iSIS Graham-Patten SoundPals DMIX-41 User manual

SoundPals™
DMIX-41 User Guide
Four channel Digital Mixer

Graham-Patten is a division of
Printing History
SoundPals™DMIX-41 Four Channel Digital Mixer
Rev. N/C
March 2007
Printed in U.S.A.
Part Number 08-2047-00
The information contained in this guide is subject to change without notice or obligation.
Copyrights and Trademarks
© 2005 GRAHAM-PATTEN SYSTEMS, INC.
Contents of this publication may not be reproduced in any form without the written permission of Graham-Patten.
Reproduction or reverse engineering of copyrighted software is prohibited.
FCC Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at your own expense.
Warranty Statement
Graham-Patten warrants that the equipment it manufactures is free from defects in workmanship and materials and
meets applicable published specifications. Equipment that has been operated within published ratings and has not
been subjected to abuse or modification, and which fails because of such defects, will be replaced or repaired at the
Company’s discretion if it is returned, freight prepaid, to Graham-Patten within seven years of receipt.
This warranty supersedes all other Warranties, express or implied. Graham-Patten is not liable for any
consequential damages.
Company Address
GRAHAM-PATTEN SYSTEMS, INC.
119 East McKnight Way, Unit A
Grass Valley, California 95949
Telephone: [phone]
Fax: [phone]
e-mail: [email protected]
World Wide Web: www.gpsys.com

Table of Contents
ii • Table of Contents DMIX-41 User Guide
Table of Contents ii
Introduction 1
What are SoundPals?.............................................................................................................. 1
Documentation Conventions.................................................................................................... 1
Signals and Values .................................................................................................................. 1
Warnings.................................................................................................................................. 1
Unpacking and Inspection ....................................................................................................... 2
Power Supply Note .................................................................................................................. 2
DMIX-41 3
About the DMIX-41 .................................................................................................................. 3
DMIX-41 Installation ................................................................................................................ 6
Connecting Power ............................................................................................................. 6
Connecting Inputs ............................................................................................................. 6
Connecting Outputs........................................................................................................... 6
DMIX-41 Operation.................................................................................................................. 7
Local Operation .................................................................................................................7
AC-3 Operation .................................................................................................................7
DMIX-41 Interconnection .........................................................................................................8
Basic - Mixing Workstation Audio...................................................................................... 8
Basic - Audio Bypass Switch............................................................................................. 9
Advanced - Fade, Mix and Switch................................................................................... 10
DMIX-41 Remote Control ...................................................................................................... 11
Remote Control Connection ............................................................................................ 11
Remote Control Operation .............................................................................................. 12
DMIX-41 Internal Jumpers..................................................................................................... 13
DMIX-41 Troubleshooting...................................................................................................... 14
DMIX-41 Specifications .........................................................................................................15
Audio Specifications ........................................................................................................ 15
Remote Control Specifications ........................................................................................ 15
Environmental Specifications and Dimensions ............................................................... 15
Inside the Module ........................................................................................... 16
In This Section ....................................................................................................................... 16
Before You Begin................................................................................................................... 16
Opening the Module ..............................................................................................................16
Closing the Module ................................................................................................................ 16
External Power ................................................................................................ 17
About Power Supplies ...........................................................................................................17
CE Compliance...................................................................................................................... 17
Portable Power Sources ........................................................................................................ 17
Power Supply Specifications ................................................................................................. 17
Power Supply Sources .......................................................................................................... 18

Introduction
DMIX-41 User Guide Page 1
What are SoundPals?
Each Graham-Patten SoundPals module is essentially a digital audio building block that can be
used independently, or interconnected to perform more advanced mixing and audio processing
functions.
SoundPals can be used in both standalone and system configurations:
•In a “standalone” configuration, each SoundPals module is designed to perform a specific
audio processing function such as ADAT-to-Analog conversion. In this way, each module
functions as a perfect low-cost adjunct to larger mixing consoles (such as the Graham-
Patten D/ESAM series) — for single-purpose processing tasks.
•In a “system” configuration, SoundPals can be linked to form more comprehensive digital
audio tools. For field recording, studio applications, and workstation applications,
SoundPals can be used to seamlessly perform functions that would otherwise require
extensive peripheral gear. Best of all, SoundPals “systems” can be re-configured quickly
and easily — to suit your changing audio production requirements.
All SoundPals modules are extremely compact, rugged, and identical in size for ease of
installation, interconnection, and use. In addition, SoundPals support AES3id. This allows
longer, more robust AES signal distribution using standard coaxial cable. Error free distances of
1000 feet can be attained using inexpensive coaxial cables.
Documentation Conventions
The following documentation conventions are used in this guide:
•Buttons, knobs, connectors, and switches are indicated in bold-faced capital letters. For
example:
Adjust the left GAIN TRIM to …
•Primary sections are listed in bold text, with a line above:
Primary Section
•Secondary sections are listed in bold text, with no line:
Secondary Section
Signals and Values
Note the following important information regarding audio signal level:
•AES3 = Balanced output with 2 channels of digital audio (left and right)
•AES3id = Unbalanced output with 2 channels of digital audio (left and right)
Warnings
Please observe the following important warnings:
•Heed all warnings on the unit and in the instructions.
•Do not use this product in or near water.
•Route power cords and other cables so that they are not likely to be damaged.
Disconnect power before cleaning. Do not use liquid or aerosol cleaners; use only a
damp cloth.

DMIX-41 User Guide
Page 2
Unpacking and Inspection
When you receive your SoundPals modules, inspect the cartons for signs of damage. Contact
your dealer and the shipper immediately if you suspect any damage has occurred during
shipping. Check the contents of each box to be sure that all parts are included. If any items are
missing, contact your dealer immediately.
Power Supply Note
SoundPals are delivered with a power connector only. A separate power supply must be
obtained. Graham-Patten offers several power solutions for both domestic and international
customers. Refer to “External Power” for detailed power specifications for users who wish to
configure their own power source, rather than purchase one from Graham-Patten.

DMIX-41
DMIX-41 User Guide Page 3
About the DMIX-41
The SoundPals DMIX-41 is a four stereo-channel digital sample rate converter and mixer that
mixes up to four, balanced AES inputs down to one balanced or unbalanced AES (or DATS)
output. Optionally, the unit accommodates up to four unbalanced inputs, remote input selection,
and remote timing master selection.
All “enabled” inputs (in any combination) are mixed onto the output bus with unity gain — levels
are not adjusted. Any signal that is not active is automatically muted. In addition, inputs need not
be synchronous if the optional sample rate converters (SRC’s) are installed. Output timing is
derived from the designated master input.
The DMIX-41 offers the following features:
•Optional remote input selection
•Optional remote timing master selection
•20-bit or 24-bit processing
•Active balanced and unbalanced outputs
•Continuous input status display via LED indicators
•Terminating or bridging inputs
•Four balanced AES inputs on XLR connectors, or (optionally) four DATS unbalanced
inputs on BNC connectors
•One AES balanced output (XLR), plus one simultaneous unbalanced output (DATS on
BNC)
•0 (zero) or 4 Sample Rate Converters (SRC’s)
•Optional rack mounting tray (1 RU)
•Compact size, rugged construction
Four different DMIX-41 models are available, per your specific studio or field requirements.
Select between balanced inputs on XLR connectors, or unbalanced inputs on BNC (DATS)
connectors. For both configurations, choose between 0 (zero) or 4 SRC’s (Sample Rate
Converters).
Model Description
A0 0 (zero) SRC’s, balanced inputs (XLR)
A4 4 SRC’s, balanced inputs (XLR)
B0 0 (zero) SRC’s, unbalanced inputs
(BNC)
B4 4 SRC’s, unbalanced inputs (BNC)

DMIX-41 User Guide
Page 4
The figure below illustrates the DMIX-41’s front panel:
DMIX-41 DMIX-41
+6V
MASTER
54
32 6
AES OUT
1
CONTROL
ERROR
1
2
1
2
3
4
3
4
1) AES Balanced Output — provides AES balanced output via XLR connector. Output is
concurrent with the unbalanced output (BNC) — both can be used simultaneously.
2) AES Unbalanced Output — provides AES unbalanced output via BNC. Output is
concurrent with the balanced output (XLR) — both can be used simultaneously.
3) Remote Control — provides remote channel muting, and timing master selection. Refer
to the “DMIX-41 Remote Control” section for details.
4) Indicator LEDs — eight indicators are provided:
ERROR — four red LEDs are provided, one for each input. The following LED conditions
are possible:
•An ERROR LED lights when no signal is applied to the input, or when the signal
is not valid. A non-valid signal exhibits errors such as format violations, bit
errors, low level, or incorrect frequency.
•An ERROR LED blinks slowly when that input has been muted via the remote
control interface.
•When an input ERROR LED is lit (either continuously or blinking), the input signal
is muted.
MASTER — four green LEDs are provided, one for each input. The following LED
conditions are possible:
•A MASTER LED lights continuously when the input signal may be used as the
output timing reference.
•A MASTER LED blinks slowly when that input signal is in use as the output
timing reference.
•A MASTER LED is off when that input has been disabled as a timing master (via
remote control).
5) Power Connector — accepts the power jack from the 6VDC power supply. Refer to
“External Power” for more information regarding external power.
6) Power LED — the large green LED below the power jack lights when power is applied.