HD9690 Series HDTV Graticule Generator Manual
Page 4-20
Revision 1.5
DESKTOP CONTROL PANEL OPERATION
4.8.
CONTROLLING THE ELLIPSE OBJECT
4.8.1. Turning the Ellipse Object On and Off
To select the
ellipse
object press the
ELLIPSE
button. The
ellipse
object will blink momentarily (if the
ellipse
is On and the
obj blink
item on the
setup
menu is enabled) and the
ELLIPSE
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
ellipse
object is On or Off. To turn
the
ellipse
On or Off, press the
ELLIPSE
button when it is blinking. The
ellipse
object will be automatically
de-selected after two minutes of inactivity on the front panel or when another object is selected. The
ELLIPSE
button will be illuminated brightly when it is On but not selected. The ellipse line is shaped to
avoid sharp transitions in the video. Line width may be adjusted using the
Line Width a
ttribute. The
locations of the ellipse boundaries shown is the centre of the line.
4.8.2. Controlling the Aspect Ratio of the Ellipse
Auto Aspect ratio Off
1:1
4:3
14:9
16:9
1.67
1.85
2.35
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
ellipse
object to be
centred and its size to follow a
1:1
aspect ratio. (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
ellipse’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. See section 4.3.1 for more information
about
auto aspect ratio
mode. (The on screen display will show the aspect ratio as
user aspect
and the
centering as
not centred
)
4.8.2.1.
Centering the Ellipse on the Raster
When
auto aspect ratio mode
is On the
ellipse
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
ellipse
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
ellipse
, 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
)
4.8.2.2.
Controlling the Ellipse Colour
Press the
COLOUR
button to adjust the
ellipse
colour. The colour of the
elipse
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.
4.8.3. Controlling the Ellipse Size
Press the
SIZE
button, when the
ellipse
its button is blinking, to adjust the
ellipse
size. The size of the
ellipse
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
ellipse
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.