SAM-M10Q-Integration manual
Some power save mode states clear the RAM memory. Store receiver configuration in BBR
to maintain the settings.
GPS, GLONASS, BeiDou B1I, Galileo and QZSS signals are supported in power save mode. BeiDou
B1C signal is not supported. The receiver is unable to download or process any SBAS data in power
save mode and it is therefore recommended to disable SBAS.
BeiDou B1C is not supported in power save mode.
2.6.2.1 Operation
PSM is based on a state machine with five different states: "Inactive for update", "Inactive for
search", "Acquisition", "Tracking", and "Power optimized tracking (POT)" state.
• "Inactive" states: Most parts of the receiver are switched off.
• "Acquisition" state: The receiver actively searches for and acquires signals. Maximum power
consumption.
• "Tracking" state: The receiver continuously tracks and downloads data. Less power
consumption than in the "Acquisition" state.
• "POT" state: The receiver repeatedly loops through a sequence of tracking (Track), calculating
the position fix (Fix), and entering an idle period (Idle). No new signals are acquired and no data
is downloaded. Much less power consumption than in the "Tracking" state.
The PSM state machine is described in Figure 10.
Figure 10: State machine
2.6.2.2 Acquisition timeout
The receiver has internal, external, and user-configurable mechanisms that determine the time
to be spent in acquisition state. This logic is put in place to ensure good performance and low
power consumption in different environments and scenarios. This collective logic is referred to as
acquisition timeout.
The configuration items related to acquisition timeout are described in section Configuration.
Internal mechanisms:
UBX-22020019 - R01
2 Receiver functionality Page 26 of 72
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