AJA io XT, Installation And Operation Manual, Page: 15 / 66

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Io XT Installation and Operation Manual — Cable Connections
RS422 Machine Control
A female DE-9 connector on Io XT provides connection for VTRs, camcorders, disk
media servers, and other devices using RS422 SMPTE (Sony) protocol. (Connector
pinout is listed in Appendix A: Specifications.)
Component Video Output (with Composite and Y/C functions)
Io XT features a group of 3 BNC connectors for output of component, composite and
Y/C functions. The signals are labelled on the BNC connectors on the rear panel of Io XT.
A Note About YPbPr —Component Video, or YPbPr, has been given several names
over time. YUV, Y/R-Y/B-Y, and YCbCr, are just some examples. Although these
various formats have some differences in levels, they are all basically the same. Io
XT uses the modern YPbPr terminology exclusively. Io XT supports three different
types of YPbPr: SMPTE/EBU N10, Betacam (NTSC), and Betacam (NTSC Japan).
These three formats differ in level only and are configured in the Mac System via
the Io XT Control Panel.
Reference Video and LTC Input
Two BNC connectors on Io XT provide reference Input and Output. The Reference Video
input can also be used for LTC input. The selection of Reference (sync) or LTC is set using
the Io XT Control Panel.
In Video Pass-through mode, these connectors are effectively loop-through. Supplying
reference signal to the Reference input allows you to synchronize Io XT outputs to your
house analog reference video signal (or black burst). If you have a sync generator or
central piece of video equipment to use for synchronizing other video equipment in
your studio, then connect its analog composite output here. When Io XT outputs video,
it uses this reference signal for locking. When connecting a reference video source, the
locking signal should be the same format as the Primary format selected in the Io XT
Control Panel. It is possible in some circumstances to use an alternate format video
signal as long as the basic frame rate is compatible.
Power
A standard 4-pin male XLR connector provides for 12-Volt DC power to the unit. You
can use either the supplied AC Adapter or furnish your own battery source. Since the
connector is an industry standard pinout, choices are varied and flexible. Many 3rd
party vendors offer products using this standardized power connector.
Pin 1: -
Pin 4: +
Pins 2 and 3: not used
Thunderbolt
Two Thunderbolt connectors are provided for connecting to a Mac that is Thunderbolt-
enabled and for connecting to a Thunderbolt peripheral such as a RAID array or
Thunderbolt display. Please see the System and Software requirements presented
earlier in this Chapter when deciding on the type of Mac to connect.
Caution!
A
lthough the AJA Io XT supports “plug and play” functionality, many
applications do not recognize or operate properly if an input/output device
is removed while they are in use. AJA recommends that if the AJA Io XT is
ever removed while an application is in use, that the application be quit and
then relaunched after the AJA Io XT is reconnected.