X75HD Installation and Operation Manual 59
Chapter 4: System Installation and Connections
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
SD Aud Delay Output
This BNC connector on the Multi I/O breakout cable provides the
varying width TTL pulse that is a direct output from the selected path’s
SDTV frame synchronizer output. The pulse width is directly
proportional to the frame synchronizer's input-to-output propagation
delay. Some external audio synchronizer devices can use this pulse
signal to auto-synchronize the audio signal to the video.
HD Aud Delay Output
This BNC connector on the Multi I/O breakout cable provides the
varying width TTL pulse that is a direct output from the HDTV frame
synchronizer output. The pulse width is directly proportional to the
frame synchronizer's input-to-output propagation delay. Some external
audio synchronizer devices can use this pulse signal to
auto-synchronize the audio signal to the video.
Video Connections
The following are direct single-link video connections (not via breakout
cables) on the rear of the X75HD.
Digital Video Input
This six-pin IEEE-1394 connector, labeled DV, is used to connect DV
(often referred to as “Firewire”) devices. In addition to carrying DV
video and audio input and output, this port also provides DV device
control, allowing control of the DV device directly from the X75HD.
This connection is active only if the optional DVI I/O module is
installed.
Serial Digital Input
These BNC connectors, labeled SDI1 IN and SDI2 IN, accept serial
digital ITU-R BT.601 video and embedded audio data at a rate of
270 Mb per second. SDI1 has a relay bypass capability to SD1 OUT.
Serial Digital Outputs
These BNC connectors, labeled SDI1 OUT and SDI2 OUT, provide the
processed and synchronized serial digital ITU-R-BT.601 video and
embedded audio at an output rate of 270 Mb per second.
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