Cobalt Digital COMPASS 9066 Upconverter - Manual (Page 15)

9066-OM (V4.5) 9066 PRODUCT MANUAL 1-11
Introduction
9066 Functional Description
Audio Processor Description
The audio processor operates as an internal audio router. The router function
chooses from the following inputs:
• 16 channels of embedded audio from the SDI video
• 16 channels (8 pairs) of discrete AES input
• 8 channels of balanced analog audio input
• Four independent internal tone generators (described below)
• Digital silence (mute) setting
• Internal Down Mix and Mono Mixer outputs (described below)
The router function provides the following audio outputs:
• 16 channels of embedded audio on the SDI output
• 16 channels of discrete AES output on eight AES pairs
The router acts as a full audio cross point. Each of the 32 output channels (16
embedded AES, 16 discrete AES) can receive signal from any one of the 40
(16 embedded AES, 16 discrete AES, 8 analog) input channels, four internal
tone generators, or several mixer outputs. 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 pass through the 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 9066.) 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.
Note: As shown in Figure 1-1, the 9066 is equipped with eight discrete AES input
pair ports and eight discrete AES output pair ports. On Rear I/O Modules hav-
ing 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 (1-4) are available as dedicated outputs
and as respective outputs fed through S11 – S14 on the 9066 card.