Sierra Wireless WISMO218 - Manual (Page 85)

WA_DEV_W218_PTS_002 Rev 005 Page 85 of 109
Product Technical Specification &
Customer Design Guidelines
Table 40. Equipment Reference List
Device Manufacturer Reference Notes
Communication Tester Rhode & Schwartz CMU 200
Quad Band
GSM/DCS/GPRS
Current measuring
power supply
Agilent 66321B Used for VBATT (for WMP alone)
Stand alone power
supply
Metrix AX502 Used for VBAT (for boards peripherals)
WISMO218 Development Kit
The WISMO218 Development Kit is used as a basis for the WISMO218 measurement via an adaptor
board. The WISMO218 Development Kit can be used to perform consumption measurement using
several settings. For the list and corresponding description of the settings, see document [3]
WISMO218 Development Kit User Guide and document [1] WISMO218 Hardware Presentation.
Note: The WISMO218 Development Kit can be replaced by Development Kit WMP100 once a suitable
socket-up board is available.
The WISMO218 is only powered by VBATT. The WISMO218 Development Kit board is powered by
the standalone power supply at VBAT. It is for this reason that the link between VBATT and VBAT
(J605) must be opened (by removing the solder at the top of the board in the SUPPLY area). Note the
following information regarding both power supplies.

VBATT is powered by the current measuring power supply (66321B)

VBAT is powered by the standalone power supply (AX502) through TP602
Also take note of the following additional configuration/settings:

The R600 resistor and the D603 and D604 diodes (around the BAT-TEMP connector) must be
removed.

The UART2 link is not used; therefore, J201, J202, J203, J204 must be opened (by removing the
solder).

The “FLASH-LED” must be not used, so J602 must be opened (by removing the solder).

The USB link is not used, therefore J301, J302, J303, J304, J305 must be opened (by removing
the solder).

The audio is not used, therefore J702, J703, J704, J705, J605 must be opened (by removing the
solder).

There is no SIM detect feature on the WISMO218; therefore, J403 must be opened (by
removing the soldered).

Charging is not used; therefore, R602 must be removed.

C600 and R607 must be removed to avoid unexpected current consumption.

The switch, BOOT (around the “CONFIG” area), must be set to the OFF position.
The goal of the settings listed above is to eliminate all bias current from VBATT and to supply the
entire board (except theWISMO218) using VBAT only.