Specifications

MILSTD-1472E
5.15.2.4,3 Repn
rammable or inactive default functions. When keys with labeled default
functions are reprogrammed or turned off, a visual warning shall alert the user that the standard
function is not cumently accessible via that key.
5.15 .2.4.4 Relabeling. Provision shall be made for easily relabeling variable function keys.
Labels for variable function keys, located along the perimeter of a display, maybe generated on the
display face.
5.15 .2.4.5 Shifted characters. Shift keys should not be required to operate variable function
keys.
5.15 .2.4.6 EasYreturn to base-level functions, Where the t%nctionsassigned to a set of
function keys change as a result of user selection, the user should be given an easy means to return to
the initial, base-level functions. For example, in cakpit design, where multifunction keys maybe
used for various purposes such as navigation or weapons cmtrol, the aircrew should be able to take a
single action
to restore those keys quickly to their basic flight control functions.
5.15.2.5 I&htpen.
5.15.2.5.1 ~. A lightpm may be used when nonakical, imprecise input functions are
required. Such direct-pointing controls should be used when item selection is the primary type of data
entry.
5.15 .2.5.2 Dimensions and mounting. See 5.4.3.2.7.3.
5.15 .2.5.3 Actuation. Lightpens shall be equipped
with a discrete actuating/deactuating
mechanism. Push-tip switch actuation fome should be 0.5N - 1.4N (2-5 OZ).
5.15.2.5.4 Feedback Two forms of feedback sbali be provided to the user
a.
b.
5.
Position of the iightpen, preferably in the form of displayed cursor (e.g., circle, crosshair) or
M@*gwM*ti- tiuH*timh~gti~ofti
lightpen. W~sM&lwge_ bb~Mtipktofti tigh@n.
Actuation of the lightpea and receipt of the
input by the system.
15.2.6 Directional controllers.
5.15,2.6.1 &. A joystick, tw%ball or similar device may be used when precise input
functions am required.
Joystick, trackba!ls, grid-and-styius devices and x-y
contdem shall OoRform
to 5.4.3.2.2, 5.4.3.2.3, 5.4.3.2.4, 5,4,3.2.5, and 5.4.3.2.6.
5.15.2.6.2
AawtionJ&acmation. A chcrete ndmnism
shall be prvvided to alAowthe
user to
actuateMeactuate the device,
5.15.2.7 Touch semen. See paragraph 5,4.6 for information on tcmch screens.
5.15.3 Data display.
5.15.3.1 DiSpla’yformzt,
5. 15.3.1.1 Consistency.
Display formats shodd be consistent within a system.
:IPINI
yviiit (’ for t]wri, the s;imc fwm;~t should be used for input and output. Data entrv
When
formats should
n;~tch-the source document formats. Esscnlial dam tex~ and formats should be under computer, not
Ihcr. comrol.
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