User's Guide ADI-8 DD © RME
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13. Connector Pinouts
D-Sub TDIF-1
The 25 pin D-sub connectors are wired according to TDIF-1, version 1.1:
Signal Out
1/2
Out
3/4
Out
5/6
Out
7/8
Out
LRCK
Out
EMPH
Out
FS0
Out
FS1
D-sub
1
2
3
4
5
18
6
19
Signal
In
FS1
In
FS0
In
EMPH
In
LRCK
In
7/8
In
5/6
In
3/4
In
1/2
D-sub
20
8
21
9
10
11
12
13
GND is connected to pins 7, 14, 15, 16, 17, 22, 23, 24, 25.
AES/EBU
The XLR connectors are wired according to AES3-1992:
1 = GND (shield)
2 = Signal
3 = Signal
AES/EBU and SPDIF are biphase modulated signals, therefore polarity doesn't matter. Pins 2
and 3 are neither hot nor cold, they carry the same signal. But as AES3 uses a balanced
transmission they are inverted in polarity.
14. Block Diagram
On the following page, there is a block diagram of the ADI-8 DD. It shows a functional overview
of the device in order to help with questions regarding functions and routing. It has been made
simpler in some points and does not show all possible functions in order to remain understand-
able and overseeable. So, for instance the function of the optical SPDIF output is missing.