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removed.
Gain Function
The GAIN function is used for manual gain control of the radar receiver, and is selectable from the
FUNCTION section of the PFD RADAR menu.
When set to NORM, the gain is preset to a specified value. Each setting from NORM changes the
sensitivity one color level.
Lower gain settings are useful for evaluating intense weather targets, while higher gain settings
are useful for evaluating light precipitation.
Weather Radar Automatic Stabilization
The stabilization feature automatically stabilizes the radar antenna with attitude input data from the
IRS system. This provides a constant antenna scan attitude regardless of the aircraft pitch and roll
attitudes.
If an IRS input failure occurs, the attitude input data is removed from the antenna, however, the
radar system remains operational. On the radar status line, a yellow USTB annunciation flashes
for 5 seconds, then remains displayed.
When USTB is displayed and the tilt angle is changed, the USTB will be replaced by the tilt
annunciation. The tilt annunciation remains displayed for 5 seconds after the tilt setting has
stopped changing, and then reverts to the USTB annunciation.
Lightning Detection System (LDS) (Optional)
The lightning detection system maps electrical discharge activity (lightning) 360 degrees around
the aircraft, to a distance of 100 nautical miles. Three levels of electrical activity intensity are
identified. Level one represents the lowest rate of electrical discharge, and level three the highest.
The system transmits the location of up to 63 thunderstorm cells to the displays. The data set is
updated every two seconds. Electrical discharge activity is presented as thunderbolts on the
display in yellow, red, and magenta, with yellow signifying level one, and magenta signifying level
three activity.
The lightning detection system is selected by the TR/WX button on the display control panel (DCP)
or cursor control panel (CCP).
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−13
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
WEATHER RADAR SYSTEM (CONT'D)
Radar Fault Annunciations
RADAR FAULT ANNUNCIATION DESCRIPTION
WX FAIL
When no radar operating mode is being received by the PFD or
MFD from the RTA, the WX FAIL annunciation flashes for 5
seconds, then remains displayed on the navigation display, and
the radar mode is removed.
WX FAULT
When the weather radar system detects an internal fault, the WX
FAULT annunciation flashes for 5 seconds, and then remains
displayed to replace the Tilt/Stabilization annunciation on the radar
status line 2.
LX FAIL
When the LDS is selected for display and is reporting a fault, the
LX FAIL annunciation flashes for 5 seconds, then remains
displayed on the navigation display, and the lightning icons are
removed.
Overlay Fault Field
The overlay fault field is a single line of text, located above the PFD and MFD navigation
display.
OVERLAY FAULT FIELD DESCRIPTION
RADAR ON The annunciation flashes for 5 seconds, then remains displayed to
indicate that the radar is transmitting on the ground.
RADAR RANGE XXX NM
The annunciation is displayed when the radar range and the
on-side navigation display range differ for more than 5 seconds.
XXX represents the actual range the radar is currently reporting
(i.e. 10, 25, etc.).
TERRAIN AWARENESS WARNING SYSTEM (TAWS)
Description
The TAWS alerts and warns the flight crew when the airplane’s flight path and position, relative to
terrain, requires immediate crew attention and action. TAWS alerts the flight crew when
predetermined thresholds are exceeded using the following modes:
• Mode 1 − Excessive descent rate
• Mode 2 − Excessive terrain closure rate
• Mode 3 − Altitude loss after takeoff or go-around
• Mode 4 − Unsafe terrain clearance when not in a landing configuration
• Mode 5 − Below glideslope deviation alert
• Mode 6 − Callouts
• Mode 7 − Windshear detection and alerting
• Terrain/obstacle awareness alerting and display (TAAD)
• Terrain clearance floor (TCF)
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−14
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (CONT'D)
TAWS Functional Schematic
Figure 17−10−11
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−15
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
TERRAIN AWARENESS WARNING SYSTEM (TAWS) (CONT'D)
　
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