System Block Diagram; Fig 12-2: Rb-Oa3 System Block Diagram - Sonifex Redbox RB-SS10 User Handbook Manual

The RB-OA3 can be expanded to switch between up to 5 studios or up to 6 stereo pairs by
connecting a multiple of units together. With the addition of a single unit, expansion in
studio mode allows for 2 additional studios to take control of the transmission path and
additional equipment. If the expansion is made in bus mode, then three additional stereo
channels can be added. In total 4 x RB-OA3 units can be connected together to switch 6
stereo pairs between up to 5 studios. An optional cable kit, the RB-OA3C, is available to
connect expansion RB-OA3 units to a master RB-OA3.
The modes are configured by dip switches on the rear of each unit. Two dip switches control
the unit ID and two switches control whether the unit is in studio or bus mode.
A master unit, defined by a preset ID, conducts all communication between all units.

System Block Diagram

Control
Panels 1
Studio 1
Dip
Switch
Studio 2
Studio 3
All audio connections are balanced stereo

Fig 12-2: RB-OA3 System Block Diagram.

Redbox User Handbook No 3
Control
Panels 2
Processor
Relay & LSO
Switching
LSO Feeds
Serial
Port
GE N ER AL I N T E RFACE S
Control
Panels 3
Push
Switch
Transmission
Audio
Transformer
Mix
Input
12
Delay/
Control Dump
Extra Paths
(1 & 2)
LSO
Expansion
69