pro bel 4411 Technical Manual

Audio digital to analogue converter

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Summary of Contents for pro bel 4411

  • Page 1: Table Of Contents

    Technical Manual Contents Introduction Installation Selecting a rear connector Configuration Configuring AES inputs Setting analogue output levels Trouble shooting COSMOS Status Monitoring Specification Ordering information 4411...
  • Page 2: Introduction

    Audio Digital to Analogue Converter Introduction The 4411 module is an audio digital to analogue converter which may be fitted with one or two stereo DAC sub-boards, each providing electronically balanced analogue outputs from balanced or unbalanced digital inputs. Two rear connectors are available depending on the choice of balanced or unbalanced digital I/O.
  • Page 3 Technical Manual 4411...
  • Page 4: Installation

    Audio Digital to Analogue Converter Installation For module installation instructions please refer to the appropriate ICON rack frame section of the manual Selecting a rear connector There are two alternative rear connectors available. The K4411.3B is used for balanced signals, whilst the K4411.3U is used for unbalanced signals. Both occupy 30mm of rack width in the 1050 3U Icon rack frame or 1 slot in the 1051 1U rack frame.
  • Page 5 Analogue audio out Function Function AUDL1+ AUDL1- AUDR1+ AUDR1- AUDL2+ AUDL2- AUDR2+ AUDR2- The following 5V ‘auxiliary’ signals are for Pro-Bel use only; CBL(block start), Channel Status, User Data and Sample Rate Clock. These pins should not be grounded or terminated. 4411...
  • Page 6: Configuration

    Audio Digital to Analogue Converter Configuration Configuring AES inputs Jumper blocks PL5 and PL6 are provided to set AES input termination values and select balanced or unbalanced operation. Example termination for Example termination for unbalanced 75 W AES inputs balanced 110 W AES inputs DAC inputs can be balanced or unbalanced and of different termination values .
  • Page 7: Setting Analogue Output Levels

    +24dBu for Full Scale Digital (maximum digital value). Standard factory setup is +18dBu=0dB, FSD for Europe and +24dBu=0dB, FSD for the US. See ‘Ordering Information’ for the appropriate order codes for the two setup options. RIGHT 5635 LEFT Converter gain 4411...
  • Page 8: Trouble Shooting

    Audio Digital to Analogue Converter Trouble shooting There is no output signal • ensure that the green power LED on the front of the card is lit If not: • check the resettable fuses protecting the card - do this by removing the power to the card for about 30 seconds then restore the power •...
  • Page 9: Status Indicators

    Lights red to Indicate an invalid AES input on either INVALID Invalid input sub-module POWER Power OK Lights green if all voltage rails present 48kHz sample rate detected SAMPLE 44.1kHz sample rate detected RATE 32kHz sample rate detected 4411 status indicator assignments 4411...
  • Page 10: Cosmos Status Monitoring

    Audio Digital to Analogue Converter COSMOS Status Monitoring If the frame is equipped with a COSMOS controller card, the following parameters will be reported back to the COSMOS status monitoring system. • module present • sample rate detected, DAC one and DAC two •...
  • Page 11 Technical Manual 4411...
  • Page 12: Specification

    Audio Digital to Analogue Converter Specification Inputs (per sub-module) Number and type: 1, AES3-1992 balanced or AES3-id unbalanced Impedance: selectable 110W, 75W or high impedance Outputs (per sub-module) Number and type: 2, analogue audio, electronically balanced Level at 0dB, FSD: +15dBu to +24dBu Auxiliary 5V logic signals (per sub-module):...
  • Page 13 Technical Manual Temperature range Operating: 0° to +40°C Storage: -10°C to +70°C 4411...
  • Page 14: Ordering Information

    Audio Digital to Analogue Converter Ordering information ICO-4411-3BHS Audio DAC with 30mm rear panel, balanced AES3 input, peak level +24dBu, single stereo converter ICO-4411-3BHD Audio DAC with 30mm rear panel, balanced AES3 inputs, peak level +24dBu, dual stereo converter ICO-4411-3BLS...

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