HD9690 Series HDTV Graticule Generator Manual
Page 3-24
Revision 1.5
FRONT PANEL
OPERATION
3.8.
CONTROLLING THE ELLIPSE OBJECT
3.8.1. Turning the Ellipse Object On and Off
To select the
ellipse
object press the
ELLIPSE
button. A dashed line at the edge of the
ellipse
object will
blink momentarily (if the
ellipse
is On and the
obj blink
item on the
Setup
menu is enabled) and the LED
above the
ELLIPSE
button will come on indicating that the
ellipse
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
object Off or On, press the
ON/OFF
button
when the LED is illuminated. 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.
3.8.2. Controlling the Ellipse Modes
When the
ellipse
object is selected, the
MODE
button is used to control its modes, such as aspect ratio,
and whether it is centred or not. Press the
MODE
button until the desired mode item is shown on the front
panel, along with the current setting. To select one of the other choices for that mode item, turn one of the
shaft encoders knobs. When you have chosen the desired setting for the mode item press the
MODE
button again to save the new setting and view the next mode item. Continue pressing the
MODE
key until
you see the message
Mode Select Off
. The shaft encoders revert to controlling the selected
control
for the
ellipse
that is also shown on the
ctrl
line of the OSD.
3.8.2.1.
Controlling the Aspect Ratio of the Ellipse
Aspect ratio
Off
1:1
4:3
14:9
16:9
1.67:1
1.85:1
2.35:1
This item is used to control whether the
ellipse
object shape is constrained to a specific aspect ratio, or
whether its horizontal and vertical dimensions can be independently controlled.
Select
Off
to allow the
ellipse
object's horizontal and vertical dimensions to be independently controlled.
The OSD will show the actual aspect ratio of the
ellipse
on the
user aspect
line.
Select one of the specific aspect ratios to constrain the horizontal and vertical dimensions so that the
aspect ratio of the
ellipse
object is maintained. The OSD will show the specified aspect ratio of the
ellipse
on the
fixed aspect
line.
3.8.2.2.
Centering the Ellipse on the Raster
Centre:
H + V
Off
This item is used to control whether the
ellipse
object is centred on the raster or not. The
centre
item is
only available when the
SETUP
menu item
force centre
is set to
off.
Select
yes
to force the
ellipse
object to be centred on the raster. The OSD will show
centred.
Select
off
to allow the
ellipse
object to be moved off centre. The OSD will show
not centred.
In this
MODE
it is possible to independently position each line on the
ellipse
, or to position and size the whole
ellipse
, depending on the settings of the
aspect ratio MODE item
and what
CTRL SEL
item is chosen.