Honeywell PRIMUS 1000 Pilot's Manual page 266

Integrated avionics system for the citation encore
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R
PRIMUS
1000 Integrated Avionics System
D
TEST – The TEST position selects the radar test mode. A special
test pattern is displayed to verify system operation.
displayed in the MFD mode field.
IF THE AIRCRAFT IS ON THE GROUND AND FORCED STANDBY
IS OVERRIDDEN, THE TRANSMITTER IS ON AND RADIATING
X–BAND MICROWAVE ENERGY IN THE TEST MODE. REFER TO
MAXIMUM PERMISSIBLE EXPOSURE LEVEL (MPEL) IN THIS
APPENDIX.
9
GAIN KNOB
The GAIN knob is a rotary control and push/pull switch that controls 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 function of
the GAIN control is disabled.
When the GAIN switch is pulled, the system enters the variable gain
mode. Variable gain is used for additional weather analysis and for
ground mapping. 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.
HAZARDOUS TARGETS ARE ELIMINATED FROM THE DISPLAY
WITH LOW SETTINGS OF VARIABLE GAIN.
In the GMAP mode, variable gain is used to reduce the level of strong
returns from ground targets.
Minimum gain is set with the knob at its fully counterclockwise position.
Gain increases as the knob is rotated in a clockwise direction to the 12
o'clock position. At the 12 o'clock position, both the gain and sensitivity
time control (STC) are at their maximum values. Additional clockwise
rotation removes the STC. At the full clockwise position, the gain is at
maximum and the STC is at minimum.
STC reduces the receiver gain at the start of the trace, and then
increases it as the more distant returns are received. With STC, a
uniform display of cell strength is displayed for both near and distant
cells.
PRIMUSr 660 Weather Radar System
A–8
WARNING
WARNING
TEST
is
A28–1146–134
REV 1 Jan/03

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