Cisco GoQAM Installation And Operation Manual page 155

LCD
Description
RF (1-2)
Comm.
Failure
(RF GoQAM
only)
RF (1-2) DC
Lock detect
error.
See also
RF (1-2) UC
Lock detect
error.
(RF GoQAM
only)
RF (1-2) DC
PLL unlocked
(RF GoQAM
only)
RF (1-2
EEPROM
failure
(RF GoQAM
only)
RF (1-2)
Exceeded max
temp
(RF GoQAM
only)
4004834 Rev D
Alarm Probable Cause
Level
Major The digital I/O board is not able to
communicate with the modulator RF
board MCU at the specified RF OUT
module (1-2). This problem could be
caused by a loose or broken cable or by
the modulator MCU not being
programmed correctly
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
Note: Since the MCU cannot correctly
detect locked or unlocked status, the
RF Output field displays "MUTED"
when this condition exists
The output converter synthesizer lock

detect circuitry has malfunctioned
Major The downconverter (DC) PLL synthesizer
cannot lock. The output frequency may
not be correct. The RF Output field
displays "MUTED" when this condition
exists
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 be
available, and the "RF (1-4) Level not
calibrated" alarm is also active
Minor The internal temperature of the GoQAM
is more than 70ºC (158ºF)
Troubleshooting Alarm Messages
Check and Correct
Reset the GoQAM

Contact Cisco Services

Contact Cisco Services
Contact Cisco Services
Contact Cisco Services
Remove vent

obstructions
Provide more cooling

and ventilation
Check the

temperature-sensing
hardware
Check the exhaust fans

Contact Cisco Services

139