Oxygen 5 Digital - User Manual
Version 2.5 - 12/22/2010
Axel Technology srl
www.axeltechnology.com
|
Available I/O rac k
cards
83
8.3 Digital in/output card (optional SRC)
There are four balanced digital inputs and outputs available on each card.
Each RJ45 connector represents a stereo line input and two GPIO’s which can be
connected to the 19” patch panels with a shielded twisted pair (STP) cable.
There is also a card available with built in sample rate converters (SRC).
For each GPIO you can choose, by way of a hardware jumper on de board, between TTL
Input/Output or Photo-MOS relay output see chapter 9.3.1 GPIO TTL/Relay selection
Table 8-3: Digital input/output RJ45 connection
With jumper on the I/O card it is possible to select the impedance for S/P-DIF (75
Ω
) or AES-3 (110
Ω
)
This figures shows the jumper location on the I/O card
Figure 28: Digital S/P-DIF or AES3 selection
Pin Con. Pair Pin name Function
Comment
1
1A
1
+Audio 1 Digital input in-phase
Imp. 110
Ω
/75
Ω
optional SRC:
32..96kHz
2
1B
-Audio 1
Digital input out-phase
3
2A
2
+Audio 2 Digital output in-phase
Imp. 110
Ω
/75
Ω
32, 44.1, 48kHz
6
2B
-Audio 2
Digital output out-phase
5
3A
3
GPIO1a
TTL in/out or relay out, see 9.3.1
4
3B
GPIO1b
7
4A
4
GPIO2a
TTL in/out or relay out, see 9.3.1
8
4B
GPIO2b
S
GND S
Shield
GND
Audio ground and
reference for GP-
In
