CAM-M8 - Data Sheet

UBX-15031574 - R04

Page 15 of 31

Production Information

1.18.2 Power Mode Setup

u-blox M8 modules can be configured to run in either continuous 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. For more information, see section 1.18.2.2.

The u-blox M8 modules’ 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 1 Hz cyclic tracking mode for aggressive power reduction

•

Choice of 2 or 4 Hz 9 cyclic tracking modes for typical wearable applications

•

ON/OFF interval mode

1.18.2.1 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

1.18.2.2 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, that 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.

Description Including Protocol Specification [2]

.