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Alarms
5.1 Introduction
There are two Front Panel LEDs that indicate the status of the Multi-Format
Receiver. These are used to indicate abnormal performance of the unit.
5.2 Location of the Alarm and Power 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 POWER 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 Multi-Format Receiver 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 Annex C, Menus, Menu 6):
• No transport stream - This alarm is raised if no valid transport stream is present.
• Video not running - This alarm is raised if no valid video is present.
• Audio 1 not running - This alarm is raised if the first audio is incorrect.
• Audio 2 not running - This alarm is raised if the second audio is incorrect.
LCD display
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POWER LED
ALARM LED
EN/LZT 790 0003/2 R1A
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