Handbook

Redbox User Handbook No 1
3
RB-ADDA Inputs
XLR Analogue Inputs (Left and Right)
The XLR 3 pin sockets used for the left and right channel inputs are electronically balanced
and have an impedance of greater than 10kΩ bridging. Each XLR has the following
connections:
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
RCA Phono Inputs (Left and Right)
The two left and right RCA inputs are unbalanced and have an impedance of greater
than 20kΩ.
Input Level Adjustment
The input gain can be individually adjusted for left and right channels by dipswitches and
through pre-set potentiometers accessible on the rear panel. For full scale dB settings refer
to Fig 1-4.
Individual preset pots give a further ± 3dBu to give a total gain range of +9dBu to +27dBu
for full-scale digits. The consumer input on the phono connector has a further 10dbU gain
incorporated to give a total gain range of -1dBu to +17dBu for full-scale digits.
AES/EBU Inputs
The digital input XLR 3 pin socket has an impedance of 110 Ω. It has the following
connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on this connector should meet the IEC 60968 specication
S/PDIF Inputs
The S/PDIF digital phono inputs have an impedance of 75Ω.
RB-ADDA Outputs
Analogue Outputs (Left and Right)
The XLR 3 pin output plug connectors are electronically balanced with an output
impedance of less than 50Ω. They have the following connections:
Pin 1: Screen.
Pin 2: Phase.
Pin 3: Non-phase.
RCA Phono Outputs (Left and Right)
These RCA (phono) outputs are unbalanced and have an output impedance of less
than 75Ω.
DIGITAL AUDIO CONVERTERS - RB-ADDA
DIGITAL AUDIO CONVERTERS
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