Motorola DCT3080 - Manual (Page 55)

DCT3080 Installation Manual
49
Figure 3-5
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
Mode
The values displayed on the OSD are:
ƒ 64 QAM — 64 QAM digital channel
ƒ 256 QAM — 256 QAM digital channel
Carrier
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:
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:
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:
ƒ GOOD — Good value
ƒ FAIR — Marginal signal level; check the signal
ƒ POOR — Unusable signal
ƒ INVALID — Invalid SNR value