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pilot should select longer ranges to view target alert. When TGT button is selected, TGT
annunciation will replace the GAIN annunciation in the status display.
TGT will be displayed as TGT (flashing), if red
or magenta is detected outside selected range.
Rainfall Rate
RAINFALL COLOUR CODING
in/hr mm/hr
Colour
.04 to .16 1 to 4
.16 to .47 4 to 12
.47 to 2.0 12 to 50
>2 >50 TOC KPHX
KDVT KSRP
4000 4000
FL180
WX
TGT
SAT
GSPD
−56
TAT
TAS
−40
234
345
GF1710_037T5.0
SECT − The normal radar sweep is ± 60° from the airplane nose at a rate of 14 sweeps/min.
Pressing SECT button reduces the angle of sweep to ± 30° at a rate of 28 sweeps/min. Pressing the
SECT button again, returns to normal sweep. Both the pilot’s and copilot’s displays will show the
same sweep angle.
N
50 50
N
50 50
30
6
33
3
30
6
33
3
GF1710_038
120° arc 60° arc
GAIN − The GAIN knob is a rotary control and push/pull switch that is used to control the receiver
gain. Push on the GAIN switch to enable the preset calibrated gain mode. Calibrated gain is the
normal mode and is used for weather avoidance. Pull out on the GAIN switch to enable the variable
gain mode. Variable gain is used to provide additional weather analysis and for ground mapping. In
WX mode, variable gain receiver sensitivity can be increased to show weak targets or can be
reduced to eliminate weak returns.
ANNUNCIATION
TOC KPHX
KDVT KSRP
4000 4000
FL180
WX
G85%
SAT
GSPD
−56
TAT
TAS
−40
234
345
GF1710_039
T5.0
NAVIGATION
Flight Crew Operating Manual REV 41, Jul 08, 2004
CSP 700−6
Volume 2
17−10−26
WX SYSTEM OPERATION
The RADAR rotary knob is used to select the following functions:
OFF − Turns the radar off. The system is no longer radiating and the antenna is stowed.
TOC KPHX
KDVT KSRP
4000 4000
FL180
SAT
GSPD
−56
TAT
TAS
−40
234
345
WX/OFF
TGT
GF1710_040
ANNUNCIATION
T5.0
SBY − Selects the WX system in standby mode. It takes approximately 45 seconds for the system to
warm up after being switched out of OFF. There is also a hidden mode, Forced Standby (FSBY).
This mode is enabled automatically on the ground, if the airplane is powered up, with the radar
powered. To exit FSBY, push STAB button 4 times within 3 seconds. This mode prevents the radar
from radiating, thereby protecting the ground personnel from radiation exposure.
STBY
TGT
FSBY
TOC KPHX
KDVT KSRP
4000 4000
FL180
SAT
GSPD
−56
TAT
TAS
−40
234
345
GF1710_041
ANNUNCIATION
T5.0
WX − Selects the WX mode of operation. When WX is selected, airplane inflight, the system is fully
operational and all parameters are set for enroute weather detection. If the rotary knob is moved
directly from OFF to WX, the system will first go into SBY for approximately 45 seconds, then
become active.
TOC KPHX
KDVT KSRP
4000 4000
FL180
WX
T5.0
TGT
SAT
GSPD
−56
TAT
TAS
−40
234
345
GF1710_042
ANNUNCIATION
NAVIGATION
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
17−10−27
WX SYSTEM OPERATION (CONT'D)
RCT − Enables the Rain Attenuation Compensation Technique (REACT). The REACT compensates
for attenuation of the radar signal as it passes through rainfall. Strong targets (high attenuation
levels) cause the receiver to reach its maximum gain value in a short time/short range. Weak targets
(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
　
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