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CHECKING FLOW
Check R103,R104
Check whether Ant SW
Set as TX mode
♦
Refer to Graph 5
♦
Refer to Table 4-3
Check RF Level of
U104 Pin 9(for GSM) & Pin 3 (for DCS)
Check U100.ANT, RF with RF
Cable connected.
Check U100.ANT,RF
with RF Cable disconnected
For the test,
TX Stand alone Mode is needed. Refer to
chapter 11 (PL=7 for GSM, PL=2 for DCS)
Check VC_EGSM,
VC_DCSPCS
Yes
Pin9 : ~29.5dBm
Pin 3 : ~26.5dBm
Yes
Open
Yes
Short
Yes
END
-45-
4. TROUBLE SHOOTING
No
Changing board
Go to 4.3.5 Checking PAM
No
control signal
No
Changing U100
No
Changing U100
ANT SW
VC_GSM VC_CDSPCS
PCS TX
0
GSM TX
1
GSM, PCS RX
0
Table 4-3
1
0
0
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