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PRIMUS
r
880
Digital
W
eather
Radar
System
A28-1146-102-00
Operating Controls
3-21
Selecting target alert forces the system into preset gain. Target alert
can be selected in the WX and FP modes.
To activate target alert, the target must have the depth and range
characteristics described in table 3-5:
Selected Range
(NM)
Minimum Target
Depth (NM)
Target Range
(NM)
10 5 10-60
25 5 25-75
50 5 50-100
100 5 100-150
200 5 200-250
300 N/A N/A
FP (Flight Plan) 5 5-55
WC-884 Controller Target Alert Characteristics
Table 3-5
3 STB (Stabilization)
The STAB button is a that turns the pitch and roll stabilization ON and
OFF.
This radar is normally attitude stabilized. It automatically compensates
for roll and pitch maneuvers (refer to Section 5, Radar Facts, for a
description of stabilization). The amber STB annunciator appears
on the screen. It is also used withthe STB adjust mode, and to override
forced standby.
4 RCT (Rain Echo Attenuation Compensation Technique)
Selecting RCTforces the system to presetgain. When RCT is selected,
the green REACT legend is displayed in the mode field. 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 withinthe cyanfield
cannot be calibrated and should be considered dangerous. All targets
in the cyan field are displayed as fourth level precipitation, magenta.
NOTE: Refer to Section 5, Radar Facts, for a description of REACT.