User's Manual Part 2

Operator Manual
2−68
3748DOC020102 Edition: 14.JAN.2005
• ARPA alarms
ARPA displays alarm messages (see also chapter 2.3.6.4) and artificial symbols
(see ARPA SYMBOLS) visually and acoustically.
− “Dangerous Targets Alarm”
This alarm is triggered as soon as a tracked target exceeds the
set limits for CPA or TCPA (see chapter 2.4.2).
− “Guard Zone Alarm”
This alarm is triggered as soon as an untracked target enters an
acquisition / guard zone.
− “Target Lost”
This alarm indicates that the tracked target has been lost.
− “Target Overflow”
This alarm is triggered if more than 70 targets have been acquired. This
situation can be resolved by deleting acquired targets that are of no interest.
• ARPA symbols
When using the ARPA function, the radar video displays various artificial
symbols that describe the following situations.