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.
      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.

Brochure  

User Manual  

GENERAL:

The DAA-4400 is designed to provide a solution to most AES/EBU digital audio signal distribution requirements.

The DAA-4400 will operate at AES sample rates 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.

A choice of rear assembly is available for either 110 Ohm or 75 Ohm use. No changes are required to the main DA to convert between the two output types. The input includes both 110 Ohm and 75 Ohm input connectors and is link selectable on the main PCB.

An optional SNMP (Simple Network Management Protocol) plug-in module is available for monitoring when used in an IRT frame fitted with SNMP capability.

The DAA-4400 is designed to fit IRT's standard 1RU and 3RU Eurocard frames and may be used alongside any other of IRT's analogue or digital Eurocards.


TECHNICAL SPECIFICATIONS:

Inputs:
Number
2.
Type
1 x 110 Ω balanced;
or
1 x 75 Ω unbalanced.
Selected by link on PCB.
Format
AES3-1992 standard.
Input level
200 mVp-p minimum.
Cable length
> 500 m 75 Ω (Belden 8281).
> 200 m 110 Ω (AES digital high quality shielded pair).

Outputs:
Number
8.
Type                 ZAA-4401 (standard)
110 Ω balanced > 3 Vp-p;
or
                        ZAA-4400 (optional)
75 Ω unbalanced > 1 Vp-p.
Monitoring
1 x 75 Ω unbalanced.
Format
AES3-1992 standard.

Performance:
AES sample rate
34 to 54 kHz continuous.
Rise & fall times
< 20 ns.

Power Requirements:
Voltage
28 Vac CT (14-0-14) or ±16 Vdc.
Power consumption
< 4 VA.

Connectors:
Balanced
Phoenix 3 terminal plug-in blocks.
Unbalanced
BNC.

Other:
Temperature range
0 - 50°C ambient.
Mechanical
Suitable for mounting in IRT 19" rack chassis with input, output and power connections on the rear panel.
Finish:             Front panel
Grey background, black lettering & red IRT logo.
                       Rear assembly
Detachable silk-screened PCB with direct mount connectors to Eurocard and external signals.
Dimensions
6 HP x 3 U x 220 mm IRT Eurocard.
Supplied accessories
Rear connector assembly including matching plugs for 110 Ω connections.
Optional accessories
SMU-4000 plug in SNMP Management Information Base (MIB) module.



                       
ZAA-4401
ZAA-4400
Standard
Optional
Rear Assembly
Rear Assembly


Due to our policy of continuing development, these specifications are subject to change without notice.