Cobalt Digital COMPASS 9374-EMDE Quad-Stream SDI – AES – MADI Embedder_De-embedder - Manual (Page 10)

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9374-Series Cards Functional Description
1-6 9374-SERIES PRODUCT MANUAL 937X-OM (V1.3)
Audio Crosspoint/Processing Description
Note: Descriptions below are specific to the 9374-EMDE quad stream model. Other
models function identically but have less channel capacity and/or
embed/de-embed as described in Table 1-1.
(See Figure 1-1.) The 9374-Series provides a full unrestricted audio
crosspoint that allows channel routing between any channels on up to four
SDI streams, discrete AES-3id, and AES-10 MADI interfaces. The MADI
interface on the 9374-Series cards support a 64-channel payload at the
industry standard 48 kHz sampling rate, and can reliably receive from 1694A
cable runs up to 250m. All SDI embedding and SDI output timing is timed in
common to a selected timing source. Discrete AES-3id inputs which are
asynchronous with input video are accommodated using per-channel Sample
Rate Converters (SRCs).
The 9374-Series audio crosspoint is built around a card internal bus that can
receive from the following inputs:
• 16 channels of de-embedded audio from each SDI program video
stream
• Up to 16 channels (8 pairs) of discrete AES input
• Up to 64 channels of MADI input audio on the MADI input BNC
• Digital silence (mute) setting
• 16 built-in independent tone generators
• (option +LTC only) LTC encoder LTCA thru LTCD
Any of the inputs described above can be cross-routed to any of the following
output destinations:
• 16 channels of embedded audio onto any of the card SDI output
streams
• Up to 16 channels (8 pairs) of discrete AES output
• Up to 64 channels of MADI output audio on the MADI output BNC
Note: Maximum AES-3id capacity is 8 pairs, of which each pair can be user
GUI-selectable as an input or output.
For each of the inputs and outputs described above, a PPM VU meter
representation on the GUI is provided. For each input channel pair is a
selectable instant routing that places the channel pair on the card’s analog
output pair, thereby conveniently providing a confidence monitor for each
channel pair. This stereo analog pair can in turn be routed to an external audio
monitor or powered monitors (the analog output pair is a consumer-level
unbalanced stereo pair.)
Output audio rates are always 48 kHz using timing alignment as selected by
user controls to frame
REF 1 or a selected SDI input stream.