Junger Audio C8234 User Manual

digital audio
modular
processing system

4 MIC / Line inputs

features

• 4 high quality MIC / Line inputs

• 24bit sigma-delta A/D-converter

• Sample rates up to 96kHz

• Digitally controlled gain 0..+65dB

• Max. line input level +20dBu

• Pad attenuation -10dB (Line)

• Floating balanced analog inputs

• Electrical isolation between channels

• 48V phantom power

block diagram

1
2

-

3

In 1

4
5
6
7

+

8

AD1

C8000

C8234

Audio Bus

S01...S32

CAN
BUS

1
2

-

3
4

In 2

In 3

In 4

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

5
6
7

+

8

1
2

-

3
4
5
6
7

+

8

1
2

-

3
4
5
6
7

+

8

AD2

AD3

AD4

MUX

MUX

to C8000

In 1/2

bus routing

In 3/4

CAN

CTRL

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digital audio
modular
processing system

C8000

4 MIC / Line inputs

technical specifications

Dynamic range: 110 dB (RMS) digital FS

THD+N: < 0.09% @ max. input level

Equivalent Input noise:

Mic 126.5 dB (RMS) @ 200 Ohm, 40 dB gain

Max. input level: + 15 dBu (Mic)

+ 22 dBu (Line)

Frequency response: 10 Hz (-3 dB)...20 kHz (-0,5 dB) (SR=48kHz)
10 Hz (-3 dB)...40 kHz (-0,5 dB) (SR=96kHz)

Crosstalk: > 90 dB (20kHz)

CMR: > 80 dB (20kHz)

Input impedance:

MIC 9kΩ, differential
Line 20kΩ, differential

Gain: 0dB, +10dB to +65 dB in 1dB steps

Digital output:

resolution 24bit
sample rate 32...96 kHz

Input connector

RJ-45 4,5 & shield = ground

3=live, 6=return

Back plane connector:

ref. to DIN41612 64pin, a+b, male

Power supply +5V DC

consumption appr. 1300 mA

Dimensions 3 RU, 8 HP, 160 mm in depth

C8234

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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digital audio
modular
processing system

4 MIC / Line inputs

installation

C8000

C8234

Set the CAN rotary encoder to an address, which is not in use by an other module

of a C8000 frame (for details regarding CAN addressing, see C8000 system manual).

Pressing the INIT button during power up will initialize the module parameters to factory default values.

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

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

3/10

digital audio
modular
processing system

4 MIC / Line inputs

C8000

C8234

fields of application

Live recording (music, TV, radio)

multiple C8234s mounted in stage boxes (i.e. short distance from mics)
multi channel signal transmission of analog signals via C8306 optical or C8305 BNC MADI interface

Multi channel budget audio production

multiple C8234 may replace cheap converters of budget digital mixing desks
configurable converter design (mic, analog line, AES inputs to MADI and AES, analog out from MADI)

Multichannel HD recording

multiple C8234 in user specific configured converter boxes as break out devices for
multi channel HD recording systems
multi channel signal transmission by use of C8306 optical MADI interface

Budget analog inputs for any kind of C8000 system designs

mic inputs
analog line inputs

Remote operation via web interface (IE 7, FF 2.0)
customer designed, dedicated controls (e.g. of mixing consoles) via Junger HTTP based API
(documentation on request)

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

phone: [phone]
fax: [phone]
[e-mail]
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4/10

digital audio
modular
processing system

C8000

4 MIC / Line inputs

remote configuration via web interface

Set up of all configurations, parameters and functions via web browser.
See also C8702 frame controller manual and respective firmware release notes.
Layout and functionality are related to firmware version 1.1.x of the C8702.

PRESET: Each Preset includes the parameters of all 4 inputs.

There are 8 User-Presets available. They can be changed manually or by GPI.

C8234

Functions: - Copy & Paste the active Preset via CLIPBOARD

to other modules within a frame

- Load, Save Presets (8 user presets)

- Backup, Restore (all presets to / from file)

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

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fax: [phone]
[e-mail]
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digital audio
modular
processing system

C8000

4 MIC / Line inputs

DEVICE: Display of device specific information

C8234

Functions: Set up of a device name

Restart (warm start) or Initialize (to factory default!)
Backup, Restore (all settings to / from file)
Display of firmware version

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

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fax: [phone]
[e-mail]
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digital audio
modular
processing system

4 MIC / Line inputs

PARAMETER: Set up of operating parameter

C8000

C8234

Function: Gain - setting from 0dB, 10dB to 65dB

Line - will activate an input pad to attenuate the signal by 10 dB
Mute – mutes the respective input
Phantom Power – turns 48 V phantom power on

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

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

7/10

digital audio
modular
processing system

C8000

4 MIC / Line inputs

BUS ROUTING: Routing of inputs to the C8000 audio buses

C8234

Function: Routing of In 1/2 and In 3/4 as pairs
Enable the C8000 bus driver

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

phone: [phone]
fax: [phone]
[e-mail]
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digital audio
modular
processing system

4 MIC / Line inputs

GPI : Set up of frame wide GPI numbers to trigger a dedicated module function.

If a GPI is detected by an GPI/O module C8802 (TTL I/O) or C8807 (opto/relay I/O),

it will put an associated number on the CAN bus.

Each module in a frame is permanently listening for such numbers

C8000

C8234

Great care must be taken to avoid same numbers assigned to different functions! Because it will
activate multiple functions, causing great confusion in bigger installations, e.g. where Junger HW
remote controller is in place or GPIs are connected with automation systems.

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

phone: [phone]
fax: [phone]
[e-mail]
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digital audio
modular
processing system

4 MIC / Line inputs

GPO (Tally) : Set up of frame wide GPO numbers to trigger a dedicated GPO (Tally) of a

GPI/O module C8802 (TTL I/O) or C8807 (opto/relay I/O) if the associated function is

activated.

C8000

C8234

Great care must be taken to avoid same numbers assigned to different functions! Because it will
fire same GPO (Tally) by different functions, causing great confusion in bigger installations, e.g.
where Junger HW remote controller is in place or GPOs are connected with other management
systems. There is no mechanism implemented to check for doublets

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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