PRIMUSr 880 Digital Weather Radar System
When GMAP is selected, a green GMAP legend is displayed and the color scheme is changed to cyan, yellow, 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, a flashing WAIT legend is displayed. In WAIT mode, the transmitter and antenna scan are inhibited and the memory is erased. When the warmup is complete, the system automatically
switches to the GMAP mode.
WARNING
THE SYSTEM PERFORMS ONLY THE FUNCTIONS OF WEATHER DETECTION OR GROUND MAPPING. IT CANNOT BE RELIED UPON FOR PROXIMITY WARNING OR ANTICOLLISION PROTECTION.
DFSBY - Forced standby is an automatic, nonselectable radar mode. As an installation option, the controllers can be wired to the WOW squat switch. When wired, the RTA is in the forced standby mode when the aircraft is on the ground. In the forced standby mode, the transmitter and antenna scan are both inhibited, the memory is erased, and the amber FSBY legend is displayed in the mode field. When in the forced standby mode, pushing the STAB
button 4 times in 3 seconds, exits the mode.
FSBY mode is a safety feature that inhibits the transmitter on the ground to eliminate the X- band microwave radiation hazard. Refer
to Section 6, Maximum Permissible Exposure Level (MPEL).
NOTE: In dual installations, overriding the forced standby using the TGT button is done on only one controller.
WARNING
FORCED STANDBY MODE MUST BE VERIFIED BY THE OPERATOR TO ENSURE SAFETY FOR GROUND PERSONNEL.
10 GAIN
The GAIN is a single- turn rotary control and push/pull switch that is used to control the receiver gain. When the GAIN switch is pushed, the system enters the preset, calibrated gain mode. Calibrated gain is the normal mode and is used for weather avoidance. In calibrated gain, the rotary portion of the GAIN control does nothing.
When the GAIN switch is pulled out, the system enters the variable gain mode. Variable gain is useful for additional weather analysis and for ground mapping. In WX mode, variable gain can increase receiver sensitivity over the calibrated level to show weak targets or it can be reduced below the calibrated level to eliminate weak returns.
A28- 1146- 102- 00 | Operating Controls |
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