Technical Brief; General Description - LG GT810h Service Manual

3. TECHNICAL BRIEF

3.1 GENERAL DESCRIPTION

The GT810h supports UMTS-850(Band V), UMTS-1900(Band I), UMTS-2100(Band I), 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 up-conversion followed by an offset phase-locked loop that translates the GMSK-modulated or 8-
PSK-modulated signal to RF.
1 QUALCOMM's branded chipset that implements a Zero-IF radio architecture.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
[Fig. 3.1] Block diagram of RF part
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3. TECHNICAL BRIEF
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