Alcatel-Lucent 9500 MXC User Manual page 743

Additional Information
ADC Failure (ODU)
Probable Cause
Recommended Actions
Additional Information
RAC -48V Supply
Probable Cause
Recommended Actions
3DB 23063 ADAA - Rev 004 July 2007
• If there are no other alarms except downstream Demodulator Not Locked, and
path warning alarms, reboot (power-off, pause, power on).
• If other hardware alarms are present, check for a common cause, such as an
NCC power supply or process failure. Reboot, and if the alarms remain, replace
the NCC.
This alarm is only checked at power-on, reconfiguration, or software reload. Loss
of communications to the demodulator means its configuration cannot be loaded.
No communications with the analog to digital converter. This is a warning alarm.
Equipment malfunction.
1. Check for other alarms to determine how critical the failure is. Depending on
the malfunction, the Node/Terminal may otherwise operate satisfactorily.
2. Reboot (power off, pause and power-on). If the alarm persists, replace the
ODU.
The ADC in the ODU is used to monitor voltages for presentation to the NCC/
IDU. A failure will affect RSL, Detected TX Power, and ODU voltage and
temperature readings.
RAC -48 volt supply out of tolerance. This is a warning alarm.
Main 48 Vdc power supply to ODU is outside alarm limits of -40.5 to -60 Vdc.
1. Check for other alarms to determine how critical the alarm is. In particular
check the NCC -48V alarm and the ODU -48V Supply alarm. Depending on
the malfunction, the link may otherwise operate satisfactorily.
2. Check the -48V ODU supply voltage in the CT Performance screen. This, and
NCC and ODU -48 Vdc alarms indicate an out-of-tolerence -48 Vdc supply
9500 MXC User Manual
Vol. VI-B-17