Cisco Model D-PCG1000 PowerKEY CAS Gateway Maintenance Manual
GoQAM, GQAM, and MQAM Modulator Front Panel LCD Alarm Messages
4019476 Rev C
49
RF Alarms
LCD Display
Severity
Probable Cause
Check and Correct
RF (1-4)
Comm Failure
Comm Failure
Major
Digital I/O board is not
communicating with the
modulator RF board MCU at the
specified RF OUT module (1-4).
This problem could be caused by
a loose or broken cable or by the
modulator MCU not being
programmed correctly
communicating with the
modulator RF board MCU at the
specified RF OUT module (1-4).
This problem could be caused by
a loose or broken cable or by the
modulator MCU not being
programmed correctly
1
Reset the QAM device
2
Contact Cisco Services
RF (1-4) DC
Lock detect
error
Lock detect
error
See also RF
(1-4) UC Lock
detect error
(1-4) UC Lock
detect error
Major
Downconverter (DC) lock
detect signal not functioning
correctly. During Modulator
MCU Power On Self Test
(POST), the lock detect signal
from the downconverter
phase-locked loop (PLL) did
not indicate an unlocked
condition when one existed
detect signal not functioning
correctly. During Modulator
MCU Power On Self Test
(POST), the lock detect signal
from the downconverter
phase-locked loop (PLL) did
not indicate an unlocked
condition when one existed
Note: Since the MCU cannot
correctly detect locked or
unlocked status, the RF
Output field displays
“MUTED” when this condition
occurred
correctly detect locked or
unlocked status, the RF
Output field displays
“MUTED” when this condition
occurred
The output converter
synthesizer lock detect
circuitry has malfunctioned
synthesizer lock detect
circuitry has malfunctioned
Contact Cisco Services
RF (1-4) DC
PLL unlocked
PLL unlocked
Major
Downconverter (DC) PLL
synthesizer cannot lock. The
output frequency may not be
correct. The RF Output field
displays “MUTED” when this
condition exists
synthesizer cannot lock. The
output frequency may not be
correct. The RF Output field
displays “MUTED” when this
condition exists
Contact Cisco Services
RF (1-4)
EEPROM
failure
EEPROM
failure
Minor
Modulator EEPROM failure. The
EEPROM on the modulator board
is not present or is not
operational. If this alarm is set,
RF calibration data is not
available and the “RF (1-4) Level
not calibrated” alarm is also active
EEPROM on the modulator board
is not present or is not
operational. If this alarm is set,
RF calibration data is not
available and the “RF (1-4) Level
not calibrated” alarm is also active
Contact Cisco Services