4 DIAGNOSTICS

Figure 4-5 Front panel display for in-band diagnostic

Data activity indicator

 

IB diagnostic

Carrier lock indicator

 

indicator

(L = locked, U = unlocked)

The In-Band Status fields are:

 

 

 

 

 

 

 

 

 

 

Field

Description

 

 

 

 

 

 

 

Mode

The values displayed on the OSD are:

 

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 the last 5 seconds

 

 

 

 

 

 

 

NO

Off

 

 

In-band data not detected within the last 5

 

 

 

 

 

seconds

 

 

 

 

Frequency

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 DCH3416 is

 

power cycled or another digital multiplex is tuned. The maximum value displayed

 

is 9999, even if there were more than 9999 errors.

 

 

 

 

 

 

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