17
Owner’s Manual
Owner’
s Manual
21. S/PDIF IN/OUT
These are RCA connectors that send and receive two
channels of digital audio in the S/PDIF (
S
ony/
P
hilips
D
igital
I
nter
f
ace) format.
S/PDIF OUT transmits two-channels of digital audio,
which appear as outputs 9 and 10 in the Onyx 400F
Console and in the DAW software application.
S/PDIF IN receives two-channels of digital audio, and
appears as inputs 9 and 10 in the Onyx 400F Console
and in the DAW software application.
The S/PDIF I/O on the Onyx 400F sup-
ports sample rates up to 192 kHz. This
means that all ten channels can be
used, even at the highest sample rate
supported by the Onyx 400F!
Note:
Transferring digital audio over a cable generates
EMI (electromagnetic interference) around the cable.
Use high-quality 75-ohm coaxial cable for the S/PDIF
connections to minimize the EMI noise radiated around
the cable.
Tip:
A 75-ohm composite video cable can be used for a
S/PDIF connection.
In general, the shorter the cable length, the less
effect it has on the quality of the signal. The maximum
recommended length for a S/PDIF cable is limited to
10 meters (about 32 feet).
Note:
Strictly speaking, S/PDIF is limited to 20-bits
because four bits are reserved for “user bits.” However,
in the Onyx 400F, the four user bits are used for digital
audio and 24-bits are transmitted (this is an accepted
optional implementation of S/PDIF).
22. Power Receptacle
This is a standard 3-prong IEC power connector.
Connect the detachable linecord (included in the box
with your Onyx 400F) to the power receptacle, and plug
the other end of the linecord into an AC outlet. The
Onyx 400F has a universal power supply that can accept
any AC voltage ranging from 100 VAC to 240 VAC. No
need for voltage select switches. It will work virtually
anywhere in the world. That’s why we call it a “Planet-
Earth” power supply! This also means that it is less
susceptible to voltage sags or spikes, providing greater
electromagnetic isolation and better protection against
AC line noise.
