W Sub System - LG -P500 Service Manual

3.12 H/W Sub System
3.12.1. RF Interface
3.12.1.1. RTR6285 (WCDMA_Tx, GSM_Tx/Rx)
MSM7227 controls RF part(RTR6285) using these signals.
-RTR6285_SSBI : SSBI I/F signals for control Sub-chipset
-RTR_TXON : Power AMP on RF part
-RTR_RX_I/Q_M/P, RTR_TX_I/Q_M/P : I/Q for T/Rx of RF
-RTR_DAC_REF : Reference input to the MSM Tx data DACs
3.12.1.2. the others
TRK_LO_ADJ : TCXO(19.2M) Control
PA_ON0/PA_RANGE0 : WCDMA(2100) TX Power Amp Enable
ANT_SEL[0-3] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS-PCS Tx/Rx)
GSM_PA_RAMP : Power Amp Gain Control of APC_IC
3.12.1.3. RF2815 (GPS LNA)
* GPS_LNA_EN : GPS LNA Enable Signal (GPS LNA Shutdown)
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Only for training and service purposes
Figure. RF Interface Block Diagram
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3. TECHNICAL BRIEF
LGE Internal Use Only