NAVIGATION AND
COMMUNICATION
AIRPLANE
OPERATIONS
MANUAL
2-18-45
Page
22
Code
01
REVISION 38
AOM-145/1114
7 - ANTENNA TILT CONTROL KNOB
− The TILT knob is a rotary control that allows manual control of
the antenna’s tilt angle. Clockwise rotation tilts the beam
upward 0° to +15°. Counter-clockwise rotation tilts beam
downward 0° to –15°. A digital readout of the antenna tilt angle
is displayed on the MFD.
− The range between +5° and -5° is expanded for setting ease.
ALTITUDE COMPENSATED TILT (PULL ACT)
(P-880 Model Only)
− Pulling out the TILT knob activates the auto tilt control, which
automatically readjusts tilt between ± 2° based on changes in
barometric altitude and/or selected range.
8 - RADAR MODES CONTROL KNOB
OFF - Turns off the weather radar.
SBY - Selects the weather radar standby operating mode.
WX - Selects the weather radar detection operating mode.
RCT - Selects the REACT function (P-880 Model only).
GMAP - Selects the weather radar ground mapping operating
mode.
FP - Selects the weather radar flight plan operating mode.
TST - Selects the weather radar test mode.
9 - GAIN CONTROL KNOB
− Allows receiver gain control.
− When pushed in, receiver gain is preset and calibrated. Rotary
function of the GAIN knob is disabled
− When pulled out, sets receiver gain to variable (VAR) mode.
10 - RAIN ECHO ATTENUATION COMPENSATION TECHNIQUE
FUNCTION BUTTON (P-660 Model Only)
− When pressed (momentarily), enables the REACT.
− REACT is always selected in test mode.
− REACT is available in all modes except MAP.
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