PRIMUS 880 RADAR CONTROLLER
Figure 3-22
FP
Flight Plan. Provides extended range display of navigational data. No radar
data is presented, the system is put into standby mode.
TST
Activates the self-test mode and displays a test pattern. Transmitter is on
and radiating
.
TRB
Momentary alternate-action push button which enables and disables the
Turbulence Detection mode of operation. TRB mode can only be selected
when WX mode is selected and the selected range is 50 nautical miles or
less. Areas of moderate or greater turbulence are shown in soft white (grey-
white). WX/T is annunciated in the mode field. The radar cannot detect clear
air turbulence. Undetected turbulence may exist within any storm cell.
Selecting the 100, 200, or 300-mile range turns off the turbulence detection.
The“/T” is deleted from the mode annunciation and variable gain is engaged
if it was previously selected. Subsequent selection of ranges of 50 miles or
less will re-engage the turbulence detection.
GAIN
Rotary control used to adjust sensitivity of radar receiver. Receiver gain is
fixed and calibrated in the PRESET position. Selection of REACT (RCT)
overrides the gain control setting causing the receiver gain to be fixed and
calibrated.
RANGE
A two-pushbutton range selection system permits range selection from 5 to
300 nautical miles full scale in the WX mode, or 5 to 1200 nautical miles in
the Flight Plan mode. The UP arrow button selects increasing ranges while
the DOWN arrow selects decreasing ranges. 100- nautical mile range is
presented when system is initially turned on. The last range selected will be
remembered when switching between WX and FP. WX range overrides the
RNG/INC/DEC switch on the MC-800 MFD controller when WX mode is
selected on that controller.
TGT
Alternate action pushbutton enables the target alert function.
SECT
Alternate action pushbutton selects either full azimuth scan angle (120°) or
sector scan (60°). Fourteen looks per minute versus 28 looks per minute.
Cessna Citation XLS - Instrumentation & Avionics
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