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(4) Checking RX IQ
TEST POINT
Waveform
Checking Flow
Check C619,C620.
Check if there is any
Refer to graph 4-4
VCC3
I+_TX_I+
I-_TX_I-
Q-_TX_Q-
Q+_TX_Q+
VCC1
PED_SELECT
Graph 4-4
Major difference
Yes
Redownload software and calibration again
4. TROUBLE SHOOTING
CIRCUIT
C612
22u
C613
4.7u
C614
33p
1
C615
0.1u
2
3
4
5
6
7
No
No
Similar?
- 63 -
C619
39p
C620
VBAT
39p
Replace U602
IP
IN
QN
QP
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