AJA Ki PRO rack Operation Manual page 17

SDI Inputs and Outputs:
Component YPbPr:
Composite NTSC/PAL Output:
Ref Loop:
LTC Timecode Input And
Output:
Ki Pro Rack v4.2
HDMI formats supported:
• 525i 29.97
• 625i 25
• 720p 50, 720p 59.94
• 1080i 25, 1080i 29.97,
• 1080p 23.98, 1080p 24, 1080p 25, 1080p 29.97
NOTE: To maintain regulatory compliance, when attaching any HDMI audio or video accessory to Ki
Pro Rack HDMI, you must use one each of the ferrite beaded HDMI cables, HH-28F-06,
between the input and output ports of the Ki Pro Rack and the HDMI accessory.
Four BNC connectors are provided for two SDI inputs and outputs. The SDI
inputs and outputs support SD-SDI and HD-SDI video and embedded 24-bit
digital audio. If your camera has multiple outputs, look to see if it has SDI, and
use it where possible for the highest quality.
Connect component YPbPr video cables from a VTR, Camera, or other
source to the three YPbPr input BNCs: Y/G, Pb/B and Pr/R. Then connect
the YPbPr Out BNCs to a monitor, or other component device.
Component input video signals are A/D (input) converted (10-bit).
Similarly, component output video signals are D/A converted (10-bit).
Component video signals are higher quality than composite.
NOTE: Although RGB is used less frequently in today's video systems, Ki Pro Rack supports it at
output. Because Ki Pro Rack's (and SMPTE SDI) native format is YPbPr, AJA recommends the
use of YPbPr whenever possible. Although component video monitors often have RGB inputs,
it's better to use YPbPr when the monitor supports it. The YPbPr format provides "headroom"
for "superwhite" and "superblack"—and these video levels will be clipped when transcoding
to RGB. Also, the RGB/YPbPr transcoding involves a level translation that results in
mathematical round-off error.
NOTE: 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. Ki Pro Rack supports three different types of YPbPr:
SMPTE/EBU N10, Betacam (NTSC), and Betacam (NTSC Japan). These three formats differ in
level only.
NOTE: Setting the Ki Pro Rack component input and/or output to "Beta" for HD material results in an
"Invalid Selection" alarm that must be corrected before recordings or other operations may
take place.
One BNC connector (Component Y) supplies composite NTSC or PAL output. Connect the
output BNC to a monitor, or other composite video device. Composite video signals are
D/A (output) converted (10-bit).
Two looping BNCs allow genlock signal input and output connections. If the
genlock output is unused, it must be terminated using a 75-ohm termination cap.
When the output connects to downstream equipment, the last piece of
equipment in the series must be terminated in 75 ohms.
Two BNCs provide connections to the house LTC timecode generator or source.
Connections are high impedance. One BNC is for input and the other for output.
Note: the Ki Pro Rack LTC output does not provide output during EE or recording
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