Cisco DNCS System Release 2.7 3.7 4.2 デザインガイド
Second Tuner Status Diagnostic Screen
78-4001708-01 Rev B
69
Second QAM
The following table provides a description of the current status of the QAM. For
The following table provides a description of the current status of the QAM. For
more information, go to Current QAM Parameters in the RF Status Diagnostic
Screen (on page 29).
Important! The only way to verify which tuner is tied to an output is to change
Important! The only way to verify which tuner is tied to an output is to change
channels on that output (Main or PIP), and observe the frequency and modulation
changes that occur in the RF Status Diagnostic Screen (on page 29) and the Second
Tuner Status Diagnostic Screen (on page 67).
Field Name
Description
Possible Values
Status
The status of the second QAM
Locked—receiver is locked onto a
valid analog or QAM channel
valid analog or QAM channel
Unlocked—valid data is not being
received
received
S/N
The approximate signal-to-noise
ratio (dB)
ratio (dB)
[Integer > 0]
n/a
EQ Gain
The QAM equalizer gain on the
QAM data channel
QAM data channel
Amber—marginal signal problem
that needs corrected
that needs corrected
Red—serious signal problem
exists and needs corrected
exists and needs corrected
White—no signal problems exist
Seconds
The number of seconds the
tuner has been locked on current
frequency
tuner has been locked on current
frequency
[Integer > 0]
Freq
The frequency to which the
inband tuner is tuned (MHz)
inband tuner is tuned (MHz)
[Dependent upon tuned
frequency]
frequency]
Tuning Mode The tuning mode of the inband
tuner
Analog
QAM-64
QAM-128
QAM-256
Level
7
The approximate signal level
Amber—level is marginally too
high or too low
high or too low
Red—level is too high or too low
White—level is normal
Corr Bytes
7
The number of bites received in
error that were successfully
corrected by the FEC code
error that were successfully
corrected by the FEC code
[Integer > 0]
7
The level and signal-to-noise data is provided for your convenience. These measurement
results are not a substitute for measurements taken with signal level meters or spectrum
analyzers.
8
This field applies to QAM Data Channels only. It does not apply to analog channels.