Technical data

The diagram left shows how the building blocks
of the DCN Next Generation fit together. The Audio
Communication Network (ACN) family of protocol
converter chips is simply connected to the network
cabling carrying the digital signal.
The dedicated logic ICs, in combination with analogue-
to-digital and digital-to- analogue converters, convert the
digital signal from the DCN Next Generation to audio,
and convert the contributor’s audio signal to digital, ready
for protocol conversion by the ACN chip.
Audio Expanders
A new addition to the DCN Next Generation
Interpretation System is the ability to connect audio
expanders. This makes it possible to extract and insert
audio into the system. These audio expanders are con-
nected to the CCU via the optical network cable.
The audio expander can be used to record and distribute
the floor signal and available languages from the system.
A special function of the audio expander enables the
coupling of small systems with only few languages into
a large system with as many as 31 languages.
4| Introduction | DCN Next Generation Interpretation System Data Brochure
Control
Panel
µP
µP
ram
DSP DSP
DAPACN 2
ACN 1
DUART
flash
EPROM
LBB 4402/00
Audio Expanders
LBB 4100/00
Central Control Unit
e.g. Audio Matrix/
Remote Interpretation
Personal
Computer
LBB 4112/00
Data Distribution Board
LBB 4120/00
Interpreter Desk
LBB 4124/00
Channel Selector
DAP
DAC
DAPACN1
DAC
ADC
DAC
The building blocks of DCN
DCN Next Generation Interpretation System network
DCN NG
Audio Expander
PC Control
DCN NG Interpretation Desks
DCN NG Channel Selectors
DCN NG
Central Control Unit
Optical Network Cable
DCN Network Cable