D 03: In-Band Status - Motorola DCT700 Installation Manual

B-8 Diagnostics

d 03: In-band Status

This diagnostic displays for the last attempted channel tune. If a digital carrier is not present,
the diagnostics indicate the carrier lock is analog. When the carrier lock is analog, all fields for
digital (other than a carrier lock channel) are blank.
IN BAND DIAGNOSTIC
DATA
EMM DATA
CARRIER LOCK
PCR LOCK
SNR
MODULATION MODE
SHORT TERM ERROR COUNT
LONG TERM ERROR COUNT
TUNED FREQ
The In-band Diagnostic fields are:
Field Description
Data Activity Lights when the set-top is receiving data on the in-band channels. The indicator covers all
Indicator packet processors regardless of which stream they are monitoring. The following variables
can display:
Blank
*
EMM Data Lights when the set-top is receiving a message on the EMM stream. The indicator is clear
Indicator when entering this diagnostic. The following variables can display:
Blank
*
Carrier Lock Indicates that the digital in-band receiver is locked to the carrier with the following variables:
YES
NO
Analog
PCR Lock Indicates a program-clock-reference lock with the current digital data stream.
SNR Displays an estimate of the carrier signal-to-noise ratio. The SNR displayed is a measure of
the QAM cluster variance, which is proportional to the SNR.
Analog channels display analog for carrier lock. The SNR displays a number for the
numeric value and blank for the ssss value.
The following variables can display:
Blank
GOOD
FAIR
POOR
Modulation Indicates the modulation mode — QAM 64 or QAM 256
Mode
DCT700 Installation Manual
No data received
Data received
No data received
Data received
Carrier locked
Carrier unlocked
Analog channel
The digital section is still in the initial state. If this occurs, check diagnostic d07.
Good value
Marginal signal level; check the signal
Unusable signal
*
*
YES
YES
36 dB ssss
QAM 64
0000
9999
543.000