Operation Manual

DL452 digital I/O module 31

DL451 Modular I/O

Operator Manual

DL452 digital I/O module

The DL452 digital I/O module provides four (stereo) AES/EBU inputs and outputs. Its

rear panel houses these I/Os in four pairs. Each input has a check and a sync LED and

each output has a check and a mute LED.

Each AES/EBU input can run at sample rates up to 96kHz (44.1Hz, 48kHz, 88.2kHz and

96kHz) using a sample rate converter (SRC). If the digital input is synchronous with

the system clocks, the SRC can be bypassed to remove approximately 1ms of delay,

which is inherent in the sample rate conversion process.

Each AES/EBU output can also run at sample rates up to 96kHz by using an (SRC).

There are two potential clock sources for the digital outputs: the system and the

coinciding digital input. When using the system to drive the digital outputs, the output

SRC is bypassed and the sample rate of the output is matched to the system. When the

digital input clocks are used to drive the digital outputs, the SRC is enabled and the

audio output is converted from the sample rate of the system to the sample rate of the

digital input.

Item Description

1 Four pairs of digital AES3 (AES/EBU) XLR inputs and outputs.

2 Green check LED illuminates to indicate when a channel is selected on a

console. These are controlled by the console and used as a visual aid to

locate specific connectors.

3 Red sync LED illuminates to indicate that a valid AES3 connection is

present on the digital input.

4 Red Mute LED illuminates to indicate channel is muted.