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Redbox User Handbook No 1
Inputs and Outputs
AES/EBU Inputs
The digital source XLR 3 pin sockets have an impedance of 110Ω. They have the following
connections and meet the IEC 60968 specification:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
S/PDIF Inputs
The digital source RCA phono inputs both have an impedance of 75Ω.
AES/EBU Outputs
The digital output XLR 3 pin plugs have an impedance of 110Ω. They have the following
connections and meet the IEC 60968 specification:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
S/PDIF Outputs
The digital output S/PDIF phono outputs have an impedance of 75Ω.
Rear Panel Controls
Digital Input & Output Select Buttons
These buttons are used to switch the digital connection between the AES/EBU XLR
connector (button out) and the S/PDIF phono connector (button in) for the digital source
and digital output.
Mode Select Dip Switches
RB-SP1 Mode Select Settings
1
ON
Input 1 Channel B = Output 2 Channel B in Stereo/Mono Split Mode
1
OFF Input 1 Channel B = Output 2 Channel A in Stereo/Mono Split Mode
2
ON
SRC Enabled
2
OFF SRC Disabled
3
ON
Dual Mono in Stereo/Mono Split Mode
3
OFF Single Mono in Stereo/Mono Split Mode
4
Reserved
Fig 5-6: RB-SP1 Mode Select Dip Switches
Altering the Stereo/Mono Split/Combine Mode – In Split mode With switch 1 off, channel
A (Left) and B (Right) on the input are transferred to channel A (Left) of outputs 1 and 2
respectively. With switch 1 on, channel A (Left) on the input is transferred to channel A (Left)
on output 1 and channel B (Right) on the input is transferred to channel B (Right) of output
DIGITAL AUDIO CONVERTERS
D
IG
IT
A
L
A
U
D
IO
C
O
N
V
E
R
T
E
R
S
-
R
B
-S
P
1
5
