Cisco Headend System Release 2.7 User Guide
Chapter 4 Troubleshooting SDV System Issues
80
4022446 Rev B
Access the following
diagnostic screen.
Evaluate the
following field.
What value do I want
to see?
Page 4
–Statuses and
Network Parameters
Important: If all of these
values are 0 and
macroblocking still exists,
call Cisco Services.
values are 0 and
macroblocking still exists,
call Cisco Services.
MPEG STATS
PEI
PER
SER
RST
A/V Disc
0
—desired value
Note: If all of these values
are 0 and macroblocking still
exists, check the QAM and
the quality of feed coming
out of the QAM.
are 0 and macroblocking still
exists, check the QAM and
the quality of feed coming
out of the QAM.
Page 5
–RF Status
CURRENT QAM
Freq
Tuner
—should be tuned to
correct QAM
Status
—locked (desired
value)
Note: If the status is not
"locked," check the QAM
and the RF signal levels.
"locked," check the QAM
and the RF signal levels.
CURRENT QAM
S/N
QAM-64
—28 dBmV to 34
dBmV desired range
(minimum 25 dBmV)
(minimum 25 dBmV)
QAM-256
—32 dBmV to 34
dBmV desired range
(minimum 39 dBmV)
(minimum 39 dBmV)
Note: If the S/N value is not
within the desired range,
check the QAM and the RF
signal levels.
within the desired range,
check the QAM and the RF
signal levels.
CURRENT QAM
Corr Bytes and Uncor
Blks/Current FDC
Blks/Current FDC
Corr Bytes and Uncor Blks
should be static
should be static
—if the
values are incrementing
rapidly, the QAM could be
sending bad blocks of data.
Check the RF signal levels
coming out of the QAM and
the DHCT connection
rapidly, the QAM could be
sending bad blocks of data.
Check the RF signal levels
coming out of the QAM and
the DHCT connection
CURRENT FDC
Current FDC
FDC frequency
—should
match the frequency on the
QPSK
QPSK
Note: If the FDC frequency
does not match that of the
QPSK or is changing, check
the RF signal levels and the
signal quality coming out of
the QPSK and the DHCT
connection.
does not match that of the
QPSK or is changing, check
the RF signal levels and the
signal quality coming out of
the QPSK and the DHCT
connection.