Sierra Wireless AIRPRIME WISMO218 - Manual (Page 22)

WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 22
Product Technical Specification &
Customer Design Guidelines General Description
2.2.1. RF Functionalities
The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 recommendation.
The frequency range for the transmit band and receive band are listed in the table below.
Transmit Band (Tx) Receive Band (Rx)
E-GSM 900 880 to 915 MHz 925 to 960 MHz
DCS 1800 1710 to 1785 MHz 1805 to 1880 MHz
The RF part of the AirPrime WISMO218 is based on a specific dual band chip which includes:
 a Digital low-IF receiver
 a dual-band LNAs (Low Noise Amplifier)
 an Offset PLL (Phase Locked Loop) transmitter
 a Frequency synthesizer
 a Digitally controlled crystal oscillator (DCXO)
 a Tx/Rx FEM (Front-End Module) for dual-band GSM/GPRS
2.2.2. Baseband Functionalities
The Baseband is composed of an ARM9, a DSP and an analog element (with audio signals, I/Q
signals and ADC).
The core power supply is 1.2V and the digital power supply is 2.8V.