TM 55-1520-240-23-10
16-87
HEAD UP DISPLAY
(Continued)
16-87
DISPLAY UNIT (DU)
The DU is the output interface between system and
operator. The DU superimposes aircraft information and
flight data onto the ANVIS image. The DU consisting of
the optical unit (OU) and power supply and calibration
unit (PSCU), is replaced as a complete unit. A L/R eye
selector switch on the PSCU changes the scan direction
for left or right eye viewing. All symbol data for the DU
is generated in the SDC. Display intensity is preset to
low each time the system is powered up. Connector
P1 is part of the aircraft wiring and mates to J1, on the
end of the PSCU. J1 is a quick-release connector for
quick egress from the aircraft by the operator. The DU
is calibrated during production and requires no further
calibration. A focus ring on the OU is used to focus the
display.
AIR DATA TRANSDUCER
The difference between dynamic pressure and static
pressure as measured by the air data transducer
provides both airspeed and barometic altitude output
signals to the HUD signal data converter (SDC). These
signals are processed by the SDC and applied to the
HUD display unit (pilot’s/copilot’s). Power to operate the
air data transducer is supplied by the HUD SDC.
16-330
