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DISTRIBUTION AMPLIFIERS    Digital Audio (AES / EBU)

 

DAA-4400   AES/EBU Distribution Amplifier

DAC-4411    AES/EBU DA with Analogue Monitoring

 

DAA-4400 AES/EBU Distribution Amplifier

Features

  • 8 outputs.
  • 75 and 110 Ohm inputs.
  • Choice of 75 or 110 Ohm outputs by changing rear
    connector assembly.
  • Front panel monitoring output.
  • Optional plug-in SNMP monitoring module.
  • All inputs and outputs transformer coupled.
  • Digital circuit re-shapes output and restores level.
  • No cable compensation adjustments required.

General

The DAA-4400 is designed to provide a solution to most AES/EBU digital audio signal distribution requirements.
The DAA-4400 supersedes the DAA-3400 and provides all of its predecessor's functions together with the added option of a plug-in Simple Network Management Protocol (SNMP) monitoring module for use with IRT's 4000 series SNMP system frame.
The DAA-4400 will operate at any frequency from 34 to 54 kHz and may be used with non-AES digital signals that have a net zero DC content.
Whilst analogue VDA's may be used for 75 Ohm AES signals, the digital circuitry of the DAA-4400 offers the advantage of restoring the signal rise and fall times and output level without the need to manually adjust gain and compensation controls.

Individual rear assemblies are available for 75 Ohm or 110 Ohm use. No changes are required to the main DA to convert between the two output types.
Additional rear assemblies of either type may be ordered separately. Both types include both 110 and 75 Ohm input connectors. The required input is selected by links on the main PCB.
The DAA-4400 is designed to fit IRT's standard Eurocard frames as well as IRT's 4000 series frame for use with IRT's SNMP system and may be used alongside any other of IRT's analogue or digital Eurocards.

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DAC-4411 AES/EBU DA With Analogue Monitoring

Features
  • 4 AES and 2 analogue stereo outputs.
  • 24 bit digital to analogue processing.
  • 75 and 110 Ohm inputs.
  • Choice of 75 or 110 Ohm AES outputs by changing rear connector assembly.
  • Front panel digital monitoring output.
  • Front panel audio level and AES error indications.
  • All inputs and outputs transformer coupled.
  • Digital circuit re-shapes output and restores level.
  • No cable compensation adjustments required.
  • Optional plug-in SNMP monitoring module

 

General

The DAC-4411 is designed to provide AES/EBU digital audio conversion to analogue stereo format. Two AES outputs are provided for through signal and monitoring purposes.
The DAC-4411 may be used with AES digital signals at 48 kHz.
The digital circuitry of the DAC-4411 restores the signal rise and fall times and output level without the need to manually adjust gain and compensation controls.
The digital converter monitors the AES signal for errors, and lights an alarm indication on the front panel.
LEDs are also provided to indicate the analogue output level. These are user adjustable, but factory set to a -40 dBFS threshold.

Link settings allow the analogue output to be muted on loss of digital input.

Individual rear assemblies are available for 75 Ohm or 110 Ohm use. No changes are required to the main DA to convert between the two output types.

Additional rear assemblies of either type may be ordered separately. Both types include both 110 and 75 Ohm input connectors and balanced analogue stereo output connectors. The required input is selected by links on the main PCB.
The DAC-4411 is designed to fit IRT's standard Eurocard frames as well as IRT's 4000 series frame for use with IRT's SNMP system and may be used alongside any other of IRT's analogue or digital Eurocards.

 

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