LG KP500 - Page 104

- 105 -
5. Trouble shooting
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5.15.5 Checking PAM Control Signals
R
S
V
D1
4
VB
ATT
5
V
R
AM
P
6
SM
_
I
N
7
M
OD
E
1
BS
3
PCS_I
N
2
8
5
26
C
IN
D
I
ND
626
C
7
4406
R
IN
D
4
2
6
C
226
C
743
0
6
R
p93
p
0
0
10
1
6
C
7
4
5
0
6
R
p0
01
3
16C
7
4
20
6
R
3
2
6
C
IN
D
L
EVE
L_
A
P
A
P
_NOX
T
D
N
AB
_
A
P
E
D
OM
_A
P
N
I_
MAP
_
D
NABH
N
I
_
MA
P_
DNAB
L
TXON_PA PA_LEVEL MODE MODE
TP3
(
PA MODE
)
TP2
(
TXON PA
)
TP1
(
PA LEVEL
)
Figure 25. Transceiver Output
Figure 24. PAM Control Signals
Table 4. PAM Mode Operation
Checking Points
MODE MODE PA_LEVEL TXON_PA
GMSK LOW Ramp Burst Control HIGH
8PSK HIGH Control Amp bias HIGH
TP2(TXON PA)
TP3(PA_MODE)
TP1(PA LEVEL)