MICROTRONIX DX-2200-SW-02, User Manual

Page: 58 / 87

DX-2200
– Dual-view 2x1 SDI Video Switcher
Page 58 of 87
V
ISIBILITY OF
L
AYERS
The Graphic Overlay can be enabled and disabled at the mixer. This provides a
high speed method of turning the overlay on and off because the individual fields
don’t need to be rendered.
The LnD command disables the visibility of a layer, and the LnE command
enables visibility. The LnT command toggles visibility on and off.
These visibility commands act as a master control to enable or disable the entire
layer. The visibility settings of the individual Fields on the layer are not changed by
these commands. By default, all layers are enabled.
NOTE: If these commands are used to disable the overlay, then the visibility commands
for the individual Fields cannot make them visible again. Only the LnE command
or resetting the layer to defaults can make them visible
E
NABLING AND
D
ISABLING
L
AYERS
If the graphic overlay is not required in an application, it can be disabled using the
LnH command. The graphic overlay can be re-enabled using the LnA command.
These commands are relatively slow and may disturb the output video. They are
recommended for use during initial setup or at times when clean video output is
not required.
R
E
-S
IZING
O
VERLAYS
By default, the graphic overlay is the same size as the video output of the
DX-2200. The LnKxxxx,yyyy command sets a preferred size for the overlay. If the
preferred size is smaller than the video size, the overlay is reduced in size to
match the preferred size. The overlay will never be larger than the output video
size.
When the overlay size is changed, the layer will be disabled momentarily and both
the active and spare frame buffers will be cleared. To see the content of the
overlay after a size change the layer must be updated, for example using the LnU
command.
Setting xxxx and/or yyyy to 0 restores the default overlay size. It is not possible to
set the overlay width or height smaller than 16 pixels.
M
OVING
A
N
O
VERLAY
When the Overlay has been reduced in size, (via the LnKxxxx,yyyy command) it is
then possible to change the x, y position of the overlay item within the boundaries
of the output video. This process can then be used for moving/panning an OSD
target marker around the displayed video.
The LnPxxxx,yyyy sets the x and y position of the overlay. The overlay must
always fit completely within the boundaries of the output video. It is not possible to
have an overlay partially off screen. This is the reason that the overlay must be
reduced in size before the position can be changed. It is also possible to change
only the x position using the LnPXxxxx command, or only the y position using the
LnPYyyyy command.