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Alarms
Reference Guide: TT128x High Definition Professional Receiver/Decoder
Page 5-3
ST.RE.E10141.5
5.1 Introduction
There are two Front Panel LEDs that indicate the status of the IRD. These
are used to indicate abnormal performance of the unit.
5.2 Location of the Alarm and Lock LEDs
The red ALARM LED is used to indicate an equipment fault condition, for
example a missing or faulty input signal. It should be off during correct
operation, although it may be lit briefly during power-up.
The green LOCK LED is used to indicate that the equipment is locked to a
transport stream when lit, and indicates correct conditions and correct
system functioning.
Figure 5.1: Front Panel LEDs
5.3 ALARM LED
The IRD supports a summary alarm signal that is active when one or more
of the individual monitored alarm conditions are active. It allows masking
of unwanted alarm conditions so that they do not contribute to the
summary alarm. Configuration of alarms is via the Front Panel and remote
control interfaces. The state of the summary alarm is reflected by the
ALARM LED on the front panel where red represents an alarm, and off
represents no alarm.
This LED provides a high-level indication of an alarm within the unit. The
alarm list depends on the unit model. The unit continuously monitors for
the following alarm conditions during normal operation: (if not masked,
see Menu 6, Annex C, Menus):
• No transport stream
• Video not running
• Audio 1 not running
• Audio 2 not running
• Unit temperature
Alarm LED
Lock LED