LG KS20 - Page 149

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6. BLOCK DIAGRAM
Main RF signal
Control signal
LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main RF signal Description Comment
GSM 900 TX GSM 900 TX RF Signal
DCS TX DCS TX RF Signal
PCS TX PCS TX RF Signal
UMTS2100 TX UMTS2100 TX RF Signal
GSM 900 RX GSM 900 RX RF Signal
DCS RX DCS RX RF Signal
PCS RX PCS RX RF Signal
UMTS2100 RX UMTS2100 RX RF Signal
TX_I/Q I/Q for Tx of RF
RX_I/Q I/Q for Rx of RF
Control signal Description Comment
UMTS PA_CTL signal
PA_R1 UMTS Tx High/Low Power Control
GSM PA_CTL signal
GSM_PA_BAND DCS or PCS /GSM Mode Selection
GSM_PA_EN Power Amp Gain Control Enable
GSM_PA_RAMP Power Amp Gain Control
ANT_SEL 0,1,2,3 Ant Switch Module Mode Selection
UMTS,
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx