Cisco Model D-PCG1000 PowerKEY CAS Gateway Maintenance Manual
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Chapter 4 General Troubleshooting
24
4019476 Rev C
Macroblocking
If a QAM device is causing macroblocking, refer to the list of possible causes and
then complete the check and correct procedure for each possible cause.
Possible Cause(s)
Check and Correct
The QAM device is running the wrong version
of code.
of code.
1
Upgrade to the most recent version of code
2
Make sure you can load code. Go to Unable to
Download Code (on page 28).
Download Code (on page 28).
3
Make sure you can load the correct code. Go
to Device Downloads the Wrong Code
(Wrong config file) (on page 29).
to Device Downloads the Wrong Code
(Wrong config file) (on page 29).
The data rate as defined for the QAM device
sessions is too low, which also means that the
data rate of the ASI input to the QAM device
is too high.
sessions is too low, which also means that the
data rate of the ASI input to the QAM device
is too high.
1
Reduce the amount of incoming data.
2
Reduce the amount of data added to the
stream.
stream.
3
Increase the modulation mode.
4
Verify and correct session rate targets and
threshold values.
threshold values.
Too many sessions are defined for the QAM
device from the DNCS.
device from the DNCS.
Reduce the total number of MPEG programs by
moving or deleting sessions.
moving or deleting sessions.
The satellite link contains data errors.
Contact your signal provider to verify if there are
any problems with their satellite transmissions.
any problems with their satellite transmissions.
The modulation mode is incorrect.
Verify and correct the modulation mode.
A hardware problem occurred.
1
Run the Doctor Report on the DNCS, and
examine the report for any network connectivity
issues or indications of loss of services. See
Running the Doctor Report (on page 3) for
additional details.
examine the report for any network connectivity
issues or indications of loss of services. See
Running the Doctor Report (on page 3) for
additional details.
2
Troubleshoot the network connectivity issues
or indications of loss of services that are
identified in the Doctor Report.
or indications of loss of services that are
identified in the Doctor Report.
3
If the alarm continues to occur, contact Cisco
Services for further assistance.
Services for further assistance.