Setup guide

Chapter 2 Avid DS Hardware Overview
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Signal Flow
The following sections provide an overview of the signal flow during capture and playback.
The Avid DS Nitris software controls the process.
Capture Mode
Capture mode lets you use Avid DS Nitris to capture video and audio from the VTR.
• The video output of the VTR goes through the Avid Nitris DNA to the Nitris Base
board, then to the Nitris Codec board, and from there to the video storage array.
• The video output of the Nitris Base board goes to the graphics board and then to the
workstation monitors, where it is displayed as video-in-a-window.
• The control signal from the serial port goes to the VTR to control device operation (the
supplied RS-232/RS-422 convertor and cable must be connected to the workstation).
• The sync signal from the house sync goes through the Avid Nitris DNA to the Nitris
Base board.
Playback Mode
Playback mode lets you use Avid DS Nitris to record video on the VTR.
• The video stored on the video storage array goes through the Nitris Codec board, the
Nitris Base board, the Avid Nitris DNA, and then goes to the VTR and video monitor.
• The video output of the Avid Nitris Base board goes to the graphics board and then to
the workstation monitors, where it displays as video-in-a-window. It is also sent back to
the Avid Nitris DNA for a Client monitor.
• The control signal from the serial port goes to the VTR to control device operation.
• The sync signal from the house sync goes through the Avid Nitris DNA.
House Sync
Whenever you use more than one video device, you must have video synchronization. If the
devices are not in sync, a monitor will show rolling, tearing, or incorrect colors in the picture
whenever you transfer the video between devices.