Vol. VI-B-26 Alcatel-Lucent
Probable Cause
Equipment malfunction.
Recommended Actions
Check Detected Tx Power in the CT Performance screen to confirm failed
operation. A Modulator Not Locked alarm, should mute the ODU Tx.
• Reboot (power off, pause, power on). If the alarm remains, replace the RAC.
• After rebooting, also check Modulator Failure alarm, which if active, confirms
a hardware failure.
Additional Information
A Tx mute is applied to prevent transmission of spurious signals.
RAC TX Cable IF Synth Not Locked
RAC TX cable IF synthesiser not locked. This is a critical alarm.
Probable Cause
Equipment malfunction.
Recommended Actions
Replace the RAC.
Additional Information
Alarm indicates the ODU cable Tx IF frequency is not locked. It is possible for
traffic to pass over a link with IF synthesisers not locked, but it will be errored
with a high BER. This may be checked using the Performance screen parameters
for the remote radio.
RAC and ODU Tx Cable IF synthesisers use a common 10 MHz clock in the
RAC. If the ODU Tx Synth Not Locked alarm is also active it confirms a fault
with the RAC 10 MHz clock.
ODU TX Cable IF Synth Not Locked
ODU TX cable IF synthesiser not locked. This is a critical alarm.
Probable Cause
Equipment malfunction.
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