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4.5.1. Turning the Mask Object On and Off
To select the mask object press the MASK button. The mask object will blink momentarily (if the mask is
On and the obj blink item on the setup menu is enabled) and the MASK button will blink indicating that the
object is selected. The on screen display will be automatically turned on if the OSD TIMER item on the
SETUP menu is not set to Off and will indicate it the mask object is On or Off. To turn the mask On or Off,
press the MASK button when it is blinking. The mask object will be automatically de-selected after two
minutes of inactivity on the front panel or when another object is selected. The MASK button will be
illuminated brightly when it is On but not selected.
4.5.2. Controlling the Aspect Ratio of the Mask
Auto Aspect ratio
Off
The AUTO ASPECT button is used to control the aspect ratio of the mask, the boxes and the ellipse
objects, and whether they are centred or not. The auto aspect ratio mode forces the mask object to be
centred and its size to follow one of the following fixed aspect ratios: 1:1, 4:3(1.33), 14:9 (1.55), 16:9
(1.78), 1.67, 1.85:1, 2.35:1. (The on screen display will show the aspect ratio as fixed aspect and the
centering as centred) When the auto aspect ratio mode is set to Off the mask's dimensions are not
constrained to follow a fixed aspect ratio and the setup menu force centre item determines whether they
will be forced to the centre of the raster. (The on screen display will show the aspect ratio as user aspect
and the centering as not centred) See section 4.3.1 for more information about auto aspect ratio mode.
4.5.2.1.
Centering the Mask on the Raster
When auto aspect ratio mode is On the mask object will always be centred on the raster. (The on screen
display will show the object centering as centred) When auto aspect ratio mode is Off the SETUP menu
item force centre controls whether the mask will be centred or not (see section 4.2.6.) When the force
centre item is Off it is possible to independently position and size the mask, using the SIZE and POS
buttons and turning one of the shaft encoders as outlined in the following sections. (The on screen display
will show the centering as not centred)
4.5.2.2.
Controlling the Mask Colour
Press the COLOUR button to adjust the mask colour. The colour of the mask object can be adjusted in
the range of "0" through "14", in single digit increments, using either shaft encoder. The colours that will
be displayed for each value are shown in Table 4-2.
4.5.3. Controlling the Mask Size
Press the SIZE button, when the mask button is blinking, to adjust the mask size. The size of the mask
can be adjusted in one of three modes, depending on the setting of the Setup menu Force Centre item
and the Auto aspect ratio mode. The remote panel display will show the mask size while the SIZE button
is brightly illuminated. The On screen display will show the mask size as pixels and lines and as a
percentage of its reference aperture. The size adjust function will be deselected after 3 minutes of panel
activity, or when another button is pressed.
DESKTOP CONTROL PANEL OPERATION
HD9690 Series HDTV Graticule Generator Manual
1:1
4:3
14:9
Revision 1.5
16:9
1.67
1.85
2.35
Page 4-15
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