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DX-2200

– SD/HD-SDI Text & Graphics Inserter – User Manual

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ZSnnn.d

Set the zoom factor as a percentage from 100.0% to 800.0% with up to one optional
decimal place. The default is 100% (no zoom).
This command only has an effect in the center / zoom control mode. See the ZSF
command.

ZSLXnnnn
ZSLYnnnn

ZSLWnnnn

ZSLHnnnn

Set the zoom window left edge (ZSLX), top edge (ZSLY), width (ZSLW) or height
(ZSLH). Note: This command selects a region of the input source to display, it does not
set the position of the window in the output video.
For each command, nnnn represents the number of pixels.
The DX-2200 automatically restricts the values to a valid range. The zoom window
cannot be less than 32x32 pixels, or extend beyond the edge of the source.
These commands only have an effect when specifying the zoom window coordinates in
pixels. See the ZSW command.

ZSR

Reset the zoom settings to the defaults

4.8.1.9 Graphic Overlay SERIAL Commands

The  Graphic  Overlay  Serial  Commands  support  three  layers  that  can  each  display  up  to  48  user-defined
Graphic  Fields.  Each  Graphic  Field  can  be  configured  to  be  Text,  Rectangle,  Corner  Marker,  or  Target
Marker. The fields can be configured and positioned using the Graphic Overlay Serial Commands below.

Each Layer of the Graphic Overlay utilizes two frame buffers located in memory. One is these frame buffers
(the active buffer) generates a video output that is mixed on top of the input video, while the other buffer (the
spare buffer) is prepared for use.

The  video  output  of  the  layer  is  updated  by  rendering  all  Graphic  Fields  into  the  spare  buffer  using  the
parameters that  have  been set for each Field. The amount of time required to render the text to the spare
buffer  depends  on  the  number  of  pixels  that  must  be  drawn.  Typically,  the  rendering  process  takes  more
than  one  frame  to  complete.  During  this  time,  the  active  buffer  continues  to  provide  the  Graphic  Overlay
video output. After rendering is complete, the DX-2200-TI switches the active and spare buffers. The buffer
that  was  active  before  the  update  becomes  the  new  spare  buffer  and  is  cleared  by  the  unit  to  so  that  it  is
ready for text to be rendered again when the next update occurs. Buffer switching is always performed at the
end of frame.

Many of the Graphic Field commands update the parameters of a Field (for example the visibility, color or
transparency), but do not update the video output. This allows the user to change as many parameters as
required before sending a command to show the updated output.

4.8.1.9.1 A

CTIVE

AYER

The Graphics Overlay of the DX-2200-TI-03 has three layers named

Graphics Layer 1

Graphics Layer 2

and

Graphics Layer 3

. The Graphic Overlay Commands do not include the layer number in the command

syntax. Instead, the commands always operate on the Active Layer. To select the Active Layer, the GLn
command is used where n is the layer number from 1 to 3. The default Active Layer is Graphics Layer 2.

Additionally,

Graphics Layer 1

can also be accessed by the 'S' commands (See Graphic Layer 1 Overlay

SERIAL Commands). These commands always refer to

Graphic Layer 1

regardless of the Active Layer.

4.8.1.9.2 G

RAPHIC

IELDS

Graphic Fields are numbered 1 through 48. The Graphic Overlay Commands that apply to a single field
include the field number in the command, for example, the GnnS command enables display of field
number nn.

For any command that uses a field number, the field can be specified as either a 1 or 2 digit number in the
range 1 through 48.