A100 Training Course

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A100 Training Course
RF
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Presentation Outline

• Block Diagram
• Key Component
• Schematic
• Layout and Placement

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X300 Block Diagram-RF
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X300 TX Trace- Key Components I

• U1201
• P/N CX74963(Skyworks)
• Function Transceiver(Transmitter Receiver)
• Check items
• 1. TX IQ pin 1821(Oscillo-scope)
• 2. TXVCO GSM_pin54, DCS/PCS_pin55(RF
  probe)
• 3. UHFTUNE pin 45(Oscillo-scope)
• 4. TXVCOTUNE pin 56(Oscillo-scope)
• U1101
• P/N CX77324(Skyworks)
• Function Power Amplifier
• Check items
• 1. Vapc pin 22 (Oscillo-scope)
• 2. PA output GSM_pin12, DCS/PCS_pin17
• (RF probeAttenuator)

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X300 TX Trace-Key Components I

• U1102
• P/N LMSP54CA-142 (Murata)
• Function T/R Switch(Tx, Rx, band selection )
• Check item
• 1. Control logic pin2, pin4, pin10
  (Oscillo-scope)
• 2. RX GSM_pin11, DCS_pin1 , PCS_pin3 (RF
  probe)
• 3.TX GSM_pin7, D/PCS_pin5 (RF probe
  Attenuator)
• 4. Ant pin9 (RF Probe Attenuator)

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X300 RX Trace - Key Components I

• U1102(T/R Switch)
• U1261
• P/N SAFEJ942MAL0F00R05(Murata)
• Function Band pass SAW filter(GSM band
  selection)
• Check item Input_pin1, output_pin3(RF probe)
• U1271
• P/N B9019 (Epcos)
• Function Band pass SAW filter(DCS band
  selection)
• Check item Input_pin1, output_pin3(RF probe)

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X300 RX Trace - Key Components II

• U1272
• P/N EFCH1960TCB7(Panasonic)
• Function Band pass SAW filter(PCS band
  selection)
• Check item Input_pin1, output_pin3(RF probe)
• U1201
• P/N CX74963(Skyworks)
• Function Transceiver(Transmitter Receiver)
• Check item
• 1. RX IQ pin 4851(Oscillo-scope)
• 2. UHFTUNE pin 45(Oscillo-scope)

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X300 RF Schematic- I
RX IQ
GSM TX
DCS/PCS TX
GSM RX
DCSRX
TX IQ
PCS RX
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X300 RF Schematic- II
GSM TX
DCS/PCS TX
GSM RX
DCSRX
PCS RX
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X300 RF Layout and Placement
U1102 T/R SWITCH
U1261 GSM SAW
U1101 Power Amplifier
U1271 DCS SAW
U1272 PCS SAW
U1201 Transceiver
U1173 LDO
U1291 26MHz VCTCXO
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RF Troubleshooting
DUT
Connect With tester
1.check Tx path 2.check Rx path
Enter RF test mode
PASS
Fail
Auto-calibration
PASS
Check 1.antenna 2.antenna match
Change failed component
Fail
Fail
Enter RF test mode
RF section is ok, please check SW/ BB section
PASS
Check 1.TX Path (CxxOT) 2.RX Path(CxFxx,CxGxx)
See error code