LG KF700 Service Manual page 143

6. BLOCK DIAGRAM
Main RF signal
Main RF signal
GSM 900 TX
DCS TX
PCS TX
W- TX
GSM 900 RX
DCS RX
PCS RX
W- RX
TX_I/Q
RX_I/Q
Control signal
Con trol sign al
UMTS PA_CTL signal
GSM PA_CTL signal
GSM_PA_BAND
GSM_PA_EN
GSM_PA_RAMP
RF Tranceiv er_CTL sign al
SSBDT_RTR
TX_AGC_ADJ
FEM_CTL signal
ANT_SEL 0,1,2
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_R1 UMTS Tx Hi gh/Lo w Power Con trol
PA_ON Power Am p. Enable
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
UMTS Transmit Gain Control
Ant S witch Module Mod e Selection
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Description
Description
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Comment
Com ment
UMTS,
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx