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functionally interchangeable, giving the ability to display desired information on either indicator or to
use either indicator to control the HUD. The left indicator is used primarily for stores status, built in
test status, engine monitor, caution, and advisory displays. The right indicator is normally used for
radar and weapon video displays.
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The DDIs are NVG compatible and display three colors (red, yellow, and green) for stroke
information. A monochrome version of the digital map can be selected on the left DDI. Either DDI can
provide raster generation for the HUD. A description of the various switches and controls on the right
and left DDIs follows.
NOTE
It is possible that a transient condition may cause the displays to
blank or provide an erroneous display on the left or right DDI, or
HUD. The problem may be cleared by manually cycling the power to
the right or left DDI.
2.18.4.3.1 Brightness Selector Knob. Placing this rotary knob to OFF prevents the DDI from
operating. Placing the knob to NIGHT provides a lower brightness control range and no automatic
contrast control. Turning the knob to DAY provides a higher brightness control range.
2.18.4.3.2 BRT Control Knob. This knob varies the intensity of the DDI presentation.
2.18.4.3.3 CONT Control Knob. This knob varies the contrast between symbology and the dark
background on any level of brightness.
2.18.4.3.4 DDI Pushbuttons. There are 20 pushbuttons on each DDI which are used to select the
function and the mode for proper indicator display.
2.18.4.3.5 Menu Formats. There are two MENU formats (figure 2-41), TAC (tactical) and SUPT
(support) through which display selections can be made. The two menu formats can appear on either
DDI, the UFCD, or MPCD.
The TAC MENU is indicated by the word TAC appearing just above the MENU option. The TAC
MENU is selected by actuating the MENU option on any format other than the TAC MENU format.
The SUPT MENU is indicated by the word SUPT appearing just above the MENU option. The SUPT
MENU is selected by actuating the MENU option on the TAC MENU.
The TAC MENU allows selection of weapons, sensors, HUD, and stores formats. The SUPT MENU
allows selection of flight type formats (HSI, ADI, HMD, BIT, CHKLST, ENG, FCS, UFC BU, FUEL,
FPAS, and MUMI).
Some of the options on the MENU formats are conditional and are not always displayed. NFLR,
FLIR, LST, and CAM are listed only if the equipment is communicating with the mission computer.
HARM DSPLY is displayed when HARM is on board and CLC communicating. A/G missile display
(WEDL DSPLY, MAV DSPLY, etc.) is displayed when the MC has determined from the armament
control processor set that a weapon station has been selected which contains one of these weapons.
If the navigation computer (MC1) is not on, only HSI is displayed on the SUPT menu. If the weapon
delivery computer (MC2) is not on, the SUPT menu remains unchanged and the TAC menu does not
display the STORES, FLIR/LST/CAM or NFLR, AWW-13, HARM, or A/G displays. If both mission
computers are off, or not communicating with the display, the DDI, MPCD, and UFCD display only
a flashing STANDBY in the center of the screen.
2.18.4.3.6 Electronic Attitude Display Indicator (EADI). The electronic attitude display indicator is
available for display on the left or right DDI as an alternative to the attitude display on the HUD
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(figure 2-42). The EADI display is selected by selecting the ADI option on the SUPT MENU. The pitch
ladder is displayed in 10° increments. A small circle is displayed on the ball to represent the zenith and
a circle with an inscribed cross is displayed to represent the nadir. A turn indicator which displays FCS
yaw rate is provided below the ball. A standard rate turn (3°/second) is indicated when the lower box
is displaced so that it is under one of the end boxes.
Selecting the INS or STBY options at the bottom of the display determines the source of attitude
information used to generate the display. Upon power-up with WonW, the EADI attitude initializes to
STBY (STBY boxed), thus using the standby attitude reference indicator for attitude source
information. Selecting the INS option (INS boxed) uses attitude information provided by the INS.
Selection of INS or STBY on the EADI does not change the source of attitude data for the HUD.
Airspeed and altitude are displayed in boxes at the top left and right. Altitude source is displayed
to the right of the altitude box and the vertical velocity is displayed above the altitude box. When ILS
is selected the deviation needles are displayed in reference to the waterline symbol. The ILS needles
are yellow when COLOR is selected on the Attack display.
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本文链接地址：
NATOPS Flight Manual 飞行手册 1(99)
