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7.5 Digital Outputs
The ADI-2 has a coaxial and an optical digital output. The key OUTPUT sets the format:
• ADAT: The optical TOSLINK output operates in ADAT mode. Included support for Sample
Split (S/MUX) enables sample rates up to 96 kHz.
• PRO: The output signal carries the Channel Status Professional. The physical output level at
the RCA connector is raised, making the signal compatible to AES-3 and AES/EBU. The
same signal is found at the optical output.
• CON: The output signal carries the Channel Status Consumer. The physical output level at
the RCA connector is lowered. The same signal is found at the optical output.
In SPDIF/AES mode, identical signals are available at both the optical and the coaxial output.
Therefore up to two devices can be connected, sending the same data to two different devices
(splitter).
To send signals in AES/EBU format, an
adapter cable is required. Pins 2 and 3 of a
female XLR plug are connected individu-
ally to the two pins of a phono plug. The
cable shielding is only connected to pin 1
of the XLR - not to the phono plug.
The ground-free design, with transformers for digital inputs and outputs, offers a trouble-free
connection of all devices along with perfect hum rejection.
The optical SPDIF output can used as ADAT output (OUTPUT – ADAT). The coaxial output
continues to operate as AES/SPDIF output. The ADAT optical output of the ADI-2 is fully com-
patible to all ADAT optical inputs. A usual TOSLINK cable is sufficient for connection.
SPDIF Double/Quad Speed
Both the coaxial and optical output support all sample rates between 32 and 192 kHz directly.
They operate in the so called Single Wire mode.
ADAT Double/Quad Speed
At sample rates above 48 kHz (Double Speed) ADAT uses Sample Multiplexing (S/MUX) to be
able to operate at up to 192 kHz. The data of the channels 1 and 2 will be transmitted using
channels 1/2 and 3/4 (S/MUX) or 1 to 8 (SMUX/4). All devices compatible to S/MUX can receive
and recombine the ADI-2's data into two channels 96 kHz, like the Hammerfall, HDSP and ADI-
8 series from RME.
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User's Guide ADI-2 © RME
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