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APPENDIX E
ALARMS
The alarms are fast and reliable reporting mechanism in case of change in pre-defined parameters. Below you will find an explanation of the types of event
that might trigger an alarm, the settings that should be applied and their properties.
Type of event
Enable
Trigger
&
Release
Thresholds
Description
NOTE
UECP data port timeout
YES
NO
NO
There are NO valid UECP messages for the time
determined by UECP port timeout parameter.
Applicable for all UECP ports (1-7).
RDS loss
YES
YES
NO
Loss of the RDS at the output of the encoder.
Will be also triggered when the RDS
signal is stopped, or when the level is
manually set to 0mV by the user.
High BER
YES
YES
NO
Presence of BER in the RDS signal
If the device is operating normally, this
alarm will not be triggered.
Pilot synchronization loss
YES
YES
NO
Loss of synchronization with the external pilot tone
RDS group loss
NO
YES
NO
Loss (absence) of a specific RDS group/s in the
RDS data stream for a pre-defined time
There is an ‘Enable flag’ for each of
the RDS Group types
DSN change
YES
NO
NO
Change of the current DSN
PSN change
YES
NO
NO
Change of the main PSN
Temperature
NO
YES
YES
The internal temperature of the equipment is lower
or higher than the specified threshold
High and Low threshold are enabled/
disabled separately
TA timeout
YES
NO
NO
ТА timeout has occurred
NOTE
: The change of DSN and PSN can be a dynamic process, which makes the “Idle” status definition of alarms PSN change and DSN change
impossible. Therefore, in case PSN and/or DSN alarm occurs and is finalized through one of the authorized channels (E-mail, SNMP), the alarm status will
remain OK, and the GPO will not be triggered through these alarms.
Due to the diverse nature of the observed physical alarm events, the alarms cannot be completely unified.