5. Current Measurement Process
PNT-SG3FS Evaluation Kit User Guide
14
5.
Current Measurement Process
The current measurement pins identified in Table 2 of the previous section are highlighted in
Figure 10 below.
Figure 9. Current Measurement Connector Pins
To measure the current consumption of the PNT-SG3FS in different operating modes:
1. Connect a true-RMS voltmeter to:
♦
VCC (pin #9) and PM_VCC (pin #10)
♦
VBAT (pin #7) and PM_VBAT (pin #8)
2. Wait 15 minutes to download all GNSS orbital data.
3. Read the voltage (and average if necessary); the current value is determined with the
following conversions:
♦
VCC: 1 mV equals 1 mA
♦
VBAT: 100 mV equals 1 mA
Note
: Perform the test with good signals and a clear sky view to ensure that the receiver can
acquire the satellite signals.
Pin #7: VBAT
Pin #9: VCC
Pin #8: PM_VBAT
Pin #10: PM_VCC
