The RB-OA3 is a 1U rack-mount, unity gain on-air switcher, capable of switching three stereo pairs between three studios. Each studio can control the transmission path together with two peripheral paths for equipment such as a codec or hybrid and there is also a “Last studio to offer” bus, allowing for seamless and continuous broadcast from any multi-studio radio network. A “sustain” mode allows for a sustaining system, such as a PC automation system, to control the broadcast. Multiple RB-OA3 units can be connected together to switch more studios or more stereo pairs. The switching is achieved using relays, except the “last studio to offer” which is switched by an analogue switch. The transmission path is switched using latching relays. This means that if there is a power failure to the unit, the transmission path will remain selected.
Product Features
Controls the offer/accept switching for 3 studios.
Switches 3 stereo bi-directional channels.
Has a stereo transformer mix input, e.g. for playout system.
Continuity mode allows switching to/from a PC playout system.
Latching relay switching means transmission path remains intact on power-fail.
Expandable to switch 6 stereo channels between 5 studios.
'Last studio to offer' bus.
Profanity delay control sharing.
Typical Applications
Designed for multi-studio switching & routing the studio output to the transmitter.
Product Category
Source Selectors
Technical Specifications
Transmission and Peripheral Path:
Relays are used for switching these specific paths leading to a passive, transparent audio path.
LSO Path:
Input Impedance: >20kΩ
Output Impedance: <50Ω
Gain Range: Unity gain
Frequency Response: 20Hz to 20kHz ±0.1dB
Common Mode Rejection: < -66dB typically
Distortion: 0.01%THD @ 1kHz
Noise: -100dB unity gain, ref +8dBu
Mix Audio Transformer Specifications:
Common Mode Rejection: < -64dB @ 10kHz
Distortion: 0.5% THD ref 17dBu @ 40Hz
Bandwidth: ±0.5dBu 10Hz to 36kHz
Connections
Studio I/O: 3 x 25 way D type socket (female)
Transmission I/O: 1 x 25 way D type socket (female)
Dump/Delay Control: 1 x 9 way D type plug (male)
Studio Control: 3 x 15 way D type sockets (female)
LSO Expansion Port: 1 x 9 way D type socket (female)
Mix Input: 1 x 9 way D type socket (female)
Serial Ports: 2 x RJ45
Mains Input: Filtered IEC, 110V-120V, or 220-240V switchable, fused, 9W maximum
Fuse Rating: Anti-surge fuse 2A 20 x 5mm
Equipment Type
RB-OA3: 3 Studio on-air switcher
Physical Specification
Dimensions (Raw): 48cm (W) x 15.8cm (D) x 4.2cm (H) (1U)
Dimensions (Raw): 19” (W) x 6.2” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 59cm (W) x 27.5cm (D) x 11cm (H)
Dimensions (Boxed): 23.2” (W) x 10.8” (D) x 4.3” (H)
