User's Guide
ADI-2 FS © RME
9
6.7 Digital Outputs
The ADI-2 has a coaxial and an optical digital output. The button DIG OUT determines the cur-
rent format:
x
ADAT: The optical TOSLINK output operates in ADAT mode. Included support for S/MUX4
enables sample rates up to 192 kHz. The coaxial output continues to send out SPDIF.
x
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/EBU. The same signal is
found at the optical output.
x
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.
To send signals in AES/EBU format, an
adapter cable is required. Pins 2 and 3 of a
female XLR plug are connected individually
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 ADAT optical output of the ADI-2 FS is fully compatible 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 (S/MUX4). All devices compatible to S/MUX can receive
and recombine the ADI-2 FS data into two channels of up to 192 kHz, naturally including all
RME devices with ADAT I/Os.
