Technical Brief; General Description - LG U370 Service Manual

3. TECHNICAL BRIEF

3.1 General Description

The U370 supports UMTS-2100, GSM-900, DCS-1800, and PCS-1900 based GSM/GPRS/UMTS. All
receivers and the UMTS transmitter use the radioOne
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 signal to RF.
1 QUALCOMM's branded chipset that implements a Zero-IF radio architecture.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1 Zero-IF architecture to eliminate intermediate
[Fig 1.1] Block diagram of RF part
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3. TECHNICAL BRIEF
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