Gulfstream Aerospace G550, Руководство по эксплуатации

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(2) RANGE rotary knob that selects the radar range on the designated
display windows. The range of both the MAP display and PFD HSI
are set with the knob, however the range setting may be changed
from the knob selected range by using the CCD to designate a
different range on window pull down menus. Although the RANGE
knob has no marked scale detents, the available radar range
settings are as tabulated below:
Scale Indicated on Display Window
Half-Range Ring
Selected Weather Radar Scan Range
5 (nautical miles) 10 nautical miles
10 (nautical miles) 25 nautical miles
25 (nautical miles) 50 nautical miles
50 (nautical miles) 100 nautical miles
100 (nautical miles) 200 nautical miles
150 (nautical miles) 300 nautical miles
(3) TILT knob adjusts the tilt of the antenna. The antenna tilt may be
manually set up or down fifteen degrees (15°). If the TILT knob is
pulled out, the antenna is set to Altitude Compensated Tilt (ACT)
mode enabling the antenna to automatically adjust tilt for aircraft
altitude and selected display range. (Aircraft altitude information is
derived from Air Data Module #2 through the interface with MAU#2.)
While in the ACT mode, tilt may be refined up or down two degrees
(2°) by rotating the extended TILT knob.
(4) GAIN rotary knob adjusts the RTA receiver gain. The knob is
normally pushed in to select the normal calibrated gain setting.
Pulling the knob out allows manual gain adjustment by turning the
knob in order to increase or decrease receiver sensitivity.
(5) BRT knob adjusts the brightness of the radar presentation on the
selected displays.
(6) TGT pushbutton selects the Target Alert feature that monitors for
heavy (red) precipitation beyond the selected display range. If an
area of heavy precipitation lies approximately five to fifty (5 to 50)
miles beyond the selected display range and within seven and one
half degrees (7.5°) of aircraft heading, a red arc is shown on the
display window and the green TGT mode indicator box on the
display changes to amber prompting the flight crew to select a
increased display range.
(7) STAB pushbutton deselects automatic pitch and roll antenna
stabilization. Normally the antenna uses data from Inertial
Reference Units (IRUs) #2 and #3 to compensate for aircraft attitude
changes in order to maintain a radar scan pattern level with the
horizon. If a malfunction occurs, the STAB pushbutton may be used
to establish the antenna in a fixed position.
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS
2A-31-00
Page 53
July 15/04
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