Operation Manual

ID Name Class Severity Unit
127 APD linearizer alarm 0x0104 Error APD
Description
The APD linearizer is failing. This may be due to BW too high, check that all
signals are within what can be handled by the APD (15 MHz).
NOC Actions
Forward the problem to the engineers to check the signals that are f
ed to the
APD.
Field Actions
Check that all signals to the RU that contains the APD has a total B
W less than
15 MHz. If not, change BTS settings to make the signal fit within the 15 MHz
window. If that is not the problem then it is likely to be a hardware fault.
Troubleshooting
148
Multi-carrier Power Amplifier Interface (MPI) alarms
ID Name Class Severity Unit
1 AD Converter fault 0x0103 Error MPI
Description The AD converter on the board has failed. This is a hardware fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions
Replace remote unit, commission the replacement and arrange RMA for the
failed unit.
ID Name Class Severity Unit
2 EEPROM fault 0x0103 Error MPI
Description Read or write operation to EEPROM failed. This is a hardware fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions
Replace remote unit, commission the replacement and arrange RMA for the
failed unit.
ID Name Class Severity Unit
3 Calibration data 0x0103 Warning MPI
Description The calibration database is corrupt. This is a software error.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions
Replace remote unit, commission the replacement and arrange RMA for the
failed unit.
ID Name Class Severity Unit
4 DAC fault 0x0103 Warning MPI
Description The DAC has failed on the board. This is a hardware fault.
NOC Actions Dispatch field tech to change the remote unit.
Field Actions Replace remote unit.