LG U310 Service Manual page 42

3. TECHNICAL BRIEF
B. RFR6250E(WCDMA_Rx)
• SBST,SBDT,SBCK : SBI I/F signals for control Sub-chipset
• RX_I/Q, : I/Q for Rx of RF
C. the others
• GSM_PA_BAND : DCS/GSM Band Selection of Power Amp
• TRK_LO_ADJ : TCXO(19.2M) Control
• PA_ON : WCDMA TX Power Amp Enable
• ANT_SEL[0-2] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS Tx/Rx)
• GSM_PA_RAMP : Power Amp Gain Control of APC_IC
• GSM_PA_EN : Power Amp Gain Control Enable of APC_IC
• GSM_TX_VCO_0_EN_N : GSM Band Tx VCO Enable of Dual VCO
• GSM_TX_VCO_1_EN_N : DCS Band Tx VCO Enable of Dual VCO
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