EVK-7 / EVK-8 / EVK-M8 User Guide
UBX-14002502 - R09
Early Production Information
Measuring tracking current
Page 14 of 28
5
Measuring tracking current
To measure the tracking current with EVK-7 / EVK-8 / EVK-M8, follow these steps:
1.
Connect a true RMS voltmeter across P1A (VCC) and P1B of the front connector. (see Figure 5)
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 also includes the internal SQI flash. For ROM based products the current
will be lower.
For more details see the circuit in Figure 9.
Figure 5: Example – tracking current measurement
Hirschmann
Part Nr.: 934160100
P1A (VCC)
P1B
P1B
P1A (VCC)
