Grass Valley 8920DMX - Manual (Page 7)

8920DMX Instruction Manual 7
8920DMX Video Audio
Demultiplexer
Introduction
The 8920DMX is a Serial Digital (SD) Video/AES3 demultiplexer that
extracts 20- or 24-bit AES/EBU audio streams from the ancillary data space
of component 525 or 625 digital video. The demultiplexer identifies four
audio groups in the ancillary data stream by a unique identification (ID).
Each audio group (G1, G2, G3, or G4) can contain up to two AES/EBU
audio streams of two channels each (four channels total). The 8920DMX
can extract any one of these four groups.
The 8920DMX-110 module includes a BNC to terminal block adapter for
accessing balanced 110
Ω audio outputs.
The 8920DUX module:
• Can be installed in any Gecko 8900TX-V, TF-V or TFN-V video frame
(cannot be installed in a TX-A/TF-A or TFN-A audio frame),
• Is a hot-swappable module (can be removed and replaced in the frame
with power on),
• Stores settings in non-volatile memory (if the power to the module is
cycled, the module will maintain its settings),
• Outputs up to 2 stereo, AES/EBU audio digital streams,
• Handles synchronous 48K AES/EBU streams with selection of internal
or external CRC/UVC generator, and
• Is able to pass or delete the audio group after extraction.