User Manual

User's Guide Fireface UC © RME
43
24. Digital Connections
24.1 ADAT
The ADAT optical input of the Fireface UC is fully compatible with all ADAT optical outputs.
RME's unsurpassed Bitclock PLL prevents clicks and drop outs even in extreme varipitch op-
eration, and guarantees a fast and low jitter lock to the digital input signal. A usual TOSLINK
cable is sufficient for connection. More information on Double Speed (S/MUX) can be found in
chapter 35.4.
ADAT In
Interface for a device sending an ADAT signal to the Fireface UC. Carries the channels 1 to 8.
When receiving a Double Speed signal, this input carries the channels 1 to 4, at Quad Speed
the channels 1 and 2.
ADAT Out
Interface for a device receiving an ADAT signal from the Fireface UC. Transmits channels 1 to
8. When sending a Double Speed signal, this port carries channels 1 to 4, at Quad Speed the
channels 1 and 2.
24.2 SPDIF
The Fireface UC has two SPDIF inputs and outputs. Coaxial and optical can be used simulta-
neously, with different audio signals. Note that the sources have to be synchronous, as the unit
does not have a dedicated sample rate converter.
The optical input automatically switches to SPDIF operation when such a signal is detected.
The audio information is then shown in TotalMix on the first two ADAT channels, In 11 and In
12.
To send out SPDIF from the optical output, select the option Optical – SPDIF in the Settings
dialog. The output signal in TotalMix has to be present on the first ADAT channels, AS 1+2.
The Fireface UC’s inputs accept SPDIF as well as AES/EBU.
To receive 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 connected
to pin 1 of the XLR and the ground
contact of the phono plug.