Euphonix DM714, MD704, AM713, MA703 User Manual

Euphonix MADI Converters Manual

AM713 Analog to MADI, MA703 MADI to Analog

DM714 Digital to MADI, MD704 MADI to Digital

Document Revision: 2.1

Release Date: May, 2005

Part Number: 840-08416-02

Euphonix Inc.

220 Portage Ave.
Palo Alto, California 94306
Phone: [phone]
Fax: [phone]
Web: http://www.euphonix.com
e-mail: [e-mail]

In the interest of continued product development, Euphonix Inc. reserves the right to make
improvements in this manual and the products it describes at any time, without notice or
obligation.

System 5, S5, Max Air, PatchNet, eMix, EuCon, R-1, Audio Deck, Studio Hub are trademarks
of Euphonix, Inc.

©2002 Euphonix, Inc. All rights reserved worldwide. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any
language in any form by any means without written permission from Euphonix, Inc.

Euphonix MADI Converters Operation Manual

Table of Contents

List of Figures ....................................................................................................................... vi

Chapter 1: Introduction ...................................................................................................7

1.1 AM713/MA703 .........................................................................................7

1.2 DM714/MD704 .........................................................................................7

1.3 Power On Sequence...................................................................................8

1.4 Safety and Precautions ..............................................................................8

1.4.1 220, 230, 240 VAC Operation ....................................................8

Chapter 2: AM713 and MA703 Converters..........................................................11

2.1 Features....................................................................................................11

2.2 Applications.............................................................................................11

2.3 AM713/MA703 Front Panel....................................................................12

2.4 AM713 Rear Panel ..................................................................................14

2.5 MA703 Rear Panel ..................................................................................16

2.6 Synchronization.......................................................................................18

2.6.1 AM713 ......................................................................................18

2.6.2 MA703 ......................................................................................18

2.7 Specifications ..........................................................................................19

Chapter 3: DM714 and MD704 Converters..........................................................23

3.1 Features....................................................................................................23

3.2 Applications.............................................................................................23

3.3 DM 714/MD704 Front Panel...................................................................24

3.4 DM714 Rear Panel ..................................................................................26

3.5 MD704 Rear Panel ..................................................................................28

3.6 Synchronization.......................................................................................30

3.6.1 DM714 ......................................................................................30

3.6.2 MD704 ......................................................................................30

3.7 Specifications ..........................................................................................31

3.8 DM714: Pinout for Female DB25 Connector .........................................34

3.9 MD704: Pinout for Female DB25 Connector .........................................35

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Euphonix MADI Converters Operation Manual

List of Figures

2-1 AM713 Front Panel ..........................................................................................................12

2-2 AM713 Rear Panel ............................................................................................................14

2-3 MA703 Rear Panel ............................................................................................................16

3-1 DM714 Front Panel ..........................................................................................................24

3-2 DM714 Rear Panel ............................................................................................................26

3-3 MD704 Rear Panel ............................................................................................................28

3-4 DM714 Female DB25 Connector .....................................................................................34

3-5 MD704 Female DB25 Connector .....................................................................................35

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Euphonix MADI Converters Operation Manual

Chapter 1: Introduction

1.1 AM713/MA703

The AM713 and MA703 converters provide MADI conversion to interface to/from
analog equipment such as consoles, tape decks, microphone preamplifiers and other
analog devices. Both converters are two rack spaces high and are housed in a stainless
steel chassis with machined, heavy aluminum front panels.

The AM713 converts incoming analog signals to 24-bit MADI digital signals that capture
the input’s complete dynamic range. In addition to the 24 XLR connectors for the analog
inputs, there are two auxiliary analog inputs (XLR) and two auxiliary digital inputs
(S/PDIF or AES/EBU); only one digital connector can be used at a time.

The MA703 converts incoming MADI signals to 24 analog channels. In addition to the
24 analog outputs, there are also two auxiliary analog outputs (XLR) and two auxiliary
digital outputs (S/PDIF or AES/EBU). Only one digital connector can be used at a time.

1.2 DM714/MD704

The DM714 and MD704 converters provide MADI conversion to interface to/from
digital (AES/EBU) equipment such as digital multi-track recorders, digital audio work­stations, audio routers, and facility patching systems. Both converters are two rack
spaces high and are housed in a stainless steel chassis with machined, heavy aluminum
front panels.

The DM714 converts incoming AES/EBU digital audio to MADI. In addition to the 24
input channels (12 AES/EBU pairs), there are two auxiliary analog inputs (XLR) and
two auxiliary digital inputs (S/PDIF or AES/EBU); only one auxiliary digital connector
can be used at a time. Each main AES/EBU input is automatically evaluated for sample­rate conversion. The incoming sample rate is compared with the internal rate. If they are
the same, no conversion occurs. If the rates differ, sample-rate conversion is activated
and persists until a new input is applied or the internal sample rate changes. The sample­rate conversion range is 32–56 kHz. Sample-rate conversion reduces a 24-bit signal to
20 bits.

The MD704 converts incoming MADI signals to 24 digital output channels (12 AES/
EBU pairs). In addition to the 24 analog outputs, there are also two auxiliary analog out­puts (XLR) and two auxiliary digital outputs (S/PDIF or AES/EBU). The main 24 out­puts can be bit-depth converted from 24 to 20 or 16 bits.

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Euphonix MADI Converters Operation Manual Introduction

1.3 Power On Sequence

We recommend powering up the converters only after verifying the presence of a val­id sync signal. After powering up the converters, the meter LEDs flash briefly and the
Sample Rate and Sample Rate Source LEDs blink as the converter senses the incoming
Sample Rate source and Sample Rate. We recommend monitoring the power-up se­quence to verify the converters have correctly auto-sensed the desired Sample Rate
Source and Sample Rate.

1.4 Safety and Precautions

The AM713, MA703, MD704 and DM714 comply with CE’s EN 60950 Electrical
Safety Standards.

1.4.1 220, 230, 240 VAC Operation

NOTE: Before connecting power to the converters, change the fuse and voltage se-

lector to the appropriate 220/230/240 VAC settings.

The converters preserve their signal quality using linear power supplies that must be
manually switched between 115 and 230 VAC. The units are shipped set for 115 VAC.
Move the red, two-position switch near the power entry module of the converters to the
230 VAC position (down) for 220/230/240 VAC operation.

Each unit uses a 0.630 A fuse for 115 VAC operation. To operate at 220, 230, or
240 VAC, install the spare 0.315 A fuse provided in the power entry module fuse-holder.
To access both the active and the spare fuse:

1. Turn the unit’s power off.

2. Remove the IEC power cable from the power entry module.

3. Use a small screwdriver to open the fuse tray below the electrical inlet.

The active fuse is to the rear of the tray. The spare fuse is in the tray slot closest
to the front. Pull the fuses through the plastic constriction point that holds them
from falling out.

NOTE: Never disconnect the safety ground to the converters.

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Euphonix MADI Converters Operation Manual Introduction

Power Cord Requirements

The converters are supplied with North American IEC power cords. If this cord is
changed to allow a different plug configuration, it is the responsibility of the user to se­lect an approved power cord with proper construction material, current capacity, flexi­bility, and strength characteristics.

Cooling

We strongly recommend providing adequate ventilation to the converters, particularly
when installed in a rack. The AM713 and MA703 converters in particular should have
space left above and below every two units so heat can properly dissipate.

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Euphonix MADI Converters Operation Manual Introduction

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Euphonix MADI Converters Operation Manual

Chapter 2: AM713 and MA703 Converters

2.1 Features

Professional grade audio conversion is accomplished utilizing 128 times over-sam­pled noise-shaped delta-sigma techniques. The analog to digital conversion em­ploys a multi-bit modular architecture while the digital to analog conversion
employs a single-bit modulator architecture. Low-jitter reference clocks are provid­ed utilizing digital PLL techniques with VCXO and VCO oscillators.

The analog inputs and outputs can be calibrated from the front panel of each unit. Four
segment LEDs on the front panel monitor signal level. LED meter segments indicate

-42, -18, -6 (green) and -0.005 dBFS (red).

AES/EBU and Word Clock external sync inputs on both units provide synchroniza­tion to digital systems. Sample Rate Source and Sample Rate are automatically sensed
by both units. Supported sample rates include 44.1, 48, 88.2, and 96 kHz. In addition,
pull-up and pull-down rates for the standard sample rates, as well as custom sample
rates are available.

2.2 Applications

In addition to their standard use in a Euphonix digital system, the AM713 and MA703
can be used as stand-alone converters when 24, 48, or more channels of analog-to­MADI and/or MADI-to-analog conversion is necessary (i.e., interfacing an analog tape
deck to a digital mixer). When used with the Euphonix SH612 Studio Hub, this is a
powerful conversion and MADI routing system that can be used to interface between
an analog console and an otherwise all-digital facility (i.e., TV broadcast facility).

NOTE: MADI cables can be extended to 50 m (164 ft), allowing remote location of the

converters.

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Euphonix MADI Converters Operation Manual AM713 and MA703 Converters

2.3 AM713/MA703 Front Panel

This section discusses both front panels and notes their few differences.

Figure 2-1 AM713 Front Panel

Signal Strength LEDs: Each of the 28 channels has a four-segment LED that repre­sents the following signal levels: -42 dB, -18 dB, -6 dB (green), -0.05 dB (red).

Trim Pots Access: Three trim pots adjust the maximum analog input level of channels
1–8, 9–16, and 17–24 in 2-dB steps between +12 and +26 dBu.

SR Conv: This indicates sample-rate conversion activity on the auxiliary digital inputs.

Sample Rate LEDs: These LEDs indicate the sample rate to which the converter is cur-

rently locked. Sample rates are auto-sensed but can be manually selected on the
AM713. Supported sample rates are 96 kHz, 88.2 kHz, 48 kHz, 44.1 kHz, and Custom
rates from external sources.

Sample Rate Source LEDs: These LEDs indicate the format of the Sample Rate
Source to which the converter is currently locked. Sample Rate Source can be auto­sensed or manually selected. If an external source is not detected, the AM713 reverts to
Internal sync; the MA703 mutes its outputs. If a manually selected source is not present,
the Sample Rate Source indicator blinks.

• AES: Sample Rate locked to AES Input.

• Word: Sample Rate locked to Word Clock Input.

• Internal (AM713 only): Sample Rate locked to its own internal crystal.

• MADI (MA703 only): Sample Rate locked to MADI.

• Auto: Sample Rate Source has been auto-sensed.

These LEDs appear in the same order in which signals are tested for their presence.
This detection procedure occurs when the converters are powered on. The Sample Rate
(AM713 only) and Sample Rate Source can also be selected manually.

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Euphonix MADI Converters Operation Manual AM713 and MA703 Converters

Manual Selection Buttons: The button below each Sample Rate LED row manually
selects the sample rate. The AM713 also allows manual selection of the Sample Rate
Source.

Power Switch: On/Off switch.

NOTE: There are no user-serviceable parts in the converters.

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