Service Manual CHAPTER 2 - SYSTEM DESCRIPTION July 24, 2008
SX-48 Page 10
AES2 – Digital I/O with SRC
The AES2 board provides 8 inputs and 8 outputs in AES/EBU format. It also includes Sample Rate
Conversion circuitry, allowing signals of any sample rate to be fed to the SX-48, regardless of its
nominal sampling frequency.
Board Slots
The SX-48 includes 6 slots for I/O boards. They can be filled with any combination of I/O boards
desired by the owner.
Using combinations of the I/O boards, it is possible to configure the SX-48 in many different ways. For
example, it is possible to have 48 digital I/Os or 48 analog inputs or 48 analog outputs or 24 analog
inputs and outputs etc.
For detailed instructions on fitting boards, see the section Fitting and Changing Boards. In particular,
note the section on orientation of boards, because incorrect orientation can cause severe damage to
the unit.
Order of Boards
Any I/O board can go into any slot.
Each slot has 8 MADI channels associated with it. For example, Slot 1 is connected to MADI channels
1 to 8 (both input and output), while Slot 4 is connected MADI channels 25 to 32.
If an AI1 is installed in Slot 1, its 8 analog inputs will connect to MADI outputs 1 to 8, while MADI
inputs 1 to 8 will not be used.
If an AO1 is installed in Slot 1, its 8 analog outputs will connect to MADI inputs 1 to 8, while MADI
outputs 1 to 8 will not be used.
If an AES2 is installed in Slot 1, its 8 AES/EBU inputs will connect to MADI outputs 1 to 8, and its 8
AES/EBU outputs will connect to MADI inputs 1 to 8.
For use in DREAM II systems, please see Running SX-48 in a DREAM II System, below.
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