
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TX Part Trouble Shooting(4)
5. Check PAM Circuit
➀
PAM input and output
•
Tx Carrier Frequency
- GSM 190Ch. : 836.6MHz
- PCS 661Ch. : 1880.0MHz
•
PAM output power
- GSM : about 33dBm
- PCS : about 30dBm
Check these points with High
Frequency Probe.
You can see RF signal at
Spectrum Analyzer !
GSM
OUT
PAM
U503
PCS
IN
PCS
OUT
VBAT
GSM
IN
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Summary of Contents for LG9200
Page 3: ... 4 Z 3 X B O X C O M ...
Page 107: ... 120 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 108: ... 121 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 109: ...8 PCB LAYOUT 122 Z 3 X B O X C O M ...
Page 110: ... 123 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 111: ... 124 Z 3 X B O X C O M ...
Page 116: ...9 Calibration 129 E Calibration Equipment Setup Z 3 X B O X C O M ...
Page 123: ... 136 Z 3 X B O X C O M ...
Page 142: ...Note Z 3 X B O X C O M ...