Table of Contents
Advertisement
3. TECHNICAL BRIEF
3.1 RF Technical Description
The RF platform of LG840G supports two different communication modes (WCDMA/GSM modes) including six communi-
cation bands (W1900/W850/GSM850/GSM900/GSM1800/GSM1900).
The all the RF blocks can be divided into three main parts, which are a WCDMA part, a GSM, and a Antenna switch
module. The simplified block diagram is shown in Figure 3.1.1
■ T3H RF Block Diagram
Main ANTENNA
FEM
LMSP33QJ
GSM1800/1900 RX2
GSM1800/1900 RX1
TRX2
TRX1
Duplexer
ANT
WCMDA_850
WCMDA_1900
Duplexer
LGE Internal Use Only
GSM900RX1
GSM900RX2
TX_HB
GSM1800/1900TX
TX_LB
GSM850/900TX
RX1
RX2
TX
TX
RX1
ANT
RX2
GSM900_RX_M
GSM900_RX_P
DCS/PCS_RX_P
DCS/PCS_RX_M
2G PAM
GSM_HB_TX
RF3194
HB_RFIN
HB_RFOUT
GSM_LB_TX
LB_RFIN
LB_RFOUT
GSM_PA_RAMP
VRAMP
W850 / GSM850_RX_P
W850 / GSM850_RX_M
RFIN_LB
BPF
RFOUT_LB
B9425
3G PAM
CPL_OUT
SKY77196
PWR_DET
RFOUT_HB
BPF
RFIN_HB
B9459
W1900_RX_P
W1900_RX_M
LG840G only supports RF Band GSM850/900/1800/1900
WCDMA 850/1900
- 16 -
3. TECHNICAL BRIEF
RX_IN_G_LBM
RX_IN_G_LBP
RX_IN_G_HBP
RX_IN_G_HBM
TX_OUT_G_HB
TX_OUT_G_LB
PA_DAC
RX_IN_U_G_LBP
RX_IN_U_G_LBM
TX_OUT_U_LB
PWR_DET_IN
TX_OUT_U_HB1
RX_IN_U_G_BH1P
RX_IN_U_G_BH1M
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main CLK
19.2MHz
Sleep CLK
32.768KHz
Advertisement
Table of Contents
Troubleshooting
