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Redbox User Handbook No 1
RB-ADDA2 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 is set for both left and right channels by using the A/D SOURCE Select Button
(Fig 2-4). Pre-set potentiometers, accessible on the rear panel, give a further ± 3dBu to give a
total signal range of +9dBu to +27dBu for full-scale digits.
The RCA Phono Inputs have a further 10dBu nominal gain incorporated to give a total signal
range of -1dBu to +17dBu for full-scale digits.
AES/EBU Input
The digital input XLR 3 pin socket has an impedance of 110Ω. 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 specification
S/PDIF Input
The S/PDIF digital phono input have an impedance of 75Ω.
Optical Input
The digital audio optical input meets the TOSLink specification used by most professional &
consumer equipment.
AES/EBU Sync Input
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 specification.
DIGITAL AUDIO CONVERTERS
2
DIGIT
AL A
UDIO C
ONVERTERS - RB
-ADD
A2