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Audio Distribution Amplifier - RB-DDA6A-2P 9
9 RB-DDA6A-2P 6 Way Stereo AES/EBU Digital Distribution Amplifier With
Dual Power Supplies
Introduction
Fig 9-1: RB-DDA6A-2P Front Panel
Power Indicator LEDs
The RB-DDA6A-2P digital distribution amplifier is used for distributing
digital audio data in AES/EBU format, repeating both the audio data and
the status information of the input whilst re-normalising to standard digital
audio levels.
It has a single XLR-3 female AES/EBU audio input which is distributed to 6
XLR-3 male AES/EBU outputs.
Applications include distributing audio from a digital mixing desk to
multiple digital recorders, or feeding multiple studios with an output from
a DAT machine.
It can accept input sample rates in the range of 30kHz - 100kHz, 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
recording.
The unit provides redundancy protection by using two power supply units
that can be supplied from separate mains feeds. The unit automatically load
shares between the two supplies so that if either supply should fail the unit
will continue to work correctly. If both supplies fail the input is connected
directly to output 1.
The condition of the two supplies is indicated on the front panel by two red
LEDs which illuminate to indicate the correct function of the supply. On the
alarm output connector there is a changeover relay to indicate the status
of each supply. This is normally closed to indicate power fail and once the
supply is working correctly the relay activates to make a normally open
contact.
