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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2 3-15
Operating Controls
As a constant reminder that GMAP is selected, the GMAP legend is
displayed in the mode field, and the color scheme is changed to cyan,
yellow, and magenta. Cyan represents the least reflective return,
yellow is a moderate return, and magenta is a strong return.
If GMAP is selected before the initial RTA warmup period is complete
(approximately 45 to 90 seconds), the white WAIT legend is displayed
in the mode field. In wait mode, the transmitter and antenna scan are
inhibited and the memory is erased. When the warmup period is
complete, the system automatically switches to the GMAP mode.
NOTE: Some installations have controllers that have a WX/GMAP
select switch. In this case, the radar mode switch provides an
ON selection. The separate WX/GMAP switch is used to
select either WX (weather) or GMAP (ground mapping).
D FP (Flight Plan) – The FP position puts the radar system in the flight
plan mode, that clears the screen of radar data. This allows the radar
controller to select a range for display (on EFIS) of mapping
information at very long ranges.
NOTE: In the FP mode, the radar RTA is put in standby, and the
FLTPLN legend is displayed in the mode field.
The target alert mode can be used in the FP mode. With target alert
on and the FP mode selected, the target alert armed annunciation
(green TGT) is displayed. The RTA searches for a hazardous
target from 5 to 55 miles and ±7.5 degrees of dead ahead. No radar
targets are displayed. If a hazardous target is detected, the target
alert armed annunciation switches to the alert annunciation (amber
TGT). This advises the pilot that a hazardous target is in his
flightpath and he should select the WX mode to view it.
NOTE: When displaying checklist, the TGT function is inoperative.
D TST (Test) – The TST position selects the radar test mode. A
special test pattern is displayed to verify system operation. The
TEST legend is displayed in the mode field. Refer to Section 4,
Normal Operation, for a description of the test pattern.
WARNING
IN THE TEST MODE, THE TRANSMITTER IS ON AND RADIATING
X–BAND MICROWAVE ENERGY. REFER TO SECTION 6, MAXI-
MUM PERMISSIBLE EXPOSURE LEVEL (MPEL).