TerraTec EWS88 MT Manual page 60

When switching between input sources, you are presented with two options:
1. ADAT IN – S/PDIF co-axial
The optical TOS-link input can receive ADAT signals, while the co-axial S/PDIF input is also
available.
ADAT On
Coaxial - S/PDIF
Optical Digital In
Coaxial Digital In
Both signals can be auditioned and processed simultaneously (ADAT- and co-axial S/PDIF) ,
but only one can receive the clock signal. "Clock Source" allows you to chose, which input is to
be used for this purpose.
Example: The co-axial input is connected to a DAT-recorder and the optical input is connected
to a mixing desk with ADAT interface. The ClockSource is provided by "ADAT". The mixer is the
master and set to 44.1kHz. As the DAT-recorder plays with a sampling-rate of 48kHz the signal
will be distorted. Even when the DAT-recorder is set to 44.1kHz, the signal is still not
synchronized with the clock provided by the mixing desk, and the signal is still distorted (even
though this is hardly audible).
2. ADAT Off – S/PDIF Optical
As the TOS-Link interface can transmit S/PDIF signals and the EWS88 D can only process one
S/PDIF input, the co-axial input will not be available here and the Clock-source is set to
S/PDIF input.
ADAT Off
Optical - S/PDIF
Optical Digital In
Coaxial Digital In
If the MasterClock was set to internal synchronization, or if the card is the "Slave" in a
Master/Slave-mode, the ClockSource setting will have no impact at all.
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EWS Engine
ADAT In
Clock Source
Clock In
S/PDIF In
EWS Engine
ADAT In
Clock Source
Clock In
S/PDIF In
AudioSystem EWS88