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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2
Operating Controls
3-6
D ON – Places the system in the operational mode selected by the WX
or MAP (GMP) button. When WX is selected, the system is fully
operational and all internal parameters are set for enroute weather
detection. The alphanumerics are white and WX is shown in the
mode field.
If ON is selected before the initial RTA warmup period is over
(approximately 90 seconds), the white WAIT legend is displayed
in the mode field. 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 (or MAP)
mode, as selected.
The system, in preset gain, with WX selected, is calibrated as listed
in table 3–2.
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 3–2
D FP (Flight Plan) – The FP position puts the radar system in the flight
plan mode, that clears the screen of radar data so ancillary data can
be displayed. Examples of this data are:
- Electronic checklists
- Navigation displays
- Electrical discharge (lightning) data.
NOTE: In the FP mode, the radar RTA is put in standby, the
alphanumerics are changed to cyan, and the FLTPLN
(flight plan) legend is shown in the mode field.