DX-2200
– Dual-view 2x1 SDI Video Switcher
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By default, the overlay position coordinates refer to where the top-left corner of the
overlay is located in the output video. The reference point can be changed to the
center of the overlay instead of the top left corner using the LnPM2 command.
Moving the overlay is very fast because it does not require rendering any Fields or
switching the overlay buffers. The overlay item can be repositioned at the video
frame rate by sending serial commands at an appropriate interval.
Table 17: Layer Control SERIAL Command Codes
Command
Code
Mode of Operation
Layer Control Commands
LnU
Update layer n by rendering all Fields on the layer(s) to the spare buffer, then
switching the spare and active buffers to make the update visible.
n is the layer number(s), See **
After the buffer switch, the new spare buffer is automatically cleared.
LnB
Renders the Text or Graphics Fields on Layer(s) n to the spare buffer, but the
buffers are not swapped. The video output does not change.
n is the layer number(s), See **
LnW
Swap the active and spare buffers on layer n, then clear the new spare buffer.
No fields are rendered and the spare buffer is displayed with its existing
content.
n is the layer number(s), See **
LnS
Swap the active and spare buffers on layer n without rendering and fields or
clearing of any buffers.
n is the layer number(s), See **
LnC
Clear the spare buffer on layer n.
n is a number in the range 0 to 3, See **
LnD
Disable display of layer n. The entire layer is disabled without changing the
settings of any Text or Graphic Fields on that layer. Use LnE to make the layer
visible again.
n is the layer number(s), See **
LnE
Enable display of layer n. If the layer was previously disabled with LnnnD, then
this command makes the layer visible again.
The LnD and LnE commands provide a very fast method of turning an entire
layer on and off.
n is the layer number(s), See **
LnH
Disable layers that are not needed. Note: This command may disturb the output
video.
LnA
Enable a layer that has been previously disabled with LnH. Note: This
command may disturb the output video.
LnT
Toggle the visibility of layer n between on and off.
nnn is the layer number(s), See **
LnZ
Set the size and visibility of layer n to default. The defaults are visible and the
same size as the output video of the DX-2200.
nnn is the layer number(s), See **
LnKxxxx,yyyy
Set a preferred size for an overlay layer. xxxx and yyyy are numbers between 1
and 4 digits in length. The size of an overlay cannot be less than 16 pixels in
either direction. Setting xxxx=0 and/or yyyy=0 uses the default size, which is
the same size as the output video.
nnn is the layer number(s), See **
Summary of Contents for DX-2200-SW-02
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