Cobalt Digital COMPASS 9341 8-channel Analog Audio to AES Converter - Manual (Page 9)

9341-OM (V4.1) 9341 PRODUCT MANUAL 1-5
Introduction
9341 Functional Description
9341 Functional Description
Figure 1-1 shows a functional block diagram of the 9341. The 9341 receives
up to eight balanced audio inputs and converts these into up to four AES-3id
output pairs. The output timing can be locked to a DARS input timing, black
burst or tri-level video reference signal, or the card’s internal clock.
The 9341 also provides audio routing that acts as a full audio cross point.
Each of the eight AES output channels can receive signal from any card input
source. Unused output channels can be mapped to a “Silence” source. Each
output also provides gain adjustment and selectable polarity inversion.
Figure 1-1 9341 Functional Block Diagram
AES Audio Output Format
The 9341 provides up to 8 channels (4 pairs) of discrete AES audio on
75-ohm BNC connections per AES-3id/SMPTE276M. The output clock rate
of each pair is precisely locked to input DARS timing, frame reference
timing, or the card’s internal independent timing.
Audio A/D
Audio
Routing/
Gain
Control
AES
Encode
Analog Audio
IN (1-8)
AES OUT
(1-4)
Timing Ref
Selection
CLK Gen
PLL
Ext. Frame
Ref IN
(DARS, Black
Burst/
Tri-Level, or
Internal)
Note: Signal connections shown depicts
full 9341 input/output capability.
Practical input/output signal
availability is determined by Rear
I/O Module used. Refer to 9341
Rear I/O Modules (p. 1-13) for
more information.
2.0-to-5.1
Upmixer
(NOTE 2)
Active: Overwrites
6 selected channels
with new 5.1 mix.
See text.
Bypass: Bypasses
2.0-to-5.1 upmixer;
all original channels
pass unaffected.