security systems bu communication systems st/seu-co 1 dcn sa sd technology 16.11.2001 the dcn...

Security Systems BU Communication Systems

DCN SA SD Technology16.11.2001 ST/SEU-CO 1

The DCN Technology

Full Digital Audio and Data transport and processing.

To prepare Audio-signals and control Data-signalson one cable we design special Custom BuiltIntegrated circuits.

PRAEDIC (PRofessional Audio Encoder / Decoder Integrated Circuit)

Is a single chip bitstream AD converter / multibitDA converter with digital filters and supportingamplifiers.

I&O Manual



Audio Communication Network

ACN-1 (Audio Communication Network-1) Is a Slave Protocol Transceiver located in all active

DCN-units Receiving single-channel downlink

Audio-data and Control-data Transmits single-channel uplink

Audio-data and Control-data. ACN-2

Is a Master Protocol Transceiver located only in the CCU

Transmits multi-channel downlinkAudio-data and Control-data

Receives multi-channel uplinkAudio-data and Control-data from all the slaves.




ACN-3

Is a Slave Protocol receiver, located only in thepassive DCN-units like the program selector

receives multi-channel downlinkAudio-data and Control-data only.


ST/SEU-CO 4DCN SA SD Technology16.11.2001

µProc.µProc.

FLASHEPROMFLASHEPROM

RAMRAM DSPDSP

ACN-2ACN-2

Central Control Unit (CCU)

TCB (4)

ACN-1 - up/down linkACN-2 - up/down linkACN-3 - downlink only

Networkcabling

Channel selector unit

ACN-3ACN-3DACDAC

Delegate / Chairman unit (Discussion)

ACN-1ACN-1PRAEDICPRAEDIC

LBB 3510/00 Network card

ACN-1ACN-1

ISA bus

PRAEDICPRAEDICLBB 3513/00 Analog Audio Input / Output Module

ACN-1ACN-1 PRAEDICPRAEDICChannel I/OChannel I/O

RemoteInterpretation

RemoteInterpretationRCRC

LBB 3512/00 Data Distribution Board

e.g. Hall Displaye.g. Hall DisplayACN-1ACN-1 µProc.µProc. RS-232RS-232

ACN-1ACN-1 PRAEDICPRAEDIC

ControlPanel

ControlPanel

RS-232RS-232

Only available in LBB3500/15 /35

RS-232RS-232

Alternative for PC with LBB 3510/00 Network card

Personal Computer Personal Computer

Line I/O Rec. I/O Line I/O Rec. I/O

ACN-3ACN-3 DACDAC

Delegate / Chairman unit (Concentus). Interpreter Desk

ACN-1ACN-1 PRAEDICPRAEDIC




The DCN Network Cable

Network CablingUplink

DownlinkACN 2ACN 2

ACN 1ACN 1 ACN 3ACN 3



ACN - Protocol

Addresses Active unit addresses 240

Delegate,Chairman,Interpreter Units Passive units addresses

Electronic Channel Selector 1 (232) Data Distribution Board 8 (248..255)

PC addresses 5 Network Card

Control panel CCU address 1 (0) Ambient microphone via 1 (238)

Dual Audio Interface



ACN - Protocol

Data

Data-rate uplink and downlink 5 Mbit/s

Downlink status 32 bits/32ms

Uplink status 16 bits/32ms

Number of data downlink channels 7

Number of data uplink channels 2



ACN - Protocol

Capacity

Capacity data downlink channel 64 kbit/s

Capacity data uplink channel 3(PC Interface) 64 kbit/s

Capacity data uplink channel 0(card reader) 128 kbit/s

Initialization cycle 256 ms/unit

Audio uplink channels (14 kHz bandwidth) 15

Audio downlink channels (14 kHz bandwidth) 15

Intercom uplink channels (3.5 kHz bandwidth) 4 (1..4)

Intercom downlink channels (3.5 kHz bandwidth) 4 (1..4)



ACN - Protocol

Maximum Capacity of Translation Channels Audio uplink channels 11 (14 kHz bandwidth) Audio downlink channels 11 (14 kHz bandwidth)



Audio Coding and Quality

Coding The coding method used is the so-called

8-APCM, for 8-bit Adaptive Pulse Code Modulation. Using this method, the transmitter compresses 15 bit of audio-data to an 8-bit floating point notation with a scale factor. The receiver expands the data again to 15 bit. Compression and expansion are a part of the functionality of the ACN 1,2 & 3 chips.



Audio Coding and Quality

Quality Frequency characteristics 125 Hz - 14 kHz (*) Harmonic distortion < 0.5 % Harmonic distortion at overload < 1.0 % Signal to noise with mic on > 60 dB Crosstalk attenuation at 4 kHz > 80 dB Dynamic range > 90 dB (*) Intercom links 125 Hz - 3.5 kHz



Channel Handling

Discussion / Conference systems

System with 1 Interpreter channel

System with 11 Interpreter channels

System in Mix - Minus or Insertion Mode



System with 1 Interpreter Channel

Slot Downlink Uplink 0 Interpreter Floor Delegate Contribution 1 1 Interpreter Channel 1 Interpreter Channel 1 2 Spare Spare 3 Spare Spare 4 Spare Spare 5 Spare Spare 6 Spare Spare 7 Spare Spare 8 Spare Spare 9 Spare Spare 10 Spare Spare 11 Spare Spare 12 Equalized Public Address Delegate Contribution 413 Delegate's Loudspeaker Delegate Contribution 314 Public Address Delegate Contribution 215 Intercom Channels 1..4 Intercom Channels 1..4



System with 11 Interpreter Channels

Slot Downlink Uplink 0 Interpreter Floor Delegate Contribution 1 1 Interpreter Channel 1 Interpreter Channel 1 2 Interpreter Channel 2 Interpreter Channel 2 3 Interpreter Channel 3 Interpreter Channel 3 4 Interpreter Channel 4 Interpreter Channel 4 5 Interpreter Channel 5 Interpreter Channel 5 6 Interpreter Channel 6 Interpreter Channel 6 7 Interpreter Channel 7 Interpreter Channel 7 8 Interpreter Channel 8 Interpreter Channel 8 9 Interpreter Channel 9 Interpreter Channel 9 10 Interpreter Channel 10 Interpreter Channel 10 11 Interpreter Channel 11 Interpreter Channel 11 12 Equalized Public Address Delegate Contribution 413 Delegate's Loudspeaker Delegate Contribution 314 Public Address Delegate Contribution 215 Intercom Channels 1..4 Intercom Channels 1..4



System with 11 Interpreter Channels

Contribution Delegate Units Contribution Interpreter Desks Distribution Units Line input Recording input Equalized Public Address Output Delegate's Loudspeaker Output Public Address Line- & Recording- Output Intercom Channels 1..4

1-11 Translation Channels can be used in combination

with:



Channel overview in standard Mode

CCU Mode: Standard (default) 11

Contribution Delegate Units Y

Contribution Interpreter Desks Y

Distribution Y

Line Input Y

Recording Input Y

Equalized Public Address Output Y

Delegate’s Loudspeaker Y

Public Address Line-Output &Recording-Output Y

Intercom Channels 1..4 Y



System in Mix - Minus or Insertion Mode

Slot Downlink Uplink 0 Interpreter Floor Delegate Contribution 1 1 Interpreter Channel 1 Interpreter Channel 1 2 Interpreter Channel 2 Interpreter Channel 2 3 Interpreter Channel 3 Interpreter Channel 3 4 Interpreter Channel 4 Interpreter Channel 4 5 Interpreter Channel 5 Interpreter Channel 5 6 Interpreter Channel 6 Interpreter Channel 6 7 Interpreter Channel 7 Interpreter Channel 7 8 Interpreter Channel 8 Interpreter Channel 8 9 Interpreter Channel 9 Interpreter Channel 9 10 Interpreter Channel 10 Interpreter Channel 10 11 N.A. Mix-Minus or Insertion Ch 12 Equalized Public Address Delegate Contribution 413 Delegate's Loudspeaker Delegate Contribution 314 Mix-Minus or Insertion Ch. Delegate Contribution 215 Intercom Channels 1..4 Intercom Channels 1..4



System in Mix - Minus or Insertion ModeSlot Downlink Uplink 0 Interpreter Floor Delegate Contribution 1 1 Interpreter Channel 1 Interpreter Channel 1 2 Interpreter Channel 2 Interpreter Channel 2 3 Interpreter Channel 3 Interpreter Channel 3 4 Interpreter Channel 4 Interpreter Channel 4 5 Interpreter Channel 5 Interpreter Channel 5 6 Interpreter Channel 6 Interpreter Channel 6 7 Interpreter Channel 7 Interpreter Channel 7 8 Interpreter Channel 8 Interpreter Channel 8 9 Interpreter Channel 9 Interpreter Channel 9 10 Interpreter Channel 10 Interpreter Channel 10 11 Interpreter Channel 11 Interpreter Channel 11 12 N.A. Mix-Minus or Insertion Ch 13 Delegate's Loudspeaker Delegate Contribution 314 Mix-Minus or Insertion Ch. Delegate Contribution 215 Intercom Channels 1..4 Intercom Channels 1..4


ST/SEU-CO 19DCN SA SD Technology16.11.2001

Channel overview

CCU Mode: Mix- Minus or Insertion 10 11

Contribution Delegate Units Y Y ¹

Contribution Interpreter Desks Y Y

Distribution Y Y

Line Input Y Y

Recording Input Y Y

Equalized Public Address Output Y Y

Delegate’s Loudspeaker Y Y

Public Address Line-Output & Recording-Output Y/ N ² Y/ N ²

Intercom Channels 1..4 Y Y

² For more information select Audio RoutingDCNtech SA SD Mix-Minus Mode or DCNtech SA SD Insertion Mode

¹ Only possible by using the Microphone mode with max. 2 Microphones ON

I&O Manual



DCN Technology

End of section

Robert Bosch GmbH

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third parties in whole or in parts is prohibited without the

written consent of the copyright owner.

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