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4. TROUBLE SHOOTING
4.12.5. Checking PAM Control Signals
TP2(TXON PA)
C
4
2
0
C
4
2
0
0 .
1
u
0
0 .
TP3(PA_MODE)
TP3(PA MODE)
TP1(PA LEVEL)
TP2(TXON PA)
MODE
GMSK
8PSK
LGE Internal Use Only
T
Q
M
7
M
5
0
0
5
U
4
0
1
1
2
D
C
S
_
P
C
S
_
O
U
T
D
C
S
_
P
C
S
_
N I
1
0
G
S
M
8
5
0
_
9
0
0
_
O
U
T
M
O
D
E
_
S
E
L
E
C
T
1
3
B
Y
_
C
A
P
1
B
S
9
B
Y
_
C
A
P
2
V
B
A
T
T
1
4
G
N
D
1
V
R
A
M
P
1
1
G
N
D
2
8
G
N
D
3
T
X
_
E
N
1
5
1
P
G
N
D
G
S
M
8
5
0
_
9
0
0
_
N I
1
u
TP3(PA_MODE)
PAM Control Signals Circuit
Checking Points
Transceiver Output
MODE
LOW
HIGH
TP2(TXON PA)
1
2
3
TP1(PA LEVEL)
4
5
R
4
0
5
6
7
C
4
2
6
C
4
2
4
C
4
2
7
C
4
2
8
C
4
2
9
C
4
2
5
TP1(PA LEVEL)
3
3
u
1
u
2
7
p
1
0
0
p
1
0
0
p
4
7
p
PA_LEVEL
Ramp Burst Control
Control Amp bias
- 108 -
Copyright © 2008 LG Electronics. Inc. All right reserved.
R
4
0
4
H
B
A
N
D
_
P
A
M
_
N I
1
0
0
p
P
A
_
M
O
D
E
S
1
_
P
A
_
B
A
N
D
P
A
_
L
E
V
E
L
1
0
K
T
X
O
N
_
P
A
R
4
0
6
L
B
A
N
D
_
P
A
M
_
N I
1
0
0
p
C
4
3
0
1
0
0
p
TXON_PA
HIGH
HIGH
Only for training and service purposes
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Table of Contents
Troubleshooting
