15
Owner’s Manual
Owner
’s Manual
24. DUAL WIRE/SINGLE WIRE Switch
The original AES/EBU specifi cation (IEC958 Type 1)
provides for carrying two channels of digital audio at
resolutions up to 24-bit at 48 kHz. When higher sam-
pling rates became possible, two methods were devel-
oped to transmit the digital audio at the higher sample
rates—double-fast and double-wide.
The double-fast method (single wire) clocks the
digital I/O port at twice the speed to get twice the infor-
mation through, providing support for resolutions up to
24-bit at 96 kHz.
The double-wide method (dual wire) transmits one
channel of digital audio instead of two channels through
a single digital I/O port, again providing support for
resolutions up to 24-bit at 96 kHz.
This presents a problem when interconnecting digital
audio equipment. Devices using the double-fast method
can’t talk to devices using the double-wide method.
Remember the old Beta vs. VHS format wars? Maybe
not. Well, the Onyx 800R has solved this dilemma with
the fl ip of a switch! Here’s how it works:
At sampling rates up to 48 kHz:
The position of the
DUAL WIRE/SINGLE WIRE switch doesn’t matter. Two
channels of digital audio are transmitted on a single wire
(one 3-pin XLR) as specifi ed by the AES/EBU standard.
At sampling rates of 88.2 kHz through 192 kHz:
When
connecting to devices that use the double-fast method,
set the switch to the SINGLE WIRE position. This
transmits two channels on a single wire (3-pin XLR) at
twice the speed (88.2/96 kHz) or four times the speed
(176.4/192 kHz). When connecting to devices that use
the double-wide method, set the switch to the DUAL
WIRE position. This transmits one channel on one wire
(one 3-pin XLR) at normal speed (88.2/96 kHz) or twice
the speed (176.4/192 kHz), but using twice the band-
width. In the DUAL WIRE position at these sampling
rates, only channels 1-4 are available.
Single Wire
(Two-Channel)
@ 44.1/48 kHz (1x)
CH
1-2
CH
3-4
CH
5-6
CH
7-8
Single Wire
(Two-Channel)
(Double-Fast)
@ 88.2/96 kHz (2x)
@ 176.4/192 kHz (4x)
CH
1-2
CH
3-4
CH
5-6
CH
7-8
Dual Wire
(Single-Channel)
(Double-Wide)
@ 88.2/96 kHz (1x)
@ 176.4/192 kHz (2x)
CH
1
CH
2
CH
3
CH
4
Check the owner’s manual for the device you are con-
necting to the Onyx 800R, to fi nd out which method it
supports.
Note:
The analog and optical outputs are not affected
by the AES/EBU OR S/PDIF OUT settings.
25. Power Receptacle
This is a standard 3-prong IEC power connector.
Connect the detachable linecord (included in the box
with your Onyx 800R) to the power receptacle, and plug
the other end of the linecord into an AC outlet. The
Onyx 800R 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.