LG L705i Service Manual page 144

Main RF signal
GSM900 TX: GSM900 Tx RF signal
GSM900 RX: GSM900 Rx RF signal
DCS TX: DCS Tx RF signal
DCS RX: DCS Rx RF signal
PCS TX: PCS Tx RF signal
PCS RX: PCS Rx RF signal
UMTS 800 TX: UMTS 800 Tx RF signal
UMTS 800 RX: UMTS 800 Rx RF signal
UMTS 2100 TX: UMTS 1900 Tx RF signal
UMTS 2100 RX: UMTS 1900 Rx RF signal
TX_I/Q: I/Q for Tx of RF
RX_I/Q: I/Q for Rx of RF
Control signal
ANT_SEL 0,1,2: Ant Switch Module Mode Selection
(UMTS, GSM900 Tx/Rx, DCS Tx/Rx, PCS Tx/Rx)
GSM PA_CTL signal
GSM_PA_BAND: DCS or PCS /GSM Mode Selection
GSM_PA_EN: DCS or PCS /GSM Power Amp Enable
GSM_PA_RAMP: DCS or PCS /GSM Power Amp Gain Control
UMTS PA_CTL signal
PA_ON0, 1: UMTS Tx Power Amp Enable
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6. BLOCK DIAGRAM
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