Tait TM8100 mobiles Service Manual page 261

Task 11 —
FE Tune BPF Settings
Task 12 —
RSSI Delta Gain
Task 13 —
AGC Delta Gain
TM8100/TM8200 Service Manual
© Tait Electronics Limited November 2007
If the AGC voltage calibration is correct, check the FE tune BPF settings.
Note the settings listed in the "FE Tune BPF Settings" field.
1.
The nominal settings should be as listed in
2. If the settings are correct, go to
3. Recalibrate the receiver and check the settings again.
4. If the settings are now correct, go to
Task 1 of "Faulty Receiver Sensitivity" on page 248
receiver sensitivity.
5. Check if the RSSI fault has been removed. If it has, go to
Tasks" on page
If the FE tune BPF settings are also correct, check the RSSI delta gain
values.
1. Note the values listed in the "Rx Delta Gain Values" field. The values
should be between 0dBm and about –3dBm.
2. If the values are as expected, go to
Step 3.
3. Recalibrate the receiver and check the values again.
4. If the values are now correct, go to
Task 1 and check the receiver sensitivity.
5. Check if the RSSI fault has been removed. If it has, go to
Tasks" on page
If the RSSI delta gain values are also correct, check the AGC delta gain
values.
Note the values listed in the "AGC Delta Gain Values" field. The values
1.
should run gradually from 0dBm to about 35dBm.
2. If the values are as expected, go to
Step 3.
3. Recalibrate the receiver and check the values again.
4. If the values are now correct, go to
Task 1 and check the receiver sensitivity.
5. Check if the RSSI fault has been removed. If it has, go to
Tasks" on page
6. In this case all the RSSI calibration settings are correct, but there is
still an RSSI fault. Go to
Task 12. If they are not, go to
Step
163. If it has not, go to
Task
Step
163. If it has not, go to
Step
Step
163. If it has not, go to
Task 1 and check the receiver sensitivity.
Table 10.2.
Step
5. If they are not, go to
and check the
"Final
Task 12.
13. If they are not, go to
5. If they are not, go to
"Final
Task 13.
6. If they are not, go to
5. If they are not, go to
"Final
Step 6.
Receiver Fault Finding
3.
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