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Figure 3-5
LED display for in-band diagnostic
The In-Band Status fields are:
Field
Description
The values displayed on the OSD are:
Mode
Indicates whether the in-band receiver is locked to the carrier. If a
Carrier
digital carrier is not present, it indicates the carrier is not locked:
Lock
OSD
YES
NO
Indicates whether data is being carried on the in-band stream.
Data
The indicators cover all packet processors, regardless of the
stream they are monitoring:
OSD
YES
NO
When carrier lock has been established, displays an estimate of
SNR
the carrier signal-to-noise ratio in dB, with an explanation:
Data activity indicator
MUTE
IB diagnostic
indicator
64 QAM — 64 QAM digital channel
256 QAM — 256 QAM digital channel
LED
Description
L
Carrier locked
U
Carrier not locked
LED
Description
On
In-band data detected within last 5 seconds
Off
In-band data not detected within last 5 seconds
GOOD — Good value
FAIR — Marginal signal level; check the signal
POOR — Unusable signal
INVALID — Invalid SNR value
DCT3080 Installation Manual
P
MUTE
Carrier lock indicator
(L = locked, U = unlocked)
49
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