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D Current consumption measurement
Measure the current consumption of the cellular module on the EVK-R6 and EVK-L6 by removing the
jumper socket from the Cellular VCC supply jumper (J109 on the ADP-R6 /L6), described in
Figure 6: Jumper socket to be removed for cellular module's current consumption measurement
A suitable external digital multi-meter (as the Keysight 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
cellular module, with the digital multi-meter placed in series as illustrated in
12 V
Main power switch
(J400)
(SW400)
EVB-WL3
Figure 7: Block diagram of the setup for cellular module's current consumption measurement using a current meter
Alternatively, a suitable external DC power supply with the 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 3.8 V supply source for the cellular module
mounted on the adapter board, as illustrated in
12 V
Main power switch
(J400)
(SW400)
EVB-WL3
Figure 8: Block diagram of the setup for cellular module's current consumption measurement using a DC power analyzer
UBX-21035387 - R03
C1-Public
3.8 V
Step - down
VCC jumper
(J404)
3.8 V
Step - down
VCC jumper
(J404)
Cellular VCC supply jumper socket (J109)
to be removed for
LARA-R6 / LARA-L6 module
current consumption measurements
Digital multimeter
DCI
+
–
LARA-R6
VCC
Cellular
VCC jumper
module
(J109)
LARA-R6 adapter board
Figure
8.
Power analyzer
PSU
GND
+
GND
LARA-R6
VCC
Cellular
VCC jumper
module
(J109)
LARA-R6 adapter board
Appendix
EVK-R6 and EVK-L6 - User guide
Figure
7.
Figure
6.
Page 25 of 27
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