q - Integration manual
2.7.2.6 Configuration
Power save mode (PSM) is enabled and disabled with CFG-PM-OPERATEMODE and configured with
items in the CFG-PM group listed in
.
When using power save mode on/off (PSMOO) operation, set the OPERATEMODE as the
last PSM configuration key to prevent the receiver entering the off state before all intended
PSM configuration keys are set.
Config key
Description
OPERATEMODE
Receiver mode of operation
POSUPDATEPERIOD
Time between two position fix attempts in on/off power save mode
ACQPERIOD
Time between two acquisition attempts if the receiver is unable to get a position fix
GRIDOFFSET
Time offset of update grid with respect to start of week
ONTIME
Time the receiver remains in the "Tracking" state and produces position fixes
MINACQTIME
Minimum time the receiver spends in the "Acquisition" state
MAXACQTIME
Maximum time in the "Acquisition" state
DONOTENTEROFF
Receiver does not enter the "Inactive for search" state if it cannot get a position fix but
keeps indefinitely attempting a position fix instead
WAITTIMEFIX
Wait for time fix before entering the "Tracking" state
UPDATEEPH
Enables periodic ephemeris update
EXTINTWAKE
Enables EXTINT pin control to force receiver on
EXTINTBACKUP
Enables EXTINT pin control to force receiver in backup
EXTINTINACTIVE
Enter a backup state if EXTINT pin is inactive longer time than specified by
EXTINTINACTIVITY
EXTINTINACTIVITY
Specifies the inactivity period
Table 21: Power save mode configuration options in the CFG-PM group
OPERATEMODE
The mode of operation to use mainly depends on the update period: For short
update periods (in the range of a few seconds), cyclic tracking should be configured. For long update
periods (in the range of minutes or longer), only use on/off operation. See section
and
for more information on the two modes of operation.
POSUPDATEPERIOD, ACQPERIOD
The update period POSUPDATEPERIOD specifies the time
between successive position fixes. If no position fix can be obtained within the acquisition timeout,
the receiver will retry after the time specified by the search period ACQPERIOD. Update and search
periods are fixed with respect to an absolute time grid based on reference time standard (i.e., GPS
time or UTC). They do not refer to the time of the last valid position fix or last position fix attempt.
Where multiple GNSS can operate simultaneously, UTC time is used as the reference time standard.
The update period setting is ignored if the receiver is set into cyclic tracking mode. It only has an
impact if the receiver is set to on/off mode. New settings are ignored if the update period or the
search period exceeds the maximum number of milliseconds in a week. In that case the previously
stored values remain effective.
GRIDOFFSET
Once the receiver has a valid time, the update grid is aligned to the start of the week of
the reference time standard (midnight between Saturday and Sunday). Before having a valid time,
the update grid is unaligned. A grid offset shifts the update grid with respect to the start of the week
of the reference time standard. The grid offset is not used in cyclic tracking operation.
ONTIME
This specifies how long the receiver stays in the "Tracking" state before switching to the
"POT" state in PSMCT or the "Inactive for update" state in PSMOO.
UBX-21028173 - R01
2 Receiver functionality
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C1-Public
