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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2
Operating Controls
3-14
9 RADAR
This rotary switch is used to select one of the following functions.
D OFF – This position turns off the radar system.
D STBY (Standby) – This position places the radar system in
standby; a ready state, with the antenna scan stopped, the
transmitter inhibited, and the display memory erased. STBY is
displayed on the EFIS/MFD.
D WX (Weather) – This position selects the weather detection mode.
The system is fully operational and all internal parameters are set
for enroute weather detection.
If WX is selected before the initial RTA warmup period is complete
(approximately 45 to 90 seconds), the WAIT legend is displayed on
the EFIS/MFD. In WAIT mode, the transmitter and antenna scan are
inhibited and the display memory is erased. When the warmup is
complete, the system automatically switches to the WX mode.
The system, in preset gain, is calibrated as described in table 3–4.
Rainfall Rate
in/hr mm/hr
Color
.04–.16 1–4 Green
.16–.47 4–12 Yellow
.47–2 12–50 Red
> 2 >5 0 Magenta
Rainfall Rate Color Coding
Table 3–4
D GMAP (Ground Mapping) – The GMAP position puts the radar
system in the ground mapping mode. The system is fully
operational and all parameters are set to enhance returns from
ground targets.
NOTE: REACT or TGT modes are not selectable in GMAP.
WARNING
WEATHER TYPE TARGETS ARE NOT CALIBRATED WHEN
THE RADAR IS IN THE GMAP MODE. BECAUSE OF THIS, DO NOT
USE THE GMAP MODE FOR WEATHER DETECTION.