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3. TECHNICAL BRIEF
GS290 Operational Description Revision B
LG Electronics 60/136 LGE Property
3.20. Front End Module control
Implemented in the S-Gold3 (FL500) are two outputs which are VC1, VC2 for direct control of front end modules
with two logic input pins to select RX and TX mode as well as low and high band operation..
Table 8 FEM Control Logic
Figure 27 FEM schematic
22p
C524
22p
R501
KMS-518_P
SW500
G1
A
C
G2
100n
L501
0.5p
C510
C539
DNI
100R502
100R504
C503
47p
C508
47p
ANT500
DNI
C519
LMSP43NA-782
FL500
0
2
9131
11
81
5
18
417
216
9
5
4
013
612
1
17
ANT
1XR
0
58
MS
G
2X
R
05
8
MSG
1CV
1XR00
9
MSG 2CV
2XR009MSG
1X
R0
0
81
MS
G 1DNG
2X
R0
08
1
MSG
2DNG
1X
R
009
1
MSG 3DN
G
2X
R
009
1
MSG 4
D
N
G
5DNG
XT0091_0081MSG
X
T
0
09_
0
58MSG 1CN
2
C
N
0
R510
VC1
VC2
L
L
GSM 1800 / 1900_ RX
GSM850 / 900_RX
VC2 (FE2)
H
H
L
GSM850 / 900_TX
L L
L
GSM 1800 / 1900_ TX
VC1 (FE1)
CI:$0.05(CMOS->PIN)
GS290 Operational Description Revision B
LG Electronics 60/136 LGE Property
3.20. Front End Module control
Implemented in the S-Gold3 (FL500) are two outputs which are VC1, VC2 for direct control of front end modules
with two logic input pins to select RX and TX mode as well as low and high band operation..
Table 8 FEM Control Logic
Figure 27 FEM schematic
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