Specifications

Chapter 1: Introduction 7
Chapter 1: Introduction
The Avid Modular I/O system adds flexibility to configuring System 5 audio converters. Three frame types can be fitted with
a variety of I/O modules to meet client requirements. Frame controller, Sync, MADI, Analog Mic/Line, AES/EBU, De-Embedder,
and Dolby modules are available. The table below lists all modules in their categories.
This chapter includes overviews of each frame and how to choose a frame. See each frame’s chapter for installation and other
technical details.
Frame Specification
A Modular I/O configuration comprises modules selected to perform specific functions, and fitted to frames that accommodate
their sync, control, and I/O requirements. Before choosing, installing, or servicing a Modular I/O frame, consider the following
criteria.
Master Sync Source
Each frame must have a master audio sync source module for each sync zone, typically an SY983 Sync HD module. However,
several other I/O modules with a Master mode can be used instead, but not in conjunction with an SY983.
IO93 Double-Sided and IO94 Stagebox frames consist of a single sync zone. The master sync source module must be positioned
in one of four red sync source slots in the rear plane. The IO95 Multi-Zone frame contains five isolated sync zones. Each zone in
use requires its own master sync source module.
Modular I/O System Components
Frame
Frame
Controller
Sync MADI
Analog
Mic/Line
AES/EBU De-embedder Dolby
IO93
Double-Sided
FC972
Remote
SY983 Sync HD
MM935 MADI I/O
(coax)
AD914 4ch
Mic Input
DD915 8ch
AES I/O 110 
HD944 16ch
De-embedder
DD901 Dolby
D/E Decoder
IO94
Stagebox
WC984 4x
Wordclock Out
MM936 MADI I/O
(redundant fiber)
AD920 4ch
Line In
DD916 8ch
AES I/O 75 
DD911 Dolby E
Encoder
IO95
Multi-Zone
DA921 4ch
Line Out
DD912 Dolby
D/D+ Encoder
AD922 4ch
Line In
DA923 4ch
Line Out
To avoid damaging analog circuits, install a master sync source module in a red reserved slot before applying AC power.