Junger Audio C8000 System - Manual (Page 7)

digital audio
modular
processing system
C8000
system configuration
1/7
Configuration of a C8000 frame
The C8k frame holds the cards physically. They are electrically connected to the back plane of the frame by a
64pin connector. The back plane distributes 5V power, several clocks, the CAN-bus, a few status and
address signals as well as the digital audio data from and to processors or I/O devices.
Audio bus line assignment:
32 audio bus lines S01 to S32 are used for the distribution of digital audio data. The majority of the modules
use the same 2ch format, i.e. 2 audio channels are multiplexed on to one output. Considering a 2ch
processing (DSP) module, one needs 1 of these 32 lines to connect an input device (e.g. AES IN) via Sx to
the processing module (DSP) and one line to connect the output of the DSP module to an output device (e.g.
analogue OUT) via Sy.
There is no rule for using the 32 lines with one exception:
! You must not connect more than one device output to a bus line at a time. If you connect more than
one device output to a bus line, you will destroy the audio signal.
But you can connect as many device inputs as needed to one device output
(e.g. for signal distribution or signal conversion purposes).
Each of the legacy modules has rows of jumpers to connect its output(s) to one of the 32 bus lines.
Some modules have more than one input / output so they need more than 2 bus lines to connect to other
devices.
At the module input side we have different solutions. Old devices also have rows of jumpers to connect to a
bus. Newer devices will select the relevant bus line by an electronic routing circuit.
You must tell it by one or more rotary encoder(s) from which bus line it should gather the audio data.
Newer devices like the C8402/03/04/05 (SDI Embedder / De-Embedder), the C8086+ (8 channel
LevelMagic), C8082 (5.1 fail over / switch over / ducking) as well as the 8305/06 (new MADI I/Os) and
8601/11/12 (Dolby Encoder / Decoder modules) have electronic output routing also and the ability to
multiplex 8 audio channels on one bus line. This increases the density of the audio bus system
dramatically. Such devices are backward compatible because they can also send and receive 2 channels per
bus line. See an example of such module carrier boards further below.
Please refer to the respective manual for details.
AES DSP Analog
Sx Sy