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3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
3.1 GENERAL DESCRIPTION
The LGV909 supports UMTS-900, AWS, UMTS-2100, GSM-850, 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.
MDM6200 RF
FEM
WCDMA
2100
DPX
WCDMA
DPX
WCDMA
1700
DPX
Analog
SW
LGE Internal Use Only
GSM PA
900
WCDMA
2100/1700
SAW
WCDMA
900
SAW
[Figure 1-1] Block diagram of RF part
WCDMA
2100
900
PA
WCDMA
1700
PA
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Copyright © 2011 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
MDM6200
Only for training and service purposes
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Troubleshooting
