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WM_PRJ_Q2686_PTS_001-010
June 30, 2009
Q2686 Wireless CPU
®
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:
Transmit band (Tx)
Receive band (Rx)
GSM 850
824 to 849 MHz
869 to 894 MHz
E-GSM 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 with a:
•
Digital low-IF receiver
•
Quad-band LNA (Low Noise Amplifier)
•
Offset PLL (Phase Locked Loop) transmitter
•
Frequency synthesizer
•
Digitally controlled crystal oscillator (DCXO)
•
Tx/Rx FEM ( Front-End Wireless CPU
®
) for quad-band GSM/GPRS
2.2.2
Baseband Functionalities
The digital part of the Q2686 Wireless CPU
®
is composed of a PCF5212
PHILIPS chip. This chipset uses a 0.18
μ
m CMOS mixed technology, which
allows massive integration as well as low current consumption.
2.3
Operating System
The Q2686 Wireless CPU
®
is designed to integrate various types of specific
process applications such as vertical applications (telemetry, multimedia,
automotive).
The Operating System offers a set of AT commands to control the Wireless
CPU
®
.
With this standard Operating System, some interfaces of the Wireless
CPU
®
are not available
because they are dependent on the peripheral devices
connected to the Wireless CPU
®
.
The Operating System is Open AT
®
compliant.