Cisco D9477-1 Installation And Operation Manual page 93

LCD
Description
RF (1-4) DC
PLL unlocked
RF (1-4)
EEPROM
failure
RF (1-4)
Exceeeded
max temp
RF (1-4) FEC
sync error
RF (1-4) Level
not calibrated
RF (1-4)
Output load
error
RF (1-4) Power
supply failure
RF (1-4) UC
Lock detect
error
RF (1-4) UC
PLL unlocked
78-717866-01 Rev D
Alarm
Probable Cause
Level
Major The Down Converter (DC) Phase Locked
Loop (PLL) synthesizer cannot lock. The
output frequency may not be corrected.
The RF Output field displays MUTED
when this condition exists.
Minor Modulator EEPROM failure. The
EEPROM on the modulator board is not
present or not operational. If this alarm is
set, RF calibration data will not be
available, activating the "RF (1-4) Level
not calibrated" alarm.
Minor The internal temperature of the MQAM is
more than 70°C.
Minor Modulator FEC synchronization error.
Minor One of the RF Level settings on the
MQAM is not calibrated to its frequency
or the EEPROM that stores the calibration
data is not operational.
Minor Incorrect modulator RF output load
impedance. The modulator MCU detected
a large amount of reflected RF power at
the output, indicating that the RF load
impedance at the output is not correct. A
disconnected RF output cable or a cable
that has a short usually causes this
condition.
Minor At least one internal power regulator
failed. The RF output is MUTED when
this condition exists.
Major The Up Converter (UC) PLL lock detect
signal is not working. The RF output is
MUTED when this condition exists.
Major The modulator UC PLL is unlocked. The
output frequency may not be correct. The
RF output is MUTED when this condition
exists.
Troubleshooting Alarm Messages
Check and Correct
Contact Cisco Services

Contact Cisco Services

Remove vent

obstructions
Provide more cooling

and ventilation
Check temperature-

sensing hardware
Check exhaust fan

Contact Cisco Services

Contact Cisco Services

Check the cable

connections to the RF
OUT ports on the back
panel of the MQAM
Contact Cisco Services

Contact Cisco Services

Contact Cisco Services

Contact Cisco Services

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