Redbox User Handbook No 1
21
Front Panel Indicators
Front Panel LED
The LED on the front panel is normally red to indicate that power is present on the unit.
However, it also has a secondary role to indicate the status of the digital inputs
Fast flashing between red and amber – indicates a loss of digital input signal.
Slow flashing between red and amber - when not in master mode this indicates the absence
of a synchronising input.
Rear Panel Connections and Operation
Fig 3-3: RB-SC1 Rear Panel
Inputs and Outputs
AES/EBU Inputs
The digital source and digital sync XLR 3 pin sockets both have an impedance of 110 ohms.
They have the following connections:
Pin 1: Screen
Pin 2: Phase
Pin 3: Non-phase
The signals on these connectors should meet the IEC 60968 specification
S/PDIF Inputs
The digital source and digital sync S/PDIF phono inputs both have an impedance of 75Ω.
Word Clock Input
The BNC TTL word clock input has an impedance of 50Ω.
DIGIT
AL A
UDIO C
ONVERTERS - RB
-SC1
DIGITAL AUDIO CONVERTERS
3
AES/EBU
Audio
Input
Word-Clock
Sync Input
Frequency and Sync Mode
Rotary Switch
Status
Select
Switches
S/PDIF
Input
Digital
Input
Select
Button
AES/EBU
Sync
Input
S/PDIF
Output
AES/EBU
Audio
Output
Digital
Output
Select
Button
Digital
Sync Input
Select
Button
S/PDIF
Sync
Input