EVK-R4 - User guide
UBX-16029216 - R07
Appendix
Page 26 of 31
C1-Public
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
Cellular VCC supply jumper socket (J404)
to be removed for SARA-R41xM module
current consumption measurements
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
SARA-R4 adapter board
SARA-R4
Cellular
module
42
-p
in
D
IL
B
2B
con
nect
ors
EVB-WL3
Step - down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
VCC
Digital multimeter
DCI
+
–
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
SARA-R4 adapter board
SARA-R4
Cellular
module
42
-p
in
D
IL
B
2B
c
onne
ct
or
s
EVB-WL3
Step - down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
VCC
Power analyzer
PSU
GND
GND
+
Figure 11: Block diagram of current consumption setup for SARA-R410M / SARA-R412M modules using a DC power analyzer