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