RME Audio ADI-192 DD, Руководство пользователя

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User's Guide ADI-192 DD © RME
7. Outputs
7.1 AES/EBU
At the rear side of the ADI-192 DD there are four XLR sockets as AES/EBU outputs. Each out-
put is transformer-balanced, ground-free and compatible to all devices with AES/EBU ports.
Connection is accomplished using balanced cables with XLR plugs.
If AES STATE PRO (Professional) is chosen, the output level is almost 5 Volt. If CON (Con-
sumer) is chosen, the output signal will have a channel status compatible to SPDIF. As far as
we know, every SPDIF device should be capable of handling an input signal of up to 5 Volt in-
stead of the usual 0.5 Volt. Nevertheless the output level will be reduced to 2 Volt when CON is
selected.
Connecting devices with coaxial SPDIF
ports to the ADI-192 DD is accomplished by
a simple cable adapter XLR/phono. 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.
Besides the audio data, digital signals in SPDIF or AES/EBU format contain a channel status
coding, which is being used for transmitting further information. The output signal coding of the
ADI-192 DD has been implemented according to AES3-1992 Amendment 4:
•
32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz according to the
current sample rate
•
Audio use
•
No Copyright, Copy permitted
•
Format Consumer or Professional
•
Category General, Generation not indicated
•
2-Channel, No Emphasis or 50/15 µs
•
Single Channel Double Sampling Frequency Mode (Double Wire)
•
Aux Bits Audio use, 24 Bit
•
Origin: A192
Note that most consumer HiFi equipment (with optical or phono SPDIF inputs) will only ac-
cept signals in ‘Consumer’ format!
The status 'Professional' should always be active when sending data to a device with AES/EBU
inputs (when the XLR connectors are used).
If only one AES input is used, the ADI-192 DD automatically activates a distribution mode.
The single stereo signal will be copied to all four AES outputs.
This realizes a useful distribution mode, sending one AES signal to four devices at the same
time (splitter/distributor). The distribution mode is also available when using the front SPDIF
input. Please note that this special function is only active in Single Speed operation, but also
with SRC activated.