EVK-G31, EVK-G35 - User Guide
UBX-13001792 - R06
Early Production Information
Appendix
Page 20 of 22
D
Current consumption measurement
Current consumption of SARA-G3 series modules can be measured on the EVK-G3x by removing the jumper
socket from the
Cellular VCC supply jumper
(J404 on the EVB), described in Figure 5.
Cellular VCC supply jumper socket (J404)
to be removed for SARA-G3 module
current consumption measurements
Figure 5: Jumper socket to be removed for SARA-G3 series modules current consumption measurement
A suitable external digital multi-meter (as for example the Agilent 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-G3 module
mounted on the adapter board, with the digital multi-meter placed in series as described in Figure 6.
SARA-G3 adapter board
SARA-G3
Cellular
module
42
-p
in
DI
L
B
2B
c
o
n
n
ec
to
rs
EVB-WL3
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
VCC
Digital Multimeter
DCI
+ –
Figure 6: Block diagram of current consumption setup for SARA-G3 series modules
Alternatively, a suitable external DC power supply with dynamic current measurement capabilities (as for
example the Agilent 66319B/D) can be used for current consumption measurements, acting also as 3.8 V supply
source for the SARA-G3 module mounted on the adapter board.
