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5.13.4. Checking Transceiver Output Signals
TP1(LBNAD_PAM_IN)
LBAND_PAM_IN
HBAND_PAM_IN
TP2(HBNAD_PAM_IN)
1V5_VRF
Checking Points
TP1(LBNAD_PAM_IN)
TP2(HBNAD_PAM_IN)
MODE
GMSK
8PSK
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
FE2
33
VBIAS
34
VDDTX1V5
35
TX1
36
TX2
37
VDDTX2V8
38
VDDMIX2V8
39
R412
C436
GND3
40
10
0.22u
GND4
41
2V85_VRF
R418
10
C443
C444
0.22u
0.1u
Figure 22. Transceiver Output Circuit
Figure 23. Transceiver Output
Transceiver Output
Fixed
Ramp Burst Control
Table 3. Transceiver Output Operation
- 101 -
5. Trouble shooting
1V5_VRF
C430
0.1u
VDDRX2V8
20
VDDRX1V5
U403
19
R411
VCO_RC
PMB6272
18
820
VDDVCO2V8
17
EN
16
VDDXO2V8
15
FSYS1
14
GND1
13
C438
1000p
BT_CLK
LGE Internal Use Only
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Troubleshooting
