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Caution and Warning Alerts are Enabled below 1200 ft. 
 Caution and Warning Alerts are Enabled below 1200 ft. 
 
Only NEW Alerts are Inhibited as follows.  Existing Alerts are not removed.
 
On Takeoff, All New Alerts are INHIBITED when airspeed is greater than 100 kts if radio altitude is less than 50 ft AGL.
 On Takeoff, New Caution Alerts are INHIBITED when airspeed is greater than 80 kts if radio altitude is less than 400 ft AGL.
 
 On Takeoff, New Warning Alerts are INHIBITED when airspeed is greater than 100 kts if radio altitude is less than 50 ft AGL.
 
On Approach, All New Alerts are INHIBITED when airspeed is greater than 60 kts if radio altitude is less than 50 ft AGL.
 On Approach, New Caution Alerts are INHIBITED when airspeed is greater than 60 kts if radio altitude is less than 400 ft AGL.
 
 On Approach, New Warning Alerts are INHIBITED when airspeed is greater than 60 kts if radio altitude is less than 50 ft AGL.
 

 
ICON DISPLAY

 
WINDSHEAR ICON WITH SEARCHLIGHTS
The Windshear icon shown on the display represents the location of the event in both range and azimuth.  In this example, the windshear begins 2 miles ahead and 30° to the right of the aircraft.
VISUAL PWS ALERT ANNUNCIATIONS 
Visual Caution and Warning Alerts are annunciated on the Electronic Displays. 
. Caution Visual Alert: Amber “WINDSHEAR” 

. Warning Visual Alert: Red “WINDSHEAR” 

AURAL PWS ALERT ANNUNCIATIONS 
Caution and Warning Alerts are generated by the cockpit audio system.
Caution Aural Alerts may be one of the following (selected at installation): 
. Option 1: “Whoop, Whoop” 

. Option 2: “Monitor Radar Display” 

Warning Aural Alerts are as follows: 
. Take-Off: “Windshear Ahead, Windshear Ahead” 

. Approach: “Go Around, Windshear Ahead” 

PWS SYSTEM FAILURE ANNUNCIATION 
System failures are annunciated on the Electronic Displays.  Examples: NO PWS, PWS INOP, or W/S PRED 
WEATHER ANALYSIS
MANUAL WEATHER MODE
Manual Weather Mode provides a means to assess storm cell height and development by providing selectable altitude slices.  These slices from the 3D memory are corrected for the curvature of the earth, providing a view at a constant MSL altitude level. 
Selecting MAN on the mode selection knob enters the Manual Mode.  Upon initial selection, the altitude slice is set to the current aircraft altitude (nearest 1000 feet).  The altitude (ALT) knob is used to select the desired altitude slice from 0 to 60,000 feet MSL in 1,000 foot intervals.  Turbulence information and Secondary weather information is removed in MAN mode to enhance analysis of weather reflectivity. 

FULL COVERAGE GROUND MAP MODE (MAP)
The RDR-4000 Weather Radar System can be used in Ground Map mode to identify terrain features.  For ground mapping use the following procedure: 
1. System Control: L/R (or NORM) 

2. Mode: MAP 

3. Range: As desired

4. Gain: If necessary, adjust for optimum observation of terrain features.

The purpose of the MAP mode is to aid in identifying prominent terrain features, such as coastlines, lakes, and large built-up urban areas.  MAP mode provides an extended ground map picture by piecing together individual scans and combining them in the memory for display.  Reflectivity data that is considered ground clutter (and removed from the weather views) is the basis for the Ground Map.  Data from the terrain database is not used, providing an independent verification of position.  The Ground Map is generated automatically and simultaneously with weather. 
　
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本文鏈接地址：WX RADAR RDR4000-PILOT GUIDE 氣象雷達 RDR4000飛行員指南(8)