14 Rb-Dda22 Digital Audio Distribution Amplifier With Multiple Outputs; Introduction; Fig 14-1: Rb-Dda22 Front Panel; Fig 14-2: Rb-Dda22 Front Panel Controls - Sonifex Redbox RB-DA6 6 User Handbook Manual

14 Audio Distribution Amplifier - RB-DDA22

14 RB-DDA22 Digital Audio Distribution Amplifier With Multiple Outputs

Introduction

Fig 14-1: RB-DDA22 Front Panel

The RB-DDA22 digital distribution amplifier is used for distributing digital
audio data in many formats, repeating both the audio data and the status
information of the input whilst re-clocking the data and re-normalising to
the appropriate standard digital audio levels.
The unit has 5 inputs and you can select one of them to distribute to all of
the 22 outputs.
Input Signals:
• 1 x XLR 3 female AES/EBU digital audio input
• 1 x BNC AES-3id digital audio input
• 1 x RJ45 AES/EBU digital audio input
• 1 x RCA Phono S/PDIF input
• 1 x TOSLink digital audio optical input
Output Signals:
• 6 x XLR-3 male AES/EBU digital audio outputs
• 6 x BNC AES-3id digital audio outputs
• 6 x RJ45 AES/EBU digital audio outputs
• 2 x RCA Phono S/PDIF outputs
• 2 x TOSLink optical outputs
The RJ-45 connectors are wired to be StudioHub+ compatible, a format
defined by Radio Systems Inc.
StudioHub+TM is a registered trademark of Radio Systems Inc
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Applications include distributing audio from a digital mixing desk to
multiple digital recorders, or feeding multiple studios with an output from a
USB audio player.
It can accept input sample rates in the range of 30kHz - 200kHz, and
bit rates of 16, 20 and 24 bit. So, it can be used for standard CD signal
distribution at 16 bit 44.1kHz, as well as for high quality 24 bit 96kHz or
192kHz recording.

Fig 14-2: RB-DDA22 Front Panel Controls

valid signal presence, or the operational frequency.
Operating Mode
In 'operating mode', the central button LED is unlit. The unit selects this
mode when a valid input signal has been present and no button presses
have been made for 8 seconds. The LEDs around the button illuminate
amber to directly indicate the following frequencies 32, 44.1, 48, 88.2, 96,
The front panel has an INPUT
SELECT button and 7 indicator
LEDS. The button is used to
select the input to be used and
shows the mode of operation of
the unit. The LEDs will indicate,
depending on the mode of
operation, the input selected,