Manual

Chapter 4 - RB-ADDA Combined A/D and D/A Converter
Redbox User Handbook 4-3
4.4. Rear Panel Connections and Operation
Fig 4-3: RB-ADDA Rear Panel
4.4.1. RB-ADDA Inputs
4.4.1.1. 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.
4.4.1.2. RCA Phono Inputs (Left and Right)
The two left and right RCA inputs are unbalanced and have an impedance of greater
than 20kΩ.
4.4.1.3. 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 4.4.3.1.
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.
4.4.1.4. 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 specification