EVK-M8F-0-00 User Guide
UBX-14005459 - R04
Early Production Information
Measuring tracking current
Page 13 of 21
5
Measuring tracking current
To measure the tracking current with EVK-M8F, follow these steps:
1.
Connect a voltmeter capable of measuring average current across VCC and MODVCC of the front
connector. (see Figure 4)
2.
Wait 12 minutes to download all GNSS orbital data, or download all the Aiding Data via the AssistNow
Online service
3.
Read the voltage (and average if necessary) on the voltmeter and convert to current (1 mV equals 1 mA)
4.
Perform the test with good signals and clear sky view to ensure that the receiver can acquire the satellite
signals.
The overall current measurement is consistent with the consumption of a LEA-M8F module and
representative of designs using 3.3 V Flash and high-performance VCTCXO.
For more details see the circuit in Figure 6.
VCC_RF and VANT pins should be fitted with jumper (as shown in front panel of Figure 2) in order to
power an active antenna.
The jumper is delivered with the EVK-M8F kit as shown in Figure 2.
Figure 4: Example – tracking current measurement
Hirschmann
Part Nr.: 934160100
P1A (VCC)
P1B
P1B
P1A (VCC)
