D Current Consumption Measurement - u-blox EVK-R4 Series User Manual

D Current consumption measurement

D.1 EVK-R410M and EVK-R412M
The current consumption of the SARA-R410M and SARA-R412M modules can be measured on the
EVK-R4 by removing the jumper socket from the Cellular VCC supply jumper J404 available on the
EVB-WL3 as illustrated in
Figure 9: Jumper socket to be removed for SARA-R410M / SARA-R412M modules 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
SARA-R4 module, with the multi-meter placed in series as illustrated in
1 2 V Main power switch
Step - down
(J400)
(SW400)
EVB-WL3
Figure 10: Block diagram of current consumption setup for SARA-R410M / SARA-R412M modules using a multimeter
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 the 3.8 V supply source for the SARA-R4 module
mounted on the adapter board, as illustrated in
12 V Main power switch
Step - down
(J400) (SW400)
EVB-WL3
Figure 11: Block diagram of current consumption setup for SARA-R410M / SARA-R412M modules using a DC power analyzer
UBX-16029216 - R07
C1-Public
Figure 9.
Cellular VCC supply jumper socket (J404)
to be removed for SARA-R41xM module
current consumption measurements
Digital multimeter
DCI
+ –
3.8 V
VCC
VCC jumper
(J404)
SARA-R4 adapter board
Power analyzer
PSU
GND +
GND
3.8 V
VCC
VCC jumper
(J404)
SARA-R4 adapter board
Appendix
SARA-R4
Cellular
module
Figure 11.
SARA-R4
Cellular
module
EVK-R4 - User guide
Figure 10.
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