4 DIAGNOSTICS
33
Figure 4-5 Front panel display for in-band diagnostic
The In-Band Status fields are:
Field Description
Mode The values displayed on the OSD are:
ANALOG — analog (NTSC) channel
64 QAM — 64 QAM digital channel
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 Front Panel Description
YES L Carrier locked
NO U Carrier not locked
PCR Lock Indicates whether the in-band receiver is locked to the current program clock
reference for a digital video service on the specified tuner. If a digital carrier is
not present, it indicates the PCR is 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 Front Panel Description
YES On In-band data detected within last 5 seconds
NO Off In-band data not detected within last 5 seconds
Frequency The analog frequency is displayed as the picture carrier. The In-band
frequency is center RF carrier frequency tuned for the digital service on the
specified tuner. The frequency is displayed in MHz in xxxx.xxx format and
ranges from 54 to 860 MHz.
SNR When carrier lock has been established, displays an estimate of 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
5 Second Error Counts Indicates the number of correctable and uncorrectable digital multiplex errors,
up to 9999. It is updated every 5 seconds and reset each time the DCH6416
is power cycled or another digital multiplex is tuned. The maximum value
displayed is 9999, even if there were more than 9999 errors.
IB diagnostic
indicato
Data activity
indicato
Carrier lock indicator
L = locked
U = unlocked
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