LG GT350 - Front End Module Control

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Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
LG Electronics 57/115 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
zHM
0
881
,
5
.
638
10
6
L
F
02 91 31
11
81
51 8
41
7
216
95
4
013 61
2 1
17
ANT
1XR058MSG
2XR058MSG
4
D
N
G
1XR
0
09MSG 2CV
2X
R0
09
MS
G
1XR0081MSG 1DNG
2XR0081MSG 2DNG
1X
R0
0
91MSG
1CV
2X
R
009
1
MSG
X
T
0
09_
0
58MSG
5DNG
XT0091_0081MSG
3DNG 1CN 2
C
N
CN601
2
6
5
43
1
NI
1
D
NG
2
D
NG
3
D
NG
4
D
N
G
TUO
100n
L601
8.2p
C637
22p
C604
100R606
100R607
C607
47pF 47pF
C610
DNI
C612
ANT601
12n
L608
VC1
VC2
(FROM Transceiver)
(FROM Transceiver)
CI:$0.05(CMOS->PIN)
LG Electronics 57/115 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