Datasheet

ManualsBrandsSTUDIO TECHNOLOGIES ManualsNetwork Audio + VideoModel 44D - Dante to analogue interface

50033-0818, Issue 3

Key Features:

•

Dante® audio-over-Ethernet technology

• Input and output level metering

• Selectable input and output nominal levels

• Excellent audio quality

• GPI/GPO support

• Tone generator mode for REMI and call light applications

• PoE and 12 Vdc powering

• Standard connectors

• Table-top, portable, or optional rack-mount use

Overview

The Model 44D Audio Interface provides a simple yet high-

performance means of interfacing two channels of analog

line-level audio to and from applications that utilize Dante®

audio-over-Ethernet media networking technology. Two

Model 44D units can also provide one-to-one signal paths,

two in each direction, over a standard local area network

(LAN). In addition, the unit supports transport of status

signals or contact closures between Model 44D units and

other compatible products. There are two general-purpose

inputs (GPI) and two general-purpose output (GPO) on

each Model 44D.

A special operating mode allows the Model 44D to serve

as a tone generator rather than an audio interface. When

configured for the tone generator mode 18 kHz and 20 kHz

sine-wave audio signals are available in both the analog

and digital domains.

The Model 44D is a fully professional product that offers

the audio quality, features, and reliability required by 24-

hour, on-air, and commercial applications. The two line-level

audio inputs use standard 3-pin female XLR connectors for

easy interfacing with balanced and unbal

anced sources. The input audio signals are

converted to 24-bit digital and then trans

ported via the Dante interface. Two digital

audio signals arrive into the Model 44D via

the Dante interface and are then converted

to analog. Two 3-pin male XLR connectors

on the Model 44D’s back panel provide bal

anced line-level outputs.

The Model 44D is designed as a bridge, using Dante to link

analog or other Dante interfaces found on devices such

as matrix intercom systems, broadcast routers, and audio

consoles. An Ethernet connection is all that’s required to

make the Model 44D part of a sophisticated, networked

audio system. Dante audio-over-Ethernet has found wide

acceptance as an audio “backbone” due to its ease of

use, high performance, strong interoperability, and wide

adoption by a large number of equipment manufacturers.

The Model 44D is a general-purpose “tool” that helps to

expand Dante’s capabilities to facilities and equipment that

primarily supports signals in the analog domain.

Careful attention to circuit design and component selection

ensures that excellent audio quality is maintained. Exten

sive filtering helps prevent damage or less-than-optimal

performance should DC voltage, ESD (“static”), or strong

RF signals be present on the associated analog signals.

Configuration switches allow several Model 44D operating

parameters to be selected. The nominal audio levels of the

line input and line output functions can be independently

selected. In this way compatibility with SMPTE® and EBU

nominal signal levels is supported. Audio level meters

provide confirmation of system performance during setup

and operation. Two general purpose input and two general

purpose output functions allow support for installer-se

lected applications, including party-line intercom call-light

functions. Two LEDs provide a direct indication of the status

of the GPO functions.

The Model 44D can be powered by Power-over-Ethernet

(PoE) or an external source of 12 volts DC. Standard con

nectors are used for the line inputs and outputs, Ethernet,

GPI/GPO, and DC power interconnections. The Model

Summary of content (5 pages)

PAGE 1
Key Features: • Dante® audio-over-Ethernet technology • Input and output level metering • Selectable input and output nominal levels • Excellent audio quality • GPI/GPO support • Tone generator mode for REMI and call light applications • PoE and 12 Vdc powering • Standard connectors • Table-top, portable, or optional rack-mount use Overview The Model 44D Audio Interface provides a simple yet highperformance means of interfacing two channels of analog line-level audio to and from applications that utilize D
PAGE 2
44D’s enclosure has a “1/2-rack” 1U form factor and weighs less than two pounds, making it well suited for use in portable applications. Alternately, using one of the optional rack-mount front panels, one or two Model 44D units can be mounted in a single space (1U) of a standard 19-inch rack enclosure. Dante Audio-over-Ethernet Audio data is sent to the Model 44D using the Dante audio-over-Ethernet media networking technology. Audio signals with a sample rate of 44.
PAGE 3
General Purpose Inputs and Outputs The Model 44D allows the sending and receiving of status signals using high-frequency audio tones that are included with within the Dante audio channels. When two Model 44D units are interconnected using an Ethernet network and Dante, two status signals will be transported in each direction. Each general purpose input (GPI) is compatible with contact closures provided by equipment such as matrix intercom systems or routers.
PAGE 4
RJ45 connector. While compatible with standard RJ45 plugs, etherCON allows a ruggedized and locking interconnection for harsh or high-reliability environments. The Model 44D’s operating power can be provided by way of the Ethernet interface using the Power-over-Ethernet (PoE) standard. This allows fast and efficient interconnection with the associated data network.
PAGE 5
Tone Generator: Type: sine-wave Frequency: 18 kHz ±350 mHz; 20 kHz ±350 mHz Analog Output Level: +4 dBu, nominal Analog Output Distortion (THD+N): <0.003% Digital Output Level (Dante transmitter (Output)): –20 dBFS Digital Output Distortion (THD+N): <0.0001% Meters: 4 Function: displays level of line inputs and line outputs in dBFS Type: 5-segment LED, modified VU ballistics GPI: 2 Type: logic input, pulled to +3.3 volts DC through 3.