Measuring Tracking Current - u-blox EVK-M8L User Manual

6

Measuring tracking current

To measure the tracking current with EVK-M8L, follow these steps:
1. Connect a mean-reading voltmeter across P1A (VCC) and P1B of the front connector (see Figure
13).
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 16.
Figure 13: Example – tracking current measurement
UBX-20028627 - R01
C1-Public
P1A
(VCC)
P1B
Hirschmann
Part Nr.: 934160100
Measuring tracking current
EVK-M8L User Guide
P1B
P1A
(VCC)
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