Alarm Categories and Conditions
Instruction Manual: Professional Receivers and Decoders (IRD)
Page D-5
ST.TM.TT1220.1
Alarm Category
Contents
PTS info
starvation
Cannot obtain LipSync
according to PCR/PTS due
to compressed bit buffer
underflow.
A
PTS info
overflow
Cannot obtain LipSync
according to PCR/PTS due
to compressed bit buffer
overflow.
A
PTS resync
Audio artefacts due to
presentation adjustments.
W
D.3.3
VBI Output Alarms
The VBI output alarms relate to errors occurring in the decoding and
embedding of VBI information into the outgoing video.
Table D.5: VBI Alarm Categories and Conditions
Alarm Category
Contents
Alarm
Description
Remedy
Default
TTX Err
Error in Teletext data.
Improve signal
quality.
W
TTX overflw.
Teletext buffer overflow.
The decoder cannot
handle the rate of
incoming Teletext
data.
A
TTX no data
No Teletext data available
Change the source,
or ignore.
A
SUBT err
Error in subtitling data
Improve signal
quality.
W
SUBT no
data
No subtitling data available
Change the source.
A
WSS no data
No WSS data available.
Make sure WSS is
sent, or ignore.
A
WSS err
Error in WSS data
Improve signal
quality.
W
VPS no data
No VPS data available
Make sure VPS is
sent, or ignore.
A
VBI output:
VPS err
Error in VPS data
Improve signal
quality.
W
D.3.4
Data Output Alarms
The data output alarms reflect the status of the LS data (RS-232) output
port, and its associated functions.
