The Xadow GPSv2module applies “AlwaysLocate” function and works at its “Standby Mode”, it also has a “Backup Mode” to prolong the battery.
You can check the Xadow GPSv2 source code on our github.
And also download the L70 GPS Specification and check on chapter 3.13 Packet Type:255 PMTK_SET_PERIODIC_MODE