Cisco D9477-1 Installation And Operation Manual page 90

Chapter 5 Troubleshooting the MQAM
LCD
Description
ASI (1-2)
Packets were
dumped.
See also (ASI
(1-2) FIFO
Overflow.
Craft event
change
Front panel
event change
Hardware
error
MPEG
Continuity
error
MPEG
Transport
error
74
Alarm
Probable Cause
Level
Minor A FIFO overflow occurred and packet
data has been lost. This indicates one or
more of the following conditions:
Too many sessions defined from the

DNCS for the MQAM
The data rate as defined from the

DNCS for the MQAM session is too
low, which also means that the data
rate of the ASI input to the MQAM is
too high
Hardware problem

Incorrect modulation mode

Status Someone changed the MQAM setting
from the craft port.
Status Someone changed the MQAM setting
from the front panel.
Major General-purpose hardware error. Suspect
broken hardware.
Minor MPEG continuity error counter. One or
more of the MPEG packets are being
dropped.
Minor MPEG transport error indicator counter.
An error occurred in the header of the
MPEG packet.
Check and Correct
Reduce the data rate of

input to the MQAM
by doing the
following:
– Reducing the
amount of
incoming data
– Reducing the
amount of data
added to the
stream
– Increasing the
MQAM
modulation mode
Run the Doctor Report

to troubleshoot
network connectivity
issues
Contact Cisco Services

No response required.
No response required.
Contact Cisco Services.
Check one or more

upstream devices
connected to the DVB
ASI input ports
Contact Cisco Services

Check one or more

upstream devices
connected to the DVB
ASI input ports
Run the Doctor Report

to troubleshoot
network connectivity
issues
Contact Cisco Services

78-717866-01 Rev D