EVK-R6 - User guide

UBX-21035387 - R02

Appendix

Page 21 of 23

C1-Public

D Current consumption measurement

The current consumption of the cellular module can be measured on the EVK-R6 by removing the

jumper socket from the Cellular VCC supply jumper (J109 on the ADP-R6), described in Figure 6.

Cellular VCC supply jumper socket (J109)

to be removed for

LARA-R6 module

current consumption measurements

Figure 6: Jumper socket to be removed for cellular module’s 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

cellular module, with the digital multi-meter placed in series as illustrated in Figure 7.

LARA-R6 adapter board

LARA-R6

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 7: Block diagram of the setup for cellular module’s current consumption measurement using a current meter

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 3.8 V supply source for the cellular module

mounted on the adapter board, as illustrated in Figure 8.

LARA-R6 adapter board

LARA-R6

Cellular

module

EVB-WL3

Step - down

Main power switch

(SW400)

12 V

(J400)

3.8 V

VCC jumper

(J109)

VCC

Power analyzer

PSU

VCC jumper

(J404)

+

GND

GND

Figure 8: Block diagram of the setup for cellular module’s current consumption measurement using a DC power analyzer