9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. VI-B-15
2. Component failure (short circuit) within the ODU.
Recommended Actions
1. Disconnect the ODU cable at the RAC front panel and use a multimeter to
check the resistance between inner and outer conductors of the ODU cable. It
should measure approximately 0.3 Megohms.
2. If the reading is low, indicating a short circuit, disconnect the ODU cable at
the ODU and measure cable resistance, and resistance looking into the ODU.
3. Once the fault has been identified and cleard, the RAC must be replaced; the
PCB-mounted fuse is not field replaceable.
Additional Information
ODU input resistance at its Type N connector is nominally 0.3 Megohms.
EEPROM Failure (All)
No communications with the EEPROM. This is a warning alarm.
Probable Cause
Equipment or process malfunction.
Recommended Actions
1. Check for other alarms to determine how critical the alarm is. Depending on
the malfunction, the terminal may otherwise operate satisfactorily.
2. Reboot the plug-in by withdrawing it from its backplane, pausing, and
re-inserting. If the alarm remains, replace it.
Additional Information
The EEPROM supports plug-in identity and internal calibration functions.
Clock Generator Failure (RAC)
Unable to communicate with the clock generator. This is a critical alarm.
Probable Cause
Equipment or process malfunction.
Recommended Actions
Check for other alarms:
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