D Current Consumption Measurement - u-blox SARA-N3 Series User Manual

D Current consumption measurement

Current consumption of SARA-N3 series modules can be measured on the EVK-N3 evaluation kits by
removing the jumper socket from the Cellular VCC supply jumper J155 available on the ADP-N3
board, as shown in Figure
Figure 5: Jumper socket to be removed for SARA-N3 modules current consumption measurement
A suitable external digital multi-meter (as for example the Keysight/Agilent 34465A, 34410A or
34411A) can be used for current consumption measurements; in this case, the 3.8 V supply circuit on
the EVB will supply the SARA-N3 module mounted on the adapter board, with the digital multi-meter
placed in series as described in
12 V
Main power switch
Step - Down
(J400)
(SW400)
EVB-WL3
Figure 6: Block diagram of current consumption setup for SARA-N3 series modules using a digital multi-meter
Alternatively, a suitable external DC power supply with dynamic current measurement capabilities (as
for example, the portable and cheap Qoitech Otii Arc, or the more accurate Keysight N6705B, or the
models designed for mobile communications Keysight 66319B/D or 66321B/D) can be used for
current consumption measurements, acting also as supply source for the SARA-N3 module mounted
on the adapter board, as illustrated in
12 V Main power switch
Step - down
(J400) (SW400)
EVB-WL3
Figure 7: Block diagram of current consumption setup for SARA-N3 series modules using a DC power analyzer
UBX-19004195 - R06
C1-Public
5.
Cellular VCC supply jumper socket (J155)
to be removed for SARA-N3 module
current consumption measurements
Figure 6.
Digital multimeter
DCI
+
3.8 V
VCC jumper VCC jumper
(J404) (J155)
SARA-N3 adapter board
Figure 7.
Power analyzer
PSU
GND
GND
3.8 V
VCC jumper VCC jumper
(J404) (J155)
SARA-N3 adapter board
Appendix
–
SARA-N3
VCC
Cellular
module
+
SARA-N3
VCC
Cellular
module
EVK-N3 - User guide
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