AAA-3780:   Balanced / Unbalanced Line Audio Interface Amplifiers.

FEATURES:


      User configurable.
      Unbalanced to balanced;
         or
      Balanced to unbalanced.
      High common mode rejection.
      Wide gain range.
      High packaging density.

Brochure  

User Manual  

GENERAL:


The AAA-3780 Eurocard audio interface amplifier module contains four separate amplifiers designed to provide level matching and to interface balanced 600 Ω and unbalanced high impedance audio signals.

The AAA-3780 is a standard IRT Eurocard module and is compatible with our other Eurocard products.

Gain controls are accessible on the front panel.

Each of the four channels can be individually configured as either balanced to unbalanced or unbalanced to balanced.

Uses for the AAA-3780 include:

      Gain matching of multiple unbalanced signals to balanced audio signals at a central location.
      Matching balanced signals to unbalanced lines.
      Using hi fi components such as CD players in a professional studio chain.
      Matching studio signals to unbalanced recorders.
      Matching transducers to instrumentation recorders.


TECHNICAL SPECIFICATIONS:


Inputs:
Type
Tranformerless, choice of balanced or unbalanced.
Number
1 per amplifier.
Impedance
> 10 kΩ.
Maximimum Input Level
24 dBu.
Input CMR
> 45 dB 20 Hz to 20 kHz.

Outputs:
Type
Transformerless, choice of balanced or unbalanced.
Number
1 per amplifier.
Impedance     Balanced
< 40 Ω.
                       Unbalanced
< 60 Ω.
Maximum output level
24 dBu.
DC on output
< ±20 mV.

Performance:
Overall gain
Set by front panel control.
Adjustable from no output to a maximum of +10 dB.
Frequency response
0.5 dB (20 Hz to 20 kHz).
Total harmonic distortion
< 0.01% (measured @ +10 dBm input) (20 Hz to 20 kHz).
Phase difference between channels
< 0.1° (20 Hz to 15 kHz).
Noise
< 75 dBm unweighted.
Crosstalk ratio
> 80 dB.

Connectors:
Balanced
Pluggable screw block connectors.
Unbalanced
RCA phono.

Power Requirements:
Voltage
28 Vac CT (14-0-14) or 16 Vdc.
Power consumption
< 2 VA (55mA, no signal).

Other:
Temperature range
0 - 50°C ambient.
Mechanical
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.



           



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