LG L602i Service Manual page 136

Main RF signal (black)
GSM TX : GSM Tx RF signal
GSM RX : GSM 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 TX : UMTS Tx RF signal
UMTS RX : UMTS Rx RF signal
TX_I/Q : I/Q for Tx of RF
RX_I/Q : I/Q for Rx of RF
Control signal(red)
ANT_SEL 0,1,2 : Ant Switch Module Mode Selection
(WCDMA, GSM Tx/Rx, DCS Tx/Rx, PCS Tx/Rx)
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
GSM/DCS_VCO_EN
GSM_VCO_EN : GSM band Tx VCO Enable
DCS_VCO_EN : DCS band Tx VCO Enable
UMTS PA_CTL signal
PA_ON : WCDMA Tx Power Amp Enable
PA_RANGE0 : WCDMA Tx Power Amp Gain Control
TRK_LO_ADJ : TCXO(19.2M) Control
TX_AGC_ADJ : UMTS TX gain control
SBI(SERIAL BUS INTERFACE)
SBST : Serial bus strobe signal
SBDT : Serial bus data line
SBCK : Serial bus clock
6. BLOCK DIAGRAM
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