SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
B--7
PRIMUS
R
650 Weather Radar System
D FP (Flight Plan) --The FP position puts the radar system in the flight
plan mode. In the flight plan mode, the radar data is cleared from the
display and other data is displayed (i.e., navigation displays,
electrical discharge (lightning) data).
In the flight plan mode, data is displayed alone without any radar
target overlay. The type of data is determined at installation and by
auxiliary equipment selection.
In the flight plan mode, the radar is placed in standby, the
alphanumerics are changed to green, and FLTPLN is displayed in
the mode field. If target alert is selected, the RTA continues to
transmit.
D TST (Test) -- The TST position selects the radar test mode. A test
pattern is displayed to verify system operation. TEST is displayed
in the mode field. For test patterns and fault code descriptions, refer
to the self--test section of this appendix.
WARNING
UNLESS THE SYSTEM IS IN FORCED STANDBY, THE
TRANSMITTER IS ON AND RADIATING X--BAND
MICROWAVE ENERGY IN TEST MODE. REFER TO THE
MAXIMUM PERMISSIBLE EXPOSURE L EVEL (MPEL )
PARAGRAPHS IN THIS APPENDIX, AND FEDERAL AVIATION
ADMINISTRATION (F AA) ADVISORY CIRCULARS, TO PREVENT
POSSIBLE DAMAGE TO THE HUMAN BODY.
10 GAIN Knob
The GAIN knob is a rotary control and push/pull switch that controls the
receiver gain. Push the GAIN knob in to put the system into preset
(calibrated) gain mode. Preset gain is the normal mode of operation and
is recommended for weather avoidance. In preset gain, turning the
GAIN knob does nothing.
Pull the GAIN knob out to put the system into the variable (VAR) gain
mode. Variable gain is useful for additional weather analysis. In the
weather mode, variable gain can increase receiver sensitivity over the
calibrated level to show very weak targets or it can be reduced below
the calibrated level to eliminate weak returns.
WARNING
HAZARDOUS TARGETS ARE ELIMINATED FROM THE DISPLAY
WITH LOW SETTINGS OF VARIABLE GAIN.
Selecting RCT or TGT overrides the variable gain selection and puts
the system into the preset gain mode.
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