LG L704I Service Manual page 148

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 2100 Tx RF signal
UMTS 2100 RX : UMTS 2100 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 : Front End 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 : Power Amp Gain Control Enable
GSM_PA_RAMP : Power Amp Gain Control
UMTS PA_CTL signal
PA_ON1,2 : UMTS Tx Power Amp Enable
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 149 -
6. BLOCK DIAGRAM
LGE Internal Use Only