AJA Io4K - Manual (Page 29)

Io XT/4K v10.5r2 www.aja.com 29
Control Screen Settings Default Output—this is where you select what Io XT/4K will output as a default when no
application has control of the board, such as when the Finder is active. Since Io XT/4K can
be controlled by software applications as well as its own control panel, the output can
change dynamically. When you select many video applications, they will grab control of
the Io XT/4K inputs/outputs. These settings determine what happens when an
application that doesn't grab the Io XT/4K inputs/outputs is active.
Default Output Choices and their meanings:
• Input Pass through: this selection directs Io XT/4K to route video from its selected
input through the card for processing and output. When this selection is in effect,
all Primary/Secondary Format selections are available for selection in controlling
the output. This, in effect, makes the Io XT a converter when used in conjunction
with the AJA Control Panel application and your computer. No applications other
than the 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.
NOTE: See “Configuring Quad SDI I/O” on page 48 for using this menu to input UHD/4K formats.
• 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/4K 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/4K to hold and output the last
frame of video from the last application to control Io XT/4K. 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/4K will synchronize program video:
• Freerun: In this mode, Io XT/4K generates sync without an external reference
source
• Ref In: Directs Io XT/4K to use the Ref Video source for sync (usually an analog
black burst video signal)
• Video In: Directs Io XT/4K to use whichever video input source has been selected
in the Inputs screen for sync