4.14.4. Checking Transceiver Output Signals
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 97 -
MODE
Transceiver Output
GMSK
Fixed
8PSK
Ramp Burst Control
Figure 20. Transceiver Output Circuit
Figure 21. Transceiver Output
Table 3. Transceiver Output Operation
Checking Points
C434
0.1u
10
R411
X400
26MHz
GND1 2
4
GND2
HOT1
1
3
HOT2
2V85_VRF
C443
NX3225SA
220n
VDDRX2V8
20
35
VDDTX1V5
VDDTX2V8
38
VDDVCO2V8
17
15
VDDXO2V8
11
XO
XOX
12
RX2
27
28
RX2X
24
RX3
RX3X
25
22
RX4
RX4X
23
TX1
36
TX2
37
VBIAS
34
18
VCO_RC
VDDBIAS2V8
31
VDDDIG1V5
8
5
VDDDIG2V8
VDDLNA1V5
21
39
VDDMIX2V8
19
VDDRX1V5
3
B
BX
4
7
CLK
DA
6
EN
16
32
FE1
33
FE2
FSYS1
14
FSYS2
10
9
FSYS3
GND1
13
26
GND2
GND3
40
41
GND4
RX1
29
30
RX1X
PMB6272
U401
1
A
AX
2
220n
C440
1V5_VRF
R410
820
0.1u
C433
47n
C437
C444
0.1u
R412
10
BT_CLK
HBAND_PAM_IN
LBAND_PAM_IN
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
Содержание KF350
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