Junger Audio C8082 User Manual

C808

2

digital audio
modular
processing system

C8000

switch over & ducking

features

Automatic or manual Switch Over or Fail Over in case of input level loss. Ducking of a main stereo or
surround sound signal by a line level microphone or by a pre recorded announcement / ad input.

• 5.1 to stereo Fail Over / Switch Over

• 2x Stereo Fail Over / Switch Over

• 5.1 Ducking to C, L&R or L&C&R

• 2x Stereo ducking

• Detection of low input level and automatic Fail Over switching

• Detection of the ducking source signal and automatic Ducking

• Manual operation via GUI or GPI for Switch Over and Ducking

block diagram

The block diagram on the next page gives an overview of the signal flow within the C8082.
It receives the input signals via four C8k audio busses. The Main signals (Main Stereo #1 and #2) must
be applied to Ch1/2 and Ch 3/4 respectively, while the Aux channels for Ducking or fail over must be
applied to Ch 5/6 and Ch 7/8.

The C8082 has 6 mixing nodes which perform the switching or ducking functions. Honestly there is no
real switch mode because all switch processes are cross fades to prevent from switching noise.

The mixing nodes receive their parameters depending on the operating mode from the DSP controller
on the PCB. This DSP controller communicates via CAN bus with the C8k Frame Controller.
Therefore it needs a unique CAN address.

The Frame Controller itself runs a web server. This web server generates a web technology based
GUI. It may be displayed by IE8 or FireFox 3.6 or higher (see C8702 manual for details).

The inputs of the C8082 are equipped with level detectors for either detecting a loss of the input or an
active source for Ducking. The Fail / Duck detection part performs the logical action depending on the
various input statuses and user defined operating modes.

6 two channel outputs feed the processed signals back to the C8k frame bus. Each of these 6 outputs
has the Junger Brickwall limiter inserted. This limiter not only provides smooth non distortion output
in case of an overload but also defines the maximum output level. The algorithms are adaptive to the
material so only one parameter, the Limiter Program, is needed to set up this part. For 5.1 or stereo
processing the limiter control circuits are automatically linked together for proper multi channel
operation.

Jünger Audio Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany

phone: [phone]
fax: [phone]
[e-mail]
www.junger-audio.com

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C808

2

digital audio
modular
processing system

switch over & ducking

C8082 block diagram

C8000

limiter

limiterlimiterlimiter

limiterlimiter

Jünger Audio Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany

phone: [phone]
fax: [phone]
[e-mail]
www.junger-audio.com

2/19

C808

2

digital audio
modular
processing system

C8000

switch over & ducking

technical specifications

AUDIO :
resolution : 24bit
sample rate : 32...48kHz
digital processing delay : 2ms constantly

GENERAL :
backplane connector : ref. to DIN41612, 64pin, a+b, male
power supply : +5V DC
power consumption : approx. 1.000mA
dimension : 3RU, 4HP, 160mm depth
temperature : 10°C … 40°C
humidity : 90%, non condensing

hardware settings

The C8082 does not have front panel controls. It may be configured by switches and
via web browser.

On the front panel there is a status LED with different display modes:

green = status OK
yellow flashing = the module is under control of the Frame Controller
red = status is bad. It needs remote reading of the status via GUI.

It is likely that the Frame Controller has issued a SNMP trap.

Jünger Audio Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany

phone: [phone]
fax: [phone]
[e-mail]
www.junger-audio.com

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C808

2

digital audio
modular
processing system

switch over & ducking

location of switches:

C8000

dip-switch settings

Since this type of module has an electronic output routing facility, great care must be taken when installing
or exchanging a module!

NO LABEL: ON
CAN address range is extended by +16 (counting from 0x10 to 0x1F)

OFF
CAN address range is standard (counting from 0x0 to 0xF) see rotary

encoder settings below.

REMOTE: must be ON
BUS-EN: ON

Connects the outputs to the C8k audio buses on power up automatically.

The output configuration will be taken from the NV (non volatile) memory.
OFF
Disconnects the module outputs from the C8k buses on power up.

Important note! To avoid audio bus conflicts when you replace a module or install an additional one and
the configuration is unknown, the output bus drivers must be disabled by BUS-EN=OFF before inserting it.
If all settings are done remotely and the unit fits into the bus assignment scheme of a frame, you must
remove it and place the switch back into position BUS-EN=ON.

TDM: must be OFF

Jünger Audio Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany

phone: [phone]
fax: [phone]
[e-mail]
www.junger-audio.com

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C808

2

digital audio
modular
processing system

C8000

switch over & ducking

rotary encoder settings

I/O not used
MODE not used

CAN 0 – F
The 16 switch positions are hexadecimal numbers (0x0 to 0xF) it sets the

CAN ID. Each module within a frame must be assigned a unique CAN bus

address for proper communication with other parties of the frame, e.g. the

frame controller or the GPI/O module.

Important note! This address also sets the position of the module graphic when you control the frame via
the web GUI by a C8702 frame controller. See C8k system manual for details.

remote control operation

- Web-server based remote control of parameters via frame controller C8702

- 3rd party remote control by http protocol based API

(please contact Junger Audio for details)

- Hardware GPI/O control of preset operation and special module functions

- Remote control by the brc8x Broadcast Remote Controller via CAN bus

Jünger Audio Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany

phone: [phone]
fax: [phone]
[e-mail]
www.junger-audio.com

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C808

2

digital audio
modular
processing system

switch over & ducking

web browser based configuration

OVERVIEW

C8000

The above example shows a C8082 working with the C8403 HD-SDI Interface.
Clicking on the spanner tool within the module graphics of the C8082, will open the pages of that
module while the switching tool will open the Preset load function only.

Jünger Audio Studiotechnik GmbH
Justus-von-Liebig-Strasse 7
D -12489 Berlin
Germany

phone: [phone]
fax: [phone]
[e-mail]
www.junger-audio.com

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