AJA IoXT - Manual (Page 31)

Io XT v10.4 www.aja.com 31
AJA Control Panel need to be open to convert audio and video from one format to
another. For example, if an SD source tape needs to be dubbed to an HD tape, the
signal might be routed from the SD VTR to the Io XT, configured for up-conversion
in the AJA Control Panel and then passed through to the HD VTR for recording.
• Test Pattern: this selection directs Io XT to output a choice of preset pattern when
no other application is using the Io XT. You can choose from:
Black, Color bars (75% or 100%), Ramp, Multiburst, Line Sweep, Multi Pattern, or Flat
Field.
In addition to the preset test pattern choices, a “Load File...” selection at the bottom of the
menu allows you to load any standard RGB graphics file (.tif,.psd, etc.) into the frame
buffer for display.
While in Test Pattern mode, you can select RGB or YUV output via a pulldown menu.
NOTE: The graphic file will not be scaled to fit. If it's smaller than the current frame buffer format, Io
XT will center it in the frame. If it's larger than the current frame buffer format, it will be
cropped on the right and bottom. Also some graphics formats and bit depths may not be
supported. Once a graphic file is loaded into the frame buffer it will be retained until it is
overwritten by another graphic or test pattern, or when power is turned off. Graphic file
names are only “remembered” in the menu as long as the AJA Control Panel application is
running.
Hold Last Application: this selection directs Io XT to hold and output the last frame
of video from the last application to control Io XT. This can be helpful when operating
in an environment where you're switching back and forth between multiple
application windows.
Playback Timing: Use these controls to set Genlock and Timing adjustment.
Genlock (Freerun, Ref In, Video In)—selects how Io XT will synchronize program video:
• Freerun: In this mode, Io XT generates sync without an external reference source
• Ref In: Directs Io XT to use the Ref Video source for sync (usually an analog black
burst video signal)
• Video In: Directs Io XT to use whichever video input source has been selected in
the Inputs screen for sync
Timing (Horiz and Vert)—these two pull-downs allow output timing adjustment with
reference to the Ref Video source selected. The Horizontal reference can be adjusted
by selecting a number of pixels (clocks) to offset. Vertical can be adjusted by
specifying a number of lines to offset.