EVK-R5 - User guide

UBX-19042592 - R05

Appendix

Page 20 of 23

C1-Public

D Current consumption measurement

The current consumption of SARA-R5 series modules can be measured on the EVK-R5 by removing

the jumper socket from the Cellular VCC supply jumper J109 available on the ADP-R5 board, as shown

in Figure 5.

Cellular VCC supply jumper socket (J109)

to be removed for SARA-R5 module

current consumption measurements

Figure 5: Jumper socket to be removed for SARA-R5 series modules current consumption measurement

A suitable external digital multi-meter (as for example the Keysight/Agilent 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-R5 module mounted on the adapter board, with the digital multi-meter

placed in series as illustrated in Figure 6.

SARA-R5 adapter board

SARA-R5

Cellular

module

EVB-WL3

Step - down

Main power switch

(SW400)

12 V

(J400)

3.8 V

VCC jumper

(J109)

VCC

Digital multimeter

DCI

+

–

VCC jumper

(J404)

Figure 6: Block diagram of current consumption setup for SARA-R5 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 supply source for the SARA-R5 module mounted on the adapter board.

E Declaration of conformities

The equipment is intended for indoor usage. It is the user’s duty to verify if further restrictions apply,

such as in airplanes, hospitals or hazardous locations (petrol stations, refineries…). Any changes or

modification made to this equipment will void its compliance to the safety requirements.

Maintenance, inspections and/or repairs of the EVK-R5 shall be performed by u-blox AG.