EVK-M8BZOE User Guide
UBX-17053592 - R03
Early Production Information
Testing Super-E mode
Page 18 of 33
5.3
Other useful messages
Super-E mode has three different states: acquisition, tracking, and power-optimized tracking. The power-
optimized tracking state is the low-power state of the Super-E mode. Acquisition and tracking states are used
during initial acquisition phase or in case fix is lost or satellite data for new satellites needs to be decoded. In most
cases, after initial acquisition phase the receiver spends all or most of the time in power-optimized tracking state.
Information on the Super-E state is given in the UBX-NAV-PVT message shown in Figure 6.
The default constellations used by the receiver are GPS, GLONASS and QZSS. The constellations used can be
selected with the UBX-CFG-GNSS message shown in Figure 7. Depending on region, it may be beneficial to
configure the receiver to use GPS, BeiDou and QZSS. Note however that AssistNow
TM
Offline service currently
supports GPS and GLONASS but not BeiDou. For absolute lowest power consumption, the receiver can be
configured to receive only GPS and QZSS satellites. This may affect the availability of satellites resulting in reduced
performance and is not recommended unless power saving is critical.
Figure 6: Navigation information is found in UBX-NAV-PVT message. In addition to time, position and velocity information, the
message contains a field indicating receiver state. The PSM state “Power optimized tracking” is the low-power state of Super-E
mode.
