Figure 4-5 Led Display For In-Band Diagnostic - Motorola DCT3412 Installation Manual

Figure 4-5
LED display for in-band diagnostic
The In-Band Status fields are:
Field Description
Mode The values displayed on the OSD are:
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
YES
NO
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
YES
NO
SNR When carrier lock has been established, displays an estimate of the carrier signal-to-noise
ratio in dB, with an explanation:
AGC When carrier lock has been established, displays an estimate of the automatic gain
control as a percentage, with an explanation:
5 Second Error Indicates the number of correctable and uncorrectable digital multiplex errors, up to 9999.
Counts
It is updated every 5 seconds and reset each time the DCT3412 is power cycled or
another digital multiplex is tuned. The maximum value displayed is 9999, even if there
were more than 9999 errors.
Data activity indicator
MUTE
IB diagnostic
indicator (L = locked, U = unlocked)
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
GOOD — Good value
FAIR — Marginal signal level; check the signal
POOR — Unusable signal
INVALID — Invalid AGC value
P
MUTE
Carrier lock indicator
Diagnostics 4-7
DCT3412 Installation Manual