PROMOTION TECHNICAL REFERENCE MANUAL
Document 15774(1.0.0.0)
21
Setting the Contrast Midpoint
The contrast midpoint enables you to optimize the display contrast for various
environmental conditions that can affect character brightness based on a range of values
where 00 is the lightest setting and 99 is the darkest. The contrast midpoint is also the MID
value for the View Angle Parameter setting, where it is the midpoint of eight lighter and
eight darker settings.
To set the contrast midpoint:
1.
Load the factory default values described previously. The ADJUST CONTRAST
MIDPOINT screen appears and displays the current midpoint value.
2.
To increment the reference value by three, press
F2
.
3.
To decrement the reference value by three, press
F3
.
4.
To save any changes, press
F1
.
5.
After setting contrast midpoint, the ProMotion will then perform a self-test.
Restricting Access
If needed, you can prevent access to the Parameter menu and disable the following Escape
commands: Set All Parameters (
Esc [1z
), Set and Save All Parameters (
Esc [2z
), Set All
Defaults (
Esc [3z
) and Program Function Keys
(Esc [5z
).
To restrict access to the Parameter menu and disable related Escape commands:
1.
Remove power from the ProMotion.
2.
For 45 or 30-key ProMotions, simultaneously hold
CTRL
,
SHIFT
and
F3,
and reapply
power.
3.
For 20-key ProMotions, simultaneously hold
BKSP
,
ENTER
and
F3,
and reapply
power.
In either case, the ProMotion will save the change and then perform a self-test
To re-enable access to the Parameter menu and related Escape commands after restricting
access, simply repeat the above procedure.
