PRIMUS
r
1000 Integrated Avionics System
A28--1146--112--00
B--3
PRIMUS
â
660 Weather Radar System
2
RCT (RAIN ECHO ATTENUATION COMPENSATION
TECHNIQUE) SWITCH
The RCT switch is a toggle--contact switch that is used to select the
RCT mode. The RCT circuitry compensates for attenuation of the radar
signal as it passes through rainfall. The cyan field indicates areas where
further compensation is not possible. Any target detected within the
cyan field cannot be calibrated and should be considered severe
weather. All targets in the cyan field are displayed as fourth level
precipitation (magenta)
RCT is a submode of the WX mode and selecting RCT forces the
system to preset gain. When RCT is selected, the RCT legend is
displayed on the PFD or MFD.
3
STAB (STABILIZATION)
Pushing the STAB button selects or deselects the stabilization function
that automatically compensates for for aircraft roll and pitch
maneuvers.
4
TGT (TARGET) BUTTON
The TGT button is used to enable and disable the radar target alert
feature. Target alert is selectable in all but the 300 mile range. When
selected, target alert monitors beyond the selected range and 7.5
_
on
each side of the aircraft heading. If a return with certain characteristics
is detected in the monitored area, the target alert changes from the cyan
armed condition to the amber TGT warning condition (refer to table B--1
for target alert characteristics). The target advises the pilot of a
potentially hazardous condition directly in front of and outside the
selected range. When the amber warning is received, the pilot must
select longer ranges to view the target. Note that the target alert is
inactive within the selected range.
Selecting target alert forces the system into preset gain. Target alert
can be selected in the WX RCT and FPLN modes.
