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PRIMUS
r
880
Digital
W
eather
Radar
System
A28-1146-102-00
Operating Controls
3-6
WARNING
FORCED STANDBY MODE MUST BE VERIFIEDBY THE OPERATOR
TO ENSURE SAFETY FOR GROUND PERSONNEL.
3 TGT (Target)
The TGT button is an alternate-action switch that enables and
disables the radar target alert feature. Target alert is selectable in allbut
the 300-mile range. When selected, target alert monitors beyond the
selected rangeand 7.5° on each side of the aircraft heading.If a return
with target alert characteristics is detected in the monitored area, the
target alert legend changes from the green T armed condition to the
yellow TGT warning condition. (See the target alert characteristics in
table 3-2for a target description.) These annunciations advise the pilot
of potentially hazardous targets directly in front of the aircraft that are
outside the selected range. When a yellow warning is received, the pilot
should select longer ranges to view the questionable target. (Note that
target alert is inactive within the selected range.)
Selecting target alert forces the system to preset gain. Target alert can
be selected only in the WX or FP modes.
NOTE: In order to activate the target alert warning, the target must
have the depth and range characteristics described in table
3-2.