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theset hreed isplaysb eO FF or subsequentlys electedo ff,
then MFD2 will operate.I fboth strokeg eneratorsin the
remaining DP are in use, an MFD format that is normally
producedb y stroke writing may be generatedin raster.
With the following exception, either DP can perform
any display function: Mission video record is not performed
during backup operation.
2.33.2.3 Data Failure Modes. In addition to the
backup mode, there are other failure modes. Some examples
are as follows.
If the DPs fail to receive pitch and roll data, the
message PITCH/ROLL FAIL will appear on the MFDs
and all pitch/roll-related symbols are removed from the
displays. The symbols are returned if pitch and roll information
is restored.
Ifthe DPs lose communication with the MCS, a manual
reticle will appear on the HUD and the MFDs will
display only the message DP-MC COMM FAIL and
MENUI. The lighted MODE pushbuttons also turn off
with a loss of MCS communication. Should communications
be restored, the DP-MC COMM FAIL message
is removed and the MODE buttons are lighted again. If
the MC performed a cold start or a system reset, default
formats are presented on the displays.
2.33.3 System Operation. The display system requires
115 V, 400 Hz electrical power. DPl , HUD, and
MFDl receive power from ac essential No. 2 bus and
DP2, MFDZ, and MFD3 are on the ac left main bus. All
displays and DPs are electrically protected by circuit
breakers.T here are nop ower switches for the DPs. Each
of the displays has a power switch that is normally
turned off at the conclusion of flight. The HUD power
switch is on the PDCP, and the MFD power switches are
on each MFD as a part of the DAY/AUTO/NIGHT
switch.
NAVAIR 01.Fl4AAD-1
After a short warmup (under 2 minutes), the default
formats appear on the displays. The default formats are
as follows:
1. HUD - TLN basic
2. MFDl - VDI TLN basic
3. MFD2 - OBC basic
4. MFD3 - OWN A/C basic.
If the mission computers are not in communication,
test patterns will appear on all four displays.
Format selection for the HUD is made by use of the
MODE pushbuttons on the PDCP and by the type of
steering selected. MFD format families are selected by
pressing the pushbutton adjacent to a menu legend or by
cursor designation of the legend. Every MFD format
(except repeats) has MENU select as the center pushbutton
on the lower edge of the display. Also appearing
on all formats for immediate selection are SMS to the
let? of MENU and ECM to the right of MENU. Other
selectionsv ary accordingt o format requirementsW. hen
a repeat format (HUD, DD, or TID) is being displayed
on the MFD, no legends are available for format selection.
To change formats from a repeat, press any pushbutton.
This returns MENU1 to the MFD, permitting
other format selections to be made. Cursor designation
of legends cannot be used with repeat displays.
2.33.4 Heads-Up Display. The HUD (Figure 2-85)
provides a combination of real-world cues and flight
direction symbology, projected directly on a combining
glass assembly. The flight information on an optical
combiner is projected in the pilot forward field of view.
The display is focused at infinity, thereby creating the
illusion that the symbols are superimposed on the real
world (and so that visual cues received from outside the
aircrafta re not obscured).T he pilot usually steersb ased
on interpretation of the visually observed real world.
The HUD can be selected to be the primary flight reference
for all flight regimes displaying navigation and
weapon delivery information. The HUD symbol brightness
control is on the HUD; all other HUD controls are
on the PDCP.
2.33.4.1 Pilot DISPLAYS Control Panel. The PDCP
on the pilot right console (Figure 2-86) provides control
of the mode and display presentationo f the HUD, VDI,
ECM, and TCS formats. Display information is dependent
on the mode selected with the A/A, A/G, and TLN
pushbuttons.
2-153 ORIGINAL
NAVAIR 01.Fl4AAD-1
Figure 2-85. Heads-Up Display
2.33.4.2 Cockpit Television Sensor. The CTVS
is an electro-optical system that images symbology present
on the HUD combiner and outside world information
as well. The unit consists of a video sensor head on
the HUD and an electronic unit in the HUD-VIDEO
panel (Figure 2-83). The sensor signal can be fed to the
mission video recorder and can be displayed on the
MFDs. Operation of the CTVS is controlled by the
VIDEO CONTROL switch on the HUD-VIDEO control
panel.
2.33.4.3 HUD-VIDEO Control Panel. Operation
　
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