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OFF
This will set the unit to Force Last Used Studio mode
ON
This will set the unit to Force Studio 1 mode
Fig 12-5: RB-OA3 Unit Identity Reset Settings.
Force Last Used Studio Mode
When a studio is selected, the value of that studio is stored in the unit. This is then recalled
on boot up so that the last studio to transmit is reconnected. This is useful in loss of
power situations, since the latching relays will remain in position on start up, leaving the
transmission path unaffected.
Force Studio 1 Mode
On boot up Studio 1 is given transmission control. This is useful for returning the unit to a
known position.
Note: When connecting multiple units together ensure that there is only one of
each type of unit. If you connect units of the same type, communication errors
will occur. For security, once initialized, the unit will retain its ID until power down
regardless of any DIP switch changes.
Configuring for Operation
The RB-OA3 can be used in both single (MASTER) and multiple expansion modes.
Single (MASTER) Mode
When used as a single (MASTER) unit, the RB-OA3 is used to switch 3 stereo busses between
3 studios, allowing them to share the same transmission path and peripheral devices such
as hybrids or profanity delays. A single unit must always be configured as a MASTER unit.
Studio Connections
Each connector has a dedicated channel for the master transmission and for each of the two
additional balanced stereo channels. The connector also provides the Last Studio to Offer
(LSO) feed. The Transmission path is a latched pathway so that it will remain even if there is
no power supply. For this reason, the transmission output of your mixer should always be
routed to this channel. The peripheral channels are non-latching.
Control Panels
Connect the chosen control panels, such as an RB-OA3R, one to each STUDIO CONTROL
port. The control ports are designed to allow 200mA at 15V from each chosen connector.
An excess will cause a polyfuse to cut the voltage supply which can be reset by removing
the load.
Profanity Delay Connector
You can control a profanity delay connected to the unit. The control pulses are relay based
and can be wired either normally open or normally closed, to route a common signal.
Mix Input
If the mix input is to be used, connect the source to the unit. If not, the socket must be
terminated, or the MIX INPUT ON/OFF switch must be OFF, otherwise the output signal may
experience a loss of level (see page 12).
Redbox User Handbook No 3
GE N ER AL I N T E RFACE S
12
71
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