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4. TROUBLE SHOOTING
(5) Checking TX IQ
TEST POINT
Waveform
Checking Flow
1
VCC3
2
I+_TX_I+
3
I-_TX_I-
4
Q-_TX_Q-
5
Q+_TX_Q+
6
VCC1
7
PED_SELECT
Graph 4-8
Check if there is
Any Major Difference
Refer to Graph 4 -8
Redownload the Software
And calibrate
CIRCUIT
C612
22u
C613
4.7u
C614
33p
C615
0.1u
VBAT
No
Replace U602
Similar?
Yes
- 70 -
IP
C619
39p
IN
QN
C620
39p
QP
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