WMOi3 integrated Modem
confidential
©
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement. Ce document est la propriété exlcusive de WAVECOM. Il ne peut
être communiqué ou divulgué à des tiers sans son autorisation préalable.
11
3.2.4.4
Speaker 1
Speaker outputs SPK1 are push-pull amplifiers and can be loaded down to 50
Ohms and up to 1nF. These outputs are differential and the output power can
be adjusted by step of 2dB. The output can be directly connected to a speaker.
The connection can be differential or single-ended but using a differential
connection to reject common mode noise and TDMA noise is recommended.
When using a single-ended connection, be sure to have a very good ground
plane, a very good filtering as well as a shielding in order to avoid any
disturbance on the audio path.
Pin description
Pin description
Pin description
Pin description
Signal
Signal
Signal
Signal
Pin #
Pin #
Pin #
Pin #
I/O
I/O
I/O
I/O
I/O type
I/O type
I/O type
I/O type
Description
Description
Description
Description
SPK1P
12
O
Analog
Speaker 1 positive output
SPK1N
14
O
Analog
Speaker 1 negative output
3.3
3.3
3.3
3.3
SIM Interface
SIM Interface
SIM Interface
SIM Interface
The provided SIM connector has been designed for 3V technology
for 3V technology
for 3V technology
for 3V technology SIMs only.
SIMs only.
SIMs only.
SIMs only.
The remote Sim connector must be placed at 10cm max. from the WMOi3.
3.4
3.4
3.4
3.4
RF Interface
RF Interface
RF Interface
RF Interface
The RF connector is MMCX (Miniature Micro Connector) standard type for a
surface mounting.
An antenna can be directly connected through the matting connector or using
a small MMCX / SMA adapter.
The antenna must comply with the following specifications :
EGSM
EGSM
EGSM
EGSM
PCS
PCS
PCS
PCS
Frequency RX
Frequency RX
Frequency RX
Frequency RX
925 to 960 MHz
1930 to 1990 MHz
Frequency TX
Frequency TX
Frequency TX
Frequency TX
880 to 915 MHz
1850 to 1910 MHz
Impedance
Impedance
Impedance
Impedance
50
