Data Sheet

ZOE-M8 - Data Sheet
UBX-16008094 - R07 Production Information Functional description
Page 14 of 29
u-blox ZOE-M8 SiPs can be configured to run in either continuous mode or a choice of power save mode
configurations. A template of power mode settings can be used to easily select typical power mode setups to cover
the majority of users’ requirements.
For specific power saving applications the user has the option to fully configure via the power save mode
configuration. More information see the section 1.22.2.2.
The ZOE-M8 SiPs’ power mode setup offers a choice of continuous operation and preset power save mode
configurations.
• Continuous (default) mode for best GNSS performance vs. power consumption
• Continuous with no compromise in power consumption
• A 1Hz cyclic tracking mode for aggressive power reduction
• Choice of 2 or 4 Hz
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cyclic tracking modes for typical wearable applications
• ON/OFF interval mode
1.22.2.1 Continuous mode
Continuous mode uses the acquisition engine at full performance resulting in the shortest possible TTFF and the
highest sensitivity. It searches for all possible satellites until the Almanac is completely downloaded. The receiver
then switches to the tracking engine to lower power consumption.
Thus, a lower tracking current consumption level will be achieved when:
• A valid GNSS position is obtained
• The entire Almanac has been downloaded
• The Ephemeris for each satellite in view is valid
1.22.2.2 Power save mode
For specific power saving applications outside the typical preset power mode setups, users can configure a tailored
power save mode.
Power save mode provides two dedicated methods, ON/OFF and cyclic tracking, which reduce average current
consumption in different ways to match the needs of the specific application. These operations can be set by using
a specific UBX message.
For ON/OFF power save operation, an RTC signal is required.
Position accuracy in power save mode is degraded compared to continuous mode.
For more information about power management strategies, see the u-blox 8 / u-blox M8 Receiver Description
Including Protocol Specification [2].
1.23 Antenna
The ZOE-M8 SiPs are designed for use with passive
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and active
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antennas.
Parameter Specification
Antenna Type Passive and active antenna
Active Antenna Recommendations
Minimum gain
Maximum gain
Maximum noise figure
10 dB (including cable loss )
30 dB
2 dB
Table 6: Antenna recommendations and specifications for ZOE-M8 SiPs
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Single GNSS constellation configuration only
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For integration ZOE-M8 SiPs with Cellular products, see the ZOE-M8 Hardware Integration Manual [1].
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For information on using active antennas with ZOE-M8 SiPs, see the ZOE-M8 Hardware Integration Manual [1].