SECTION 2: SIMPLIFIED OPERATING PROCEDURES 
ON/OFF
There is no traditional OFF switch on the RDR-4000 control panel.  The radar is always scanning while in flight so that the most current weather information is instantly available in the 3D memory.
The Radar is OFF (Not Transmitting) when:
. The System Control knob on the Radar control panel is set to TEST while the aircraft is on the ground and the PWS Qualifiers are not satisfied.  (See AUTOMATIC WINDSHEAR ACTIVATION on page 14.)

. Or WXR is deselected on both Electronic Flight Display control panels while the aircraft is on the ground and the PWS Qualifiers are not satisfied.  (See AUTOMATIC WINDSHEAR ACTIVATION on page 14.) 

The Radar is ON (Transmitting) when:
. The System Control knob on the Radar control panel is set to L or R (dual system) or NORM (single system) and WXR is selected on at least one Electronic Flight Display control panel while the aircraft is on the ground.

. Or the PWS Qualifiers are satisfied while the aircraft is on the ground.  (See AUTOMATIC WINDSHEAR ACTIVATION on page 14.)

. Or the aircraft is in the air, regardless of any other settings.  

Radar data is shown on the display when:
. WXR is selected on the Electronic Flight Display control panel and TEST is NOT selected on the Radar control panel.

. Or there is a PWS Alert.  (See WINDSHEAR ALERT REGIONS on page 14.) 

TEST 
. System Control: TEST 

. Mode: AUTO 

. Gain: CAL 

. Range: 10 to 320 nm 

. Select WXR on the Electronic Flight Display control panel. 

. Note the test pattern on the display and observe the sequence shown below. 

Test Sequence
Time 
TEST Selected
 Approx.2 Sec.
 Approx.
4 Sec. 
 Approx. 
6 Sec.
 
PWS FAIL/INOP
 On
 OFF (“ON” if failure is detected)
 
PWS VISUAL ALERTS
 Off
 Amber
(WINDSHEAR)
 Red 
(WINDSHEAR)
 
PWS AURAL ALERTS
 None
 Tone “Whoop, Whoop” 
 or "Monitor Radar Display” 
 “Go Around, Windshear Ahead, … Windshear Ahead, Windshear Ahead” 
 
DISPLAY
 Normal Test Pattern (No PWS Icon)
 

“Whoop, Whoop” or “Monitor Radar Display” is selected at installation.
 
. Check for weather related fault messages on the display. 

. For a complete radar system test, leave it in TEST for at least 50 seconds.

. For a dual system select TEST on the other system and repeat. 

. During test mode there is no radiation hazard to personnel in the vicinity of the aircraft.

. Leave the system in TEST mode until it is safe to operate the radar.  When safe to do so select NORM or L/R.  

TAKEOFF AND DEPARTURE 
. System Control: L or R (dual system) or NORM (single system)

. Mode: AUTO 

. Gain: CAL or as required to assess threats.  (Refer to GAIN CONTROL on page 23 for more details.)

. Range: Pilot Flying – 10 to 40 nm, other side at least one range higher. 

. Avoid any magenta turbulence cells and monitor the display for weather intensity to avoid any weather threats. 

. If there is weather in the area, ensure that the radar has been turned on in time to allow pilot(s) to evaluate any threats prior to takeoff.

CLIMB UP TO FL200 
. System Control: L or R (dual system) or NORM (single system)

. Mode: AUTO 

. Gain: CAL or as required to assess threats.  (Refer to GAIN CONTROL on page 23 for more details.)
　
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