EVK-M8GZOE User Guide
UBX-16030132 - R04
Measuring current consumption (ZOE-M8G only)
Page 17 of 30
Early Production Information
ZOE-M8G VCC current
To measure the acquisition and tracking power consumption with the EVK-M8GZOE, follow the
below steps, a picture of the setup can be seen at Figure 5:
1.
Connect a voltmeter to J7 pin 1 and pin 2 to see the voltage over the 1
Ω
current measurement
shunt resistor in the
VCC
supply.
2.
Do a cold reset for the GNSS engine e.g. with u-center software.
3.
Read the voltage (and average for a while if necessary) on the voltmeter and convert to current.
1 mV equals 1 mA.
o
Average current consumption from power on to first fix will give you the Acquisition current
consumption as mentioned in ZOE-M8 Data Sheet [1].
o
After a while when visible SV’s are tracked and all data from the SV’s are downloaded, the
Tracking current as mentioned in
ZOE-M8 Data Sheet [1] can be measured.
Figure 5: Setup to measure the VCC current consumption of ZOE-M8G on EVK-M8GZOE
See Figure 5 as an example where 0.0407V in average are measured by multimeter over 1
Ω
VCC
shunt resistor. This corresponds (1 mV equals 1 mA) to 40.7 mA average current.
