Sonifex RB-ADDA2 Combined A/D and D/A Converter
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Manufacturer Code: RB-ADDA2
Sonifex RB-ADDA2 Highlights
- Convert Stereo Balanced XLR or Unbalanced Phono to AES/EBU or S/PDIF
- Convert AES/EBU or S/PDIF to Stereo Balanced XLR or Unbalanced Phono
- 4 Modes of operation
- Can be adjusted by Sonifex SCi (Serial Control Interface)
- Rackmountable with the RK3 Kit
Included in the Box
- 1 x RB-ADDA2
The RB-ADDA2 A/D and D/A converter is a 1U rack-mount which produces an AES/EBU, S/PDIF or TOSlink optical level digital audio output from a balanced XLR or unbalanced phono stereo audio input. It also produces a stereo balanced XLR or unbalanced phono output from an incoming AES/EBU, S/PDIF or TOSlink optical digital input signal.
The RB-ADDA2 is a high performance, enhanced version of the RB-ADDA providing the following additional features:
The A/D SOURCE push-button is used to select from either the balanced or unbalanced stereo analogue inputs and this push-button also defines the input level for full scale digits at one of 12dBFS, 18dBFS or 24dBFS. These values can then be fine-tuned by using rear-panel pre-set potentiometers which give another ±3dB of gain adjustment, allowing a signal range from 9dBu to 27dBu. The RCA phono inputs have a further 10dB gain incorporated to give a total gain range of -1dBu to 17dBu for full-scale digits.
For the digital output, there are three push-button switches to select the sample frequency, bit depth and status bit modes. The FREQUENCY button allows selection of the master sample frequency from one of 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz. The BITS button sets the output bit depth as one of 16, 20 or 24 bits, and the CS DATA button defines the content of the channel status bits embedded within the digital audio stream. The status bits can be forced to either Professional Mode (PRO), Consumer Mode (CON) or to follow the mode of the input (FOLLOW).
The SYNC button is used to select the synchronisation input, from Word Clock, AES/EBU or the D/A input, and also the synchronisation mode of the digital output. The A/D section of the RB-ADDA2 operates in four selectable modes:
In this mode the unit receives an analogue audio signal, which is digitised and formatted for digital serial transmission (IEC958). The necessary clock signals are generated internally from an on board master clock at a selectable rate (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz).
In this mode the unit is synchronised to an external source, using the digital audio sync or D/A input signal from which the clock signals are stripped, or to the TTL level Word Clock. The FREQUENCY LED will indicate the synchronised sample frequency and if no sync is present, no output will be generated.
Here, the unit is synchronised to an external source, using the digital audio sync or D/A input signal from which the clock signals are stripped, or to the TTL level Word Clock. If no sync signal is present the unit runs from the onboard master clock at a rate selected by the front panel control (32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz).
Auto Lock Mode
This operates like the auto mode except that if no sync signal is present the unit will run at the closest master clock rate to the last locked incoming signal. The FREQUENCY LED will indicate the synchronised sample frequency.
When operating in sync modes, the SYNC button flashes whenever the unit is not synchronised to the incoming digital signal.
The D/A section has one SOURCE push-button which is used to select the digital input source from AES/EBU, S/PDIF or TOSlink optical and which also sets the analogue output level to be generated for full scale digits, from either 12dBFS, 18dBFS or 24dBFS. There are factory-set internal level controls for fine tuning the analogue output gain adjustment. If no digital audio source is present, the D/A SOURCE button flashes.
The RB-ADDA2 automatically decodes 50/15µs emphasis if this is indicated by certain channel status bits in the incoming digital audio data.
In both A/D and D/A sections, audio is sent to all of the outputs simultaneously. A red LED indicates when power to the RB-ADDA2 is on.
|Digital I/O||Inputs: 1 x AES/EBU XLR 3 pin female, 1 x S/PDIF RCA phono, 1 x TOSlink optical. Outputs: 1 x AES/EBU XLR 3 pin male, 1 x S/PDIF RCA phono, 1 x TOSlink optical|
|Analogue Inputs||2 x XLR 3 pin (balanced), 2 x RCA phono (unbalanced)|
|Analogue Outputs||2 x XLR 3 pin male (balanced), 2 x RCA phono (unbalanced)|
|Word Clock||1 x TTL Word clock BNC, 1 x AES/EBU XLR 3 pin female|
|Sampling Frequency||32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz or 192kHz|
|Size||48cm (W) x 10.8cm (D) x 4.2cm (H) (1U), 19 (W) x 4.3 (D) x 1.7 (H) inches (1U)|
|Weight||Nett: 1.6kg Gross: 2.2kg, Nett: 3.5lbs Gross: 4.8lbs|
|Power Supply||Filtered IEC, switchable 110-120V, or 220-240V, fused, 10W max|
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