LG U8500 Service Manual page 44

B. RFR6250(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
• TRK_LO_ADJ
• PA_ON
• ANT_SEL[0-2]
• GSM_PA_RAMP
• GSM_PA_EN
• 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
: DCS/GSM Band Selection of Power Amp
: TCXO(19.2M) Control
: WCDMA TX Power Amp Enable
: Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS Tx/Rx)
: Power Amp Gain Control of APC_IC
: Power Amp Gain Control Enable of APC_IC
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3. TECHNICAL BRIEF