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(3) Checking Ant SW & Mobile SW
TEST POINT
CIRCUIT
ANT_SW3
ANT_SW2
ANT_SW1
Waveform
VC1 LOW
VC2 LOW
VC3 HIGH
FEM Control EGSM
Graph 4-6(a)
C414
C415
C416
Figure 4-5
LMSP54LA-445TEMP
C414
C415
C416
27p
27p
27p
- 65 -
4. TROUBLESHOOTING
FL400
VC3
GSM1900_RX
12
6
VC2
GSM1800_RX
9
4
VC1
GSM900_RX
11
2
GND7
16
GND6
15
GND5
14
GND4
GSM18001900_TX
7
8
GND3
GSM900_TX
5
10
GND2
3
GND1
1
VC1 LOW
VC2 HIGH
VC3 LOW
FEM Control DCS & PCS
Graph 4-6(b)
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