Cisco Cisco Explorer Set-top Software Version 2.3 Betriebsanweisung
Chapter 2 Network Status Diagnostic Screens for all Explorer DHCTs
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749244 Rev G
Current QAM
Important: On the Explorer 8000, 8000HD, 8300, or 8300HD Home Entertainment
Important: On the Explorer 8000, 8000HD, 8300, or 8300HD Home Entertainment
Servers, the descriptions in the Current QAM section of the RF Status diagnostic
screen always refer to the first tuner. Also, the information displayed in the Current
QAM descriptions is not necessarily related to what is displayed on the main TV
screen or the PIP. 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 and the Second
Tuner Status diagnostic screen. To view the status of the Second Tuner, go to Second
Tuner Status Diagnostic Screen (on page 133).
Field
Name
Description
Possible Values
Freq
The frequency (Freq) of the tuned
QPSK receiver (MHz)
QPSK receiver (MHz)
[Dependent upon setting]
Tuning
Mode
Mode
The current mode of the inband
tuner
tuner
QAM-64
QAM-128
QAM-256
Analog
The following is a list of conditions
for the possible modes that are
placed after the specific tuner
mode:
• A: inband tuner is in the A
The following is a list of conditions
for the possible modes that are
placed after the specific tuner
mode:
• A: inband tuner is in the A
mode
• B: inband tuner is in the B
mode
•
s: inband tuner is scrambled
Example: QAM-256Bs
Example: QAM-256Bs
Status
The status of the receiver in
regards to receiving valid data
regards to receiving valid data
Locked-—tuner is locked
Unlocked—tuner is not locked
Level
The approximate received signal
level
level
-8 – +8 dBmV (value displayed in
white)—signal level is nominal
white)—signal level is nominal
>+8 or <-8 dBmV (value
displayed in amber)—signal level
is marginally too high or too low
displayed in amber)—signal level
is marginally too high or too low
<Range or >Range (value
displayed in red)—signal level is
unacceptably too high or too low
displayed in red)—signal level is
unacceptably too high or too low
3
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.