LG KF700 Service Manual page 109

4. TROUBLE SHOOTING
ANTENNA SW LOGIC for M112(Epcos)
GSM850/GSM900 TX
GSM1800/GSM1900 TX
WCDMA
GSM850 RX
GSM900 RX
GSM1800 RX
GSM1900 RX
- GSM900 Tx
- UMTS Tx/Rx
LGE Internal Use Only
ANT_SEL0
H
H
H
L
L
L
L
[Table 4.1] Logic Table of the FEM
- DCS1800/PCS1900 Tx
- GSM900 Rx
- 110 -
ANT_SEL1
L
H
L
L
L
H
H
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Only for training and service purposes
ANT_SEL2
L
L
L
L
H
H
L