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3. TECHNICAL BRIEF
3.1 GENERAL DESCRIPTION
The GT540 supports UMTS-900, UMTS-2100, GSM-850, GSM-850, GSM-900, GSM-1800, and GSM-1900 based
GSM/GPRS/EDGE/UMTS. All receivers and the UMTS transmitter use the radioOne1Zero-IF architecture to eliminate
intermediate frequencies, directly converting signals between RF and baseband. The quad-band GSM transmitters
use a baseband-to-IF upconversion followed by an offset phase-locked loop that translates the GMSK-modulated or
8-PSK-modulated signal to RF.
[Figure 1-1] Block diagram of RF part
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