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T/R Switch(U601)
Test point part
Function
U601, pin1
D_RX
U601, pin2
VC3
U601, pin3
P_RX
U601, pin4
VC2
U601, pin5
D_TX
U601, pin7
G_TX
U601, pin9
ANT
U601, pin10
VC1
U601, pin11
G_RX
Typical value
Description
DCS RX
2.8V
PCS RX control signal
PCS RX
2.8V
DCS, PCS TX control signal
DCS PCS TX
GSM TX
Antenna port
2.8V
EGSM TX control signal
GSM RX
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4. Troubleshooting
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