PRIMUSr 880 Digital Weather Radar System
Selected Range | Minimum Target | Target Range |
(NM) | Depth (NM) | (NM) |
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5 | 5 | 5- 55 |
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 |
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Target Alert Characteristics
Table 3- 2
4RCT (Rain Echo Attenuation Compensation Technique (REACT))
The RCT switch is an alternate- action switch that enables and disables REACT.
The REACT 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 dangerous. All targets in the cyan field are displayed as fourth level precipitation, magenta.
REACT is available in the WX mode only and selecting REACT forces the system to preset gain. When engaged, the white RCT legend is displayed in the REACT field.
NOTES: 1. REACT’S three main functions (attenuation compensation, cyan field, and forcing targets to magenta) are switched on and off with the RCT switch.
2.Refer to Section 5, Radar Facts, for a description of
REACT.
5 STB (Stabilization)
The STB button toggles pitch and roll stabilization ON and OFF. It is also used with the STB adjust mode and to override forced standby.
The radar antenna is normally attitude stabilized. It automatically compensates for roll and pitch maneuvers (refer to Section 5, Radar Facts, for a description of stabilization). The STB OFF annunciator is displayed on the screen.
A28- 1146- 102- 00 | Operating Controls |
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