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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. TROUBLE SHOOTING
5.13.4. Checking Transceiver Output Signals
Figure 20. Transceiver Output Circuit
Checking Points
Figure 21. Transceiver Output
Table 3. Transceiver Output Operation
Ramp Burst Control
8PSK
Fixed
GMSK
Transceiver Output
MODE
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
220N
C401
1V5_VRF
2V85_VRF
10
R404
0
0
4
U
2
7
2
6
B
M
P
20
19
18
17
16
15
14
13
1
2
2
1
2
2
1
1
3
2
0
1
4
2
9
5
2
8
6
2
7
7
2
6
8
2
5
9
2
4
0
3
3
1
3
2
2
3
1
33
34
35
36
37
38
39
40
41
GND4
GND3
VDDMIX2V8
VDDTX2V8
TX2
TX1
VDDTX1V5
VBIAS
FE2
A
1
E
F
X
A
8
V
2
S
AI
B
D
D
V
B
X
1
X
R
X
B
1
X
R
8
V
2
GI
D
D
D
V
X
2
X
R
A
D
2
X
R
K
L
C
2
D
N
G
5
V
1
GI
D
D
D
V
X
3
X
R
3
S
Y
S
F
3
X
R
2
S
Y
S
F
X
4
X
R
O
X
4
X
R
X
O
X
5
V
1
A
N
L
D
D
V
GND1
FSYS1
VDDXO2V8
EN
VDDVCO2V8
VCO_RC
VDDRX1V5
VDDRX2V8
10
R407
X400
1
4
GND
HOT
LBAND_PAM_IN
HBAND_PAM_IN
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)