Ublox EVK-R2, User Manual

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EVK-R2 - User Guide
UBX-16016088 - R10 Appendix Page 24 of 27
D Current consumption measurement
The current consumption of TOBY-R2 or LARA-R2 series modules can be measured on the EVK-R2 by
removing the jumper socket from the Cellular VCC supply jumper (J404 on the EVB), described in
Figure 6 .
Cellular VCC supply jumper socket (J404)
to be removed for
TOBY-R2 or LARA-R2 module
current consumption measurements
Figure 6: Jumper socket to be removed for TOBY-R2 or LARA-R2 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
TOBY-R2 or LARA-R2 module mounted on the adapter board, with the digital multi-meter placed in
series as illustrated in
Figure 7 .
TOBY-L2 or LARA-R2
adapter board
TOBY-R2
or
LARA-R2
Cellular
module
42
-p
in
D
IL
B
2B
c
on
nect
ors
EVB-WL3
Step - Down
Main power switch
(SW400)
12 V
(J400)
3.8 V
VCC jumper
(J404)
VCC
Digital Multimeter
DCI
+ –
Figure 7: Block diagram of current consumption setup for TOBY-R2 or LARA-R2 series modules
Alternatively, a suitable external DC power supply with the dynamic current measurement capabilities
(as for example, the Agilent 66319B/D) can be used for current consumption measurements, acting
also as the 3.8 V supply source for the TOBY-R2 or LARA-R2 module mounted on the adapter board.