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(low attenuation levels) cause the receiver to reach its maximum gain in a longer time/longer range.
When this maximum gain value is reached, a cyan background field will appear. Any target inside of
the cyan area will appear in magenta colour, indicating maximum severity.
25 25
N
TOC KPHX
KDVT KSRP
4000 4000
FL180
WX/R/T
TGT
SAT
GSPD
−56
TAT
TAS
−40
234
345
30
6
33
3
GF1710_043
ANNUNCIATION
T5.0
GMAP − Selects the ground mapping mode. The auto TILT control is turned down until the desired
amount of terrain is displayed. The colour scheme is changed to cyan (least reflective return), yellow
(moderate return) and magenta (strong return).
100 100
N
TOC KPHX
KDVT KSRP
4000 4000
FL180
GMAP
TGT
SAT
GSPD
−56
TAT
TAS
−40
234
345
30
6
3
GF1710_044
ANNUNCIATION
33
T5.0
FP − Selects the flight plan mode. This clears the screen of radar data so ancillary data can be
displayed, such as navigation displays and lightning data. In the FP mode the radar RTA is put to
standby and the FPLN legend is displayed in the mode field.
TOC KPHX
KDVT KSRP
4000 4000
FL180
FPLN SAT
GSPD
−56
TAT
TAS
−40
234
345
GF1710_045
ANNUNCIATION
NAVIGATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
17−10−27
WX SYSTEM OPERATION (CONT'D)
TST − Selects the test mode. The test position selects a special test pattern, to verify system
operation. When the TEST is complete, the radar enters the FSBY mode.
TEST TOC KPHX
KDVT KSRP
4000 4000
FL180
SAT
GSPD
−56
TAT
TAS
−40
234
345
GF1710_046
ANNUNCIATION
NAVIGATION
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
17−10−28
WX SYSTEM OPERATION (CONT'D)
TILT
The TILT rotary knob is used to manually select the tilt angle of the antenna. Clockwise rotation of
the knob tilts the antenna upward to +15° and counterclockwise
rotation of knob tilts antenna
downward to −15°. When the TILT knob is pulled out (autotilt),
the antenna tilt is automatically
adjusted with regard to selected range and barometric altitude. The tilt control can fine tune the tilt
setting by ± 2°. When in autotilt,
an A symbol will appear following the digital tilt readout.
AUTOTILT
GF1710_048a
4000
KDVT
234
−56
−40
345
TOC KPHX
KSRP
4000
FL180
GMAP
G85%
SAT
GSPD
TAT
TAS
ANNUNCIATION
T5.0 A T5.0
80,000
70,000
60,000
50,000
30,000
20,000
10,000
0
0 25 50 100
CENTER OF RADAR BEAM
ZERO TILT
5.6° 7,400 ft
14,800 ft
29,000 ft
RANGE NAUTICAL MILES
ELEVATION IN FEET
40,000
30,000
20,000
10,000
5,000
0
0 10
CENTER OF RADAR BEAM
ANTENNA ADJUSTED
7,400 ft
5.6°
14,800 ft
RANGE NAUTICAL MILES
ELEVATION IN FEET
20 30 40 50 60 70 80
FOR 2.8° UPTILT
3,000 ft
NAVIGATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
17−10−29
WX SYSTEM OPERATION (CONT'D)
TILT MANAGEMENT
The pilot can use tilt management techniques to minimize ground clutter when viewing weather
targets.
Assume the aircraft is flying over relatively smooth terrain that is equivalent to sea level in altitude.
The pilot must make adjustments for the effects of mountainous terrain.
The following figure helps to visualize the relationship between tilt angle, flight altitude, and
selected range. It shows:
· Distance above and below aircraft altitude that is illuminated by the flatplate
radiator during
level flight with 0° tilt.
· Respective low altitude situation, with the antenna adjusted for 2.8° uptilt.
AUTOTILT
GF1710_048a
4000
KDVT
234
−56
−40
345
TOC KPHX
KSRP
4000
FL180
GMAP
G85%
SAT
GSPD
TAT
TAS
ANNUNCIATION
T5.0 A T5.0
80,000
70,000
60,000
50,000
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