LG KF690 Service Manual page 124

Main RF signal
Main RF signal
GSM 900 TX
DCS TX
PCS TX
GSM 900 RX
DCS RX
PCS RX
TX_I/Q
RX_I/Q
Control signal
Con trol sign al
GSM PA_CTL signal
GSM_PA_BAND
GSM_PA_EN
GSM_PA_RAMP
RF Tranceiv er_CTL sign al
SSBDT_RTR
FEM_CTL signal
ANT_SEL 0,1,2
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
GSM 900 TX RF Signal
DCS TX RF Signal
PCS TX RF Signal
GSM 900 RX RF Signal
DCS RX RF Signal
PCS RX RF Signal
I/Q for Tx of RF
I/Q for Rx of RF
DCS or PCS /GSM Mode Selection
Power Amp. Gain Control Enable
Power Am p. Gain Con trol
TX_ON RF Enable Signal
Bidirec tional SSBI Data
Ant S witch Module Mod e Selection
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6. BLOCK DIAGRAM
Description
Description
Comment
Com ment
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx
LGE Internal Use Only