Cisco Headend System Release 2.7 ユーザーガイド
Chapter 2 System-Specific Diagnostic Screens
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78-4011047-01 Rev D
Screen Fields and Values
The following table describes the fields and possible values that can appear on the
The following table describes the fields and possible values that can appear on the
TV screen when you are reviewing the diagnostic screens. They can be useful for
troubleshooting.
Note: The following table includes the status parameters for both QAM 1 and QAM
2 because the fields, descriptions, and values are similar in definition.
QAM 1 and QAM 2 Parameters
Field Name Description
Possible Values
Status
The status that indicates whether
a QAM is locked or unlocked on a
valid analog or QAM channel
a QAM is locked or unlocked on a
valid analog or QAM channel
Locked—tuner is locked
Unlocked—tuner is not locked
Freq
The frequency (freq) in which the
inband tuner is tuned (MHz)
inband tuner is tuned (MHz)
[Dependent upon setting]
Tuning
Mode
Mode
The current mode of the inband
tuner
tuner
QAM-64
QAM-128
QAM-256
Analog
N/A
N/A
Level
The approximate received signal
level
level
Refer to specific hardware
specifications
• value displayed in white—
specifications
• value displayed in white—
signal level is nominal
• value displayed in amber—
signal level is marginally too
high or too low
high or too low
• value displayed in red—
signal level is unacceptably too
high or too low
high or too low
n/a—not applicable on this DHCT
S/N
The signal to noise ratio
Note: This parameter is only
applicable on QAM data
channels.
applicable on QAM data
channels.
Refer to specific hardware
specifications
• value displayed in white—
specifications
• value displayed in white—
signal level is nominal
• value displayed in amber—
signal level is marginally too
high or too low
high or too low
• value displayed in red—
signal level is unacceptably too
high or too low
high or too low
n/a—not applicable on this DHCT
Seconds
The number of seconds that the
tuner has been locked on the
current frequency
tuner has been locked on the
current frequency
[Integer > 0]