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right.
Line Select Keys
Normally, data is entered by using the line select keys to position the
cursor, using the alphanumeric keys to input the desired data, and
then pressing the ENTER key to complete the entry.
Section II
Control & Display
2423sv602 2-3
Change 1
Control Keys
ON/OFF - DIM Key
The ON/OFF-DIM key provides power-up, display dimming, and unit
shutdown functions.
Pressing the ON/OFF-DIM key for initial power-up will energize the
system and initiate self test of the navigation computer. When self
test is initiated, the self-test page will appear. The initialization page
will automatically follow the self-test page if all tests are successfully
completed. If a failure, which would cause the system to be
unusable, occurs, the Initialization page will not appear. Once the
initialization page appears, no other page can be displayed until the
initialization data is accepted.
After the system is turned on, pressing the ON/OFF-DIM key will
cause a control window to be displayed on the right side of the active
page with the options BRIGHT, DIM, CANCEL, DISPLAY and OFF
selectable using the line select keys.
NOTE: The BRIGHT/DIM provides display dimming only and does
not dim the key backlighting. Key backlighting is dimmed
along with aircraft instrument dimming.
BRIGHT - Pressing the line select key for BRIGHT will cause the
display to steadily brighten as the key is held down.
DIM - Pressing the line select key for DIM will cause the display to
steadily dim as the key is held down.
NOTE: If the display is dimmed completely off and other keys are
pressed or the location of the BRIGHT Key can’t be
remembered, press the ON-OFF DIM key twice to restore
display.
CANCEL - Pressing the line select key for CANCEL will cause the
control window to be removed from the active display page.
Section II
Control & Display
2-4 2423sv602
Change 1
DISPLAY - Pressing the line select key for DISPLAY will cause the
display adjustment window to be displayed. The display adjustment
window presents four options (UP, DOWN, CANCEL and VIDEO)
selectable using the line select keys. (Note: VIDEO is only
applicable to certain CDU part numbers.) Selecting UP will cause
the entire display to shift upwards by as much as one-half character
to adjust the parallax for the line select keys. Selecting DOWN will
adjust the display downwards an equal amount. Selecting video will
cause the display to switch to the video source. Pressing any key
while in video mode will cancel video mode. Selecting CANCEL will
return the display to the main
(BRIGHT/DIM/CANCEL/DISPLAY/OFF) window.
OFF - Pressing the line select key for OFF will cause the CONFIRM
OFF window to be displayed. This window has two options
(CONFIRM OFF and CANCEL) selectable using the line select keys.
Selecting CONFIRM OFF will turn the system off. Selecting
CANCEL will return the display to the main
(BRIGHT/DIM/CANCEL/OFFSET/OFF) window.
PREV Key
The PREV (previous) key is used to cycle backward, one page at a
time, through multiple pages of the same mode.
NEXT Key
The NEXT key is used to cycle forward, one page at a time, through
multiple pages of the same mode.
BACK Key
When the cursor is over a data entry field, the BACK key serves as a
delete or backspace key.
± Key
The "State Change Key" (±) is used in conjunction with the alpha
numeric keys to enter data. It changes + to -, N to S, and L to R. It
is also used in strictly alpha fields as a dash or period.
MSG Key
When a system message becomes active, "MSG" will appear on the
far right side of the top line on the display. If the Position Uncertain
message is active, "POS" will be displayed on the far left side of the
top line on the display.
Section II
Control & Display
2423sv602 2-5
Change 1
Pressing the MSG key will cause the MESSAGE page to be
displayed showing the active messages. The current messages
(those messages generated since the page was last accessed) will
be displayed. After the messages are viewed, the display may be
returned to the previous page by selecting the RETURN option on
the MESSAGE page, by pressing the MSG key again, or by pressing
the BACK key. Line select key [5L] will either be blank or display a
UNILINK, or AFIS if the system is so configured. Pressing this key
will access the UniLink or AFIS Menu page.
ENTER Key
The ENTER key is used to store input data. The cursor marks
variable parameters by means of reverse field printing (dark letters
　
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