Outputs; Madi; Aes/Ebu; Outputs 9.1 Madi - RME Audio ADI-642 User Manual

Emphasis
AES/EBU and SPDIF can contain an Emphasis information. Audio signals with Emphasis have
a strong high frequency boost and thus require a high frequency attenuation on playback.
An Emphasis indication gets lost! This information is neither passed on to the MADI output,
nor to any of the AES outputs!

9. Outputs

9.1 MADI

At the rear side of the ADI-642 there are two MADI outputs.
The BNC output is built according to AES10-1991. The output's impedance is 75 Ohm. The
output voltage will be 600 mVpp when terminated with 75 Ohm.
The optical output uses a FDDI (ISO/IEC 9413-3) compatible optical module, according to
AES10-1991. More information can be found in chapter 14.4, MADI Basics.

9.2 AES/EBU

At the rear side of the ADI-642 there are four XLR sockets as AES/EBU outputs. Each output is
transformer-balanced, ground-free and compatible to all devices with AES/EBU ports. Connec-
tion is accomplished using balanced cables with XLR plugs.
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 Professional
• Category General, Generation not indicated
• 2-Channel, No Emphasis
• Aux Bits Audio use, 24 Bit
• Origin: A642
Connecting devices with coaxial SPDIF
ports to the ADI-642 is accomplished by a
simple cable adapter XLR/phono. Pins 2
and 3 of a female XLR plug are con-
nected 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.
Note that most consumer HiFi equipment with phono SPDIF inputs will only accept signals
having a Channel Status 'Consumer' format! In such cases the above adapter cable will
therefore not work.
User's Guide ADI-642 © RME
17