Specifications

Wireless CPU
®
Q24 Series
General Description
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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.
WM_PGM_Q24NG_PTS_001-005 November 20, 2007
2.2.1 RF Functionalities
The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 and
GSM 850/PCS 1900 recommendations. The frequencies are given below:
GSM band Transmit band (Tx) Receive band (Rx)
GSM 850 824 to 849 MHz 869 to 894 MHz
EGSM 900 880 to 915 MHz 925 to 960 MHz
DCS 1800 1710 to 1785 MHz 1805 to 1880 MHz
PCS 1900 1850 to 1910 MHz 1930 to 1990 MHz
The Radio Frequency (RF) part is based on a specific quad-band chip. It includes a:
• Digital low-IF receiver,
• Quad-band LNAs (Low Noise Amplifier),
• Offset PLL (Phase Locked Loop) transmitter,
• Frequency synthesizer,
• Digitally controlled crystal oscillator (DCXO),
• Tx/Rx FEM (Front-End module) for quad-band GSM/GPRS.
2.2.2 Baseband Functionalities
The Wireless CPU
®
Q24 Series digital parts are based on the PHILIPS-VLSI chip (ONE
C GSM / GPRS Kernel).
This chipset uses a 0.25 µm CMOS mixed technology, which allows massive
integration as well as low current consumption.