LG KU380 Service Manual page 141

6. BLOCK DIAGRAM
Main RF signal
Main RF signal
GSM 900 TX
DCS TX
PCS TX
UMTS2100 TX
GSM 900 RX
DCS RX
PCS RX
UMTS2100 RX
TX_I/Q
RX_I/Q
Control signal
Control signal
UMTS PA_CTL signal
GSM PA_CTL signal
GSM_PA_BAND
GSM_PA_EN
GSM_PA_RAMP
ANT_SEL 0,1
LGE Internal Use Only
GSM 900 TX RF Signal
DCS TX RF Signal
PCS TX RF Signal
UMTS2100 TX RF Signal
GSM 900 RX RF Signal
DCS RX RF Signal
PCS RX RF Signal
UMTS2100 RX RF Signal
I/Q for Tx of RF
I/Q for Rx of RF
PA_R0 UMTS Tx High/Low Power Control
DCS or PCS /GSM Mode Selection
Power Amp Gain Control Enable
Power Amp Gain Control
Ant Switch Module Mode Selection
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Description
Description
Copyright © 2007 LG Electronics. Inc. All right reserved.
Comment
Comment
UMTS,
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx
Only for training and service purposes