Cobalt Digital COMPASS 9085 Loudness Processor - Manual (Page 13)

9085-OM (V4.3) 9085 PRODUCT MANUAL 1-9
Introduction
9085 Functional Description
The router acts as a full audio cross point. Each of the 24 output channels (16
embedded, 16 discrete AES) can receive signal from any one of the 40 (16
embedded, 16 discrete AES, 8 analog) input channels, four internal tone
generators, or several mixer sources. Unused output channels can be mapped
to a “Silence” source. Each output also provides gain adjustment and
selectable polarity inversion.
Output audio rates are always 48 kHz, locked to output video, but discrete
AES inputs can be set to use sample rate converters to align these inputs with
the output timing. (AES must be nominally 48 kHz input; 32, 44.1, 96, and
192 kHz inputs are not compatible with the 9085.) The sample rate converters
are disabled by default. Output AES is always precisely synchronized with
the output video. The balanced analog audio input is sampled at 48 kHz with a
+24 dBu clipping level (+24 dBu => 0 dBFS).
As set with the default settings, the routing between embedded audio channels
Embed Ch 1 thru Embed Ch 16 and discrete AES audio channels AES Ch1 thru
AES Ch 16 is as shown in Figure 1-3. In this mode, the routing is basic 1-to-1
embedding/de-embedding for the 16 embedded and AES discrete audio
channels. Other sources and/or destinations (described below) for each
channel are selected using the card edge controls or a remote control system.
As shown in Figure 1-1, the 9085 and 9085 are equipped with eight discrete
AES input pair ports and eight discrete AES output pair ports. On Rear I/O
Modules having limited AES I/O capabilities, switches S11 thru S14 allow
available rear module BNC connectors to be allotted between AES inputs and
outputs as desired. Buffered copies of
AES OUT (1-8) are available as
dedicated outputs and as respective outputs fed through S11 – S14 on the
card.
Figure 1-3 Default Embed/De-Embed Audio Routing
Embed Ch 1
AES Ch 1
Embedded Audio
Group 1/2
Embed Ch 8
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•
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AES Ch 8
Embed Ch 9
AES Ch 9
Embedded Audio
Group 3/4
Embed Ch 16
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•
•
•
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AES Ch 16
AES Ch 1
AES Audio Out
Pairs 1-4
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•
•
AES Ch 8
AES Ch 9
AES Audio Out
Pairs 5-8
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•
•
AES Ch 16