LG KU250 Service Manual - Page 138
Main RF signal, Control signal
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Main RF signal 6. BLOCK DIAGRAM Control signal Control signal UMTS PA_CTL signal PA_R0 GSM PA_CTL signal GSM_PA_BAND GSM_PA_EN GSM_PA_RAMP ANT_SEL 0,1 Description Comment 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 UMTS, GSM900Tx/Rx, DCS Tx/Rx, PCS Tx/Rx - 139 -
6. BLOCK DIAGRAM
- 139 -
Main RF signal
Control signal
Control signal
Description
Comment
UMTS PA_CTL signal
PA_R0
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
Ant Switch Module Mode Selection
UMTS,
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx