LG HB620 Service Manual page 150

Control signal
Con trol signal
UMTS PA_CTL signal
PA_R1
PA_ON
GSM PA_CTL signal
GSM_PA_BAND
GSM_PA_EN
GSM_PA_RAMP
RF Tranceiv er_CTL signal
TX_ON
SSBDT_RTR
TX_AGC_ADJ
FEM_CTL signal
ANT_SEL 0,1,2
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Description
UMTS Tx Hi gh/Lo w Power Control
Power Am p. Enable
DCS or PCS /GSM Mode Selection
Power Amp. Gain Control Enable
Power Am p. Gain Con trol
RF Enable Signal
Bidirec tional SSBI Data
UMTS Transmit Gain Control
Ant S witch Module Mod e Selection
- 151 -
6. BLOCK DIAGRAM
Com ment
UMTS,
GSM900Tx/Rx,
DCS Tx/Rx,
PCS Tx/Rx
LGE Internal Use Only