SoundPals User's Guide - Interstage · User's Guide Volume 2 interstage ... Power Supply Note ......

SoundPals™

User's GuideVolume 2

interstagePhistersvej 31, 2900 Hellerup, Danmark

Telefon 3946 0000, fax 3946 0040www.interstage.dk

- pro audio with a smile

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Printing HistorySoundPals™ User’s Guide Volume 2 • Rev. A • May 1998 • Printed in U.S.A.Part Number 08-2023-00 • The information contained in this guide is subjectto change without notice or obligation.

Copyrights and Trademarks© 1998 GRAHAM-PATTEN SYSTEMS, INC.

Contents of this publication may not be reproduced in any form without thewritten permission of Graham-Patten. Reproduction or reverse engineeringof copyrighted software is prohibited.

• ADAT is a registered trademark of Alesis Corporation, Los Angeles, CA.

FCC ComplianceThis equipment has been tested and found to comply with the limits for aClass A digital device pursuant to Part 15 of the FCC Rules. These limits aredesigned to provide reasonable protection against harmful interference whenthe equipment is operated in a commercial environment. This equipmentgenerates, uses, and can radiate radio frequency energy and, if not installedand used in accordance with the instruction manual, may cause harmfulinterference to radio communications. Operation of this equipment in aresidential area is likely to cause harmful interference in which case the userwill be required to correct the interference at his own expense.

Warranty StatementGraham-Patten warrants that the equipment it manufactures is free fromdefects in workmanship and materials and meets applicable publishedspecifications. Equipment that has been operated within published ratings andhas not been subjected to abuse or modification, and which fails because ofsuch defects, will be replaced or repaired at the Company’s discretion if it isreturned, freight prepaid, to Graham-Patten within 180 days of receipt.

This warranty supersedes all other Warranties, express or implied. Graham-Patten is not liable for any consequential damages.

NOTE Filling out and returning the warranty registration card willextend your SoundPals warranty to one year.

Company Address

GRAHAM-PATTEN SYSTEMS, INC.P.O. Box 1960

Grass Valley, California 95945Telephone: (800) 422-6662, (530) 273-

8412Fax: (530) 273-7458

e-mail: [email protected] Wide Web: http://www.gpsys.com

SoundPals User's Guide Table of Contents • i

Table of Contents

Introduction 1About This Guide......................................................................................1What are SoundPals .................................................................................2Documentation Conventions ..................................................................4Documentation Terms ..............................................................................4Abbreviations............................................................................................5Signals and Values ....................................................................................5Warnings....................................................................................................5AES Reference Looping...........................................................................6Unpacking and Inspection.......................................................................6Power Supply Note ...................................................................................6

ADAT-1 7About the ADAT-1...................................................................................7ADAT-1 Installation...............................................................................10

Connecting Power...........................................................................10Connecting Analog Inputs ............................................................10Connecting AES/Word Clock Reference Input..........................10Connecting the ADAT Output .....................................................11

ADAT-1 Operation .................................................................................12Using the Input Gain Controls ......................................................12Setting the Sample Frequency.......................................................12

ADAT-1 Interconnection.......................................................................13ADAT-1 Internal Jumpers......................................................................15ADAT-1 Troubleshooting.....................................................................16ADAT-1 Specifications..........................................................................17

Audio Specifications ......................................................................17Environmental Specifications and Dimensions ..........................18

ii • Table of Contents SoundPals User's Guide

Channel Routing..............................................................................18

SoundPals User's Guide Table of Contents • iii

ADAT-2 19About the ADAT-2.................................................................................19ADAT-2 Installation...............................................................................22

Connecting Power...........................................................................22Connecting the ADAT Input ........................................................22Connecting AES/Word Clock Reference Output.......................22Connecting Analog Outputs .........................................................22

ADAT-2 Operation .................................................................................23Using the Gain Controls .................................................................23Selecting a Monitoring Pair ...........................................................23Using the Headphone Monitor.....................................................23


Audio Specifications ......................................................................29Environmental Specifications and Dimensions ..........................30Channel Routing..............................................................................30


Connecting Power...........................................................................35Connecting Digital Inputs..............................................................35Connecting the ADAT Output .....................................................36

ADAT-3 Operation .................................................................................37Selecting Sync .................................................................................37Timing Master Priority Control.....................................................39

ADAT-3 Remote Control.......................................................................40Remote Control Connection ..........................................................40Remote Control Operation .............................................................41Remote Control Specifications......................................................42



iv • Table of Contents SoundPals User's Guide


Connecting Power...........................................................................54Connecting the ADAT Input ........................................................54Connecting AES Outputs ..............................................................54

ADAT-4 Operation .................................................................................55ADAT-4 Interconnection.......................................................................56ADAT-4 Internal Jumpers......................................................................58ADAT-4 Troubleshooting.....................................................................60ADAT-4 Specifications..........................................................................61


Appendix A. Inside the Module 63In This Appendix.....................................................................................63Before You Begin ....................................................................................64Opening The Module .............................................................................65Closing The Module ...............................................................................66

Appendix B. External Power 67About Power Supplies............................................................................67CE Compliance.........................................................................................67Portable Power Sources..........................................................................67Power Supply Specifications.................................................................68Power Supply Sources............................................................................68

Appendix C. Rack Tray 69In This Appendix.....................................................................................69

Appendix D. The ADAT Standard 71In This Appendix.....................................................................................71Channel Coding Method........................................................................71Data Content Transmitted......................................................................71Data Detail................................................................................................72Synchronization.......................................................................................73

Index 75

SoundPals User's Guide Table of Contents • v

vi • Table of Contents SoundPals User's Guide

SoundPals User's Guide Introduction • 1

Introduction

About This Guide

This guide provides installation and operating instructions for thesecond set of Graham-Patten’s SoundPals modular digital audioprocessing products. The following chapters are included:

• The “Introduction” chapter describes the guide and introducesthe SoundPals products.

• The “ADAT-1” chapter provides detailed information on theADAT-1 Analog-to-ADAT® Converter.

• The “ADAT-2” chapter describes the ADAT-2 ADAT-to-analog converter.

• The “ADAT-3” chapter describes the ADAT-3 AES-to-ADATconverter.

• The “ADAT-4” chapter provides details on the ADAT-4ADAT-to-AES converter.

• Appendix A, “Inside The Module” provides instructions foropening and closing all SoundPals modules.

• Appendix B, “External Power” provides generic power supplyinformation for all SoundPals modules.

• Appendix C, “Rack Tray” provides instructions for installingSoundPals modules in the optional Rack Tray.

• Appendix D, “The ADAT Standard” provides details of theAlesis ADAT transmission standard.

A comprehensive index is also provided for your reference.

2 • Introduction SoundPals User's Guide

For simplicity and convenience in locating information in this guide,each SoundPals chapter follows the same basic outline:

• Product Description• Installation• Operation• Interconnection• Remote Control (if applicable)• Internal Jumpers• Troubleshooting• Specifications

What are SoundPals

Each Graham-Patten SoundPals module is essentially a digital audiobuilding block that can be used independently, or interconnected toperform more advanced mixing and audio processing functions.

The following SoundPals modules are described in this guide:

• The ADAT-1 is an analog-to-ADAT converter that digitizeseight analog audio inputs and combines them into a single 8-channel ADAT data stream on optical fiber. The unit isjumper-selectable between 44.1 kHz or 48 kHz, and cansynchronize to an external AES reference or word clock at 32-50 kHz sampling rate.

• The ADAT-2 is an ADAT-to-analog converter that separates asingle 8-channel ADAT data stream on optical fiber intoindividual signals, and converts them to eight balanced analogaudio outputs.

• The ADAT-3 is an AES-to-ADAT converter that combinesfour AES input pairs into a single 8-channel ADAT data streamon optical fiber. Two groups of models are available: “A”models have AES3 inputs (XLR), and “B” models haveAES3ID inputs (BNC). Each group, in turn, offers threevariants: zero, two or four sample rate converters.

• The ADAT-4 is an ADAT-to-AES converter that separates asingle 8-channel ADAT data stream on optical fiber into 4 AESoutput audio pairs, on either balanced cable or coaxial cable.Two models are available: the “A” model with AES3 outputs(XLR), and the “B” with AES3ID outputs (BNC).


SoundPals can be used in both standalone and system configurations:

• In a “standalone” configuration, each SoundPals module isdesigned to perform a specific audio processing function suchas ADAT-to-Analog conversion. In this way, each modulefunctions as a perfect low-cost adjunct to larger mixingconsoles (such as the Graham-Patten D/ESAM series) — forsingle-purpose processing tasks.

• In a “system” configuration, SoundPals can be linked to formmore comprehensive digital audio tools. For field recording,studio applications and workstation applications, SoundPalscan be used to seamlessly perform functions that wouldotherwise 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 insize for ease of installation, interconnection, and use. In addition,SoundPals support AES3ID. This allows longer, more robust AESsignal distribution using standard coaxial cable. Error free distances of1000 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 inbold-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

Documentation Terms

The following documentation terms are used throughout this guide:

• “Input” refers to a SoundPals module input, either analog,digital, or ADAT. An analog input is a single monophonictrack from an analog audio source; a digital input representstwo tracks (stereo, left and right) from a digital audio source.

• “Output” refers to a SoundPals audio output, either analog,digital, or ADAT. An analog output is a single monophonictrack; a digital output represents two tracks (stereo, left andright).

• “Source” refers to a monophonic or stereo device (analog ordigital) that is capable of generating an audio signal. Typicalsources are tape machines, audio mixers, and microphones.

• “Channel” refers to the specific left or right portion of thestereo audio signal (digital or analog).

• “Unity Gain” means that the audio output is equal to the input.The signal is not adjusted, and simply passed through.

• “Gain Controls” are used to make level adjustments.


Abbreviations

The following abbreviations are used throughout this guide:

Abbreviation Description

AES Audio Engineering Society

ADAT Alesis Digital Audio Tape

ATR Audio Tape Recorder

DA Distribution Amplifier

DTR Digital Tape Recorder

GPS Graham-Patten Systems

Pot Potentiometer

SRC Sample Rate Converter

VTR Video Tape Recorder

Signals and Values

Note the following important information regarding signals and values:

• AES3 signals are balanced, 2–7 Vp-p at 110 Ω and use XLRconnectors.

• AES3ID signals are unbalanced, 1 Vp-p at 75 Ω and use BNCconnectors.

• 0 dBu = 0.778 Vrms• Word Clock = 5 Vp-p square wave at the sampling frequency

(32-50 kHz). One edge of the square wave is used as thesampling reference.

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 notuse liquid or aerosol cleaners; use only a damp cloth.


AES Reference Looping

Looping of the AES reference signal between different SoundPalsshould only be attempted when they are within approximately 3 feet ofeach other. Custom built Y cables (for AES3 signals) or BNC “T”adapters (for AES3ID signals) must be used for signal looping.

Unpacking and Inspection

When you receive your SoundPals modules, inspect the cartons forsigns of damage. Contact your dealer and the shipper immediately ifyou suspect any damage has occurred during shipping. Check thecontents of each box to be sure that all parts are included. If any itemsare missing, contact your dealer immediately.

NOTE Remember that filling out and returning the warrantyregistration card will extend your SoundPalswarranty from 180 days to one year.

Power Supply Note

SoundPals are delivered with a power connector only. A separatepower solution must be obtained. Graham-Patten offers several powersolutions for both domestic and international customers. Refer toAppendix B, “External Power,” for detailed power specifications forusers who wish to configure their own power solutions, rather thanpurchase one from Graham-Patten.

SoundPals User's Guide ADAT-1 • 7

ADAT-1

About the ADAT-1

The SoundPals ADAT-1 is a 20-bit analog-to-ADAT converter thatdigitizes eight analog audio inputs and combines them into a single 8-channel ADAT data stream on optical fiber. Both audio sampling andthe ADAT output can be internally referenced, or synchronized to aword clock (or to an AES3-ID signal fed to the reference input).

The unit offers the following features:

• 20-bit accuracy for all A/D conversion• ¼" TRS jack input connectors• Individual analog input level trims (8 total)• Individual analog LED level indicators• Jumper-selectable internal reference, 44.1 kHz or 48 kHz• Optional rack mounting tray (1 RU)• Compact size, rugged construction• AES or word clock reference

The ADAT-1 can synchronize to an external AES reference or wordclock at 32-50 kHz sampling rate. When no external reference isprovided, the unit runs at the default frequency.

NOTE Refer to the “ADAT-1 Internal Jumpers” section forinformation on selecting the reference frequency.

8 • ADAT-1 SoundPals User's Guide

The figure below illustrates the ADAT-1’s front panel:A

DA

T-1

AD

AT-

1

PWREXTREF

5

0

-3

-20

-60

IN 1/2 IN 3/4 IN 5/6 IN 7/8

2

1

3

0

-3

-20

-60

-20

44.1

48

6

4

1) Meter Scale — the printed label corresponds to the adjacentLEDs, with indications of −60 dBFS, −20 dBFS, −3 dBFS and0 dBFS. A similar scale appears beside inputs 5/6.

2) Input Gain Trims, Channels 1/2 — two recessed multi-turnpots adjust input channels 1 and 2, respectively. Similar pairsof gain trims are provided for input channels 3/4, 5/6, and 7/8.

3) Input Meters, Channels 1/2 — two 4-LED peak signal metersdisplay input levels on channels 1 and 2, respectively. Whenproperly adjusted, the following levels are indicated:

• – 60 dB: signal present• – 20 dB: normal digital reference level• – 3 dB: approaching clipping• 0 dB: A/D converter is clipping

Similar pairs are provided for inputs 3/4, 5/6, and 7/8.

4) Internal Reference LEDs — two LEDs indicate the internalreference frequency (selected via internal jumper).

• 44.1: lights when 44.1 kHz is the reference.• 48: lights when 48 kHz is the reference.

When either LED is lit, EXT REF is off. Refer to the “ADAT-1Internal Jumpers” section for information on selecting theinternal reference frequency.

5) EXT REF — the green External Reference LED lights whenthe ADAT-1 is locked to an external reference.

NOTE The LED above EXT REF has no function.


6) PWR — the green Power LED lights when power is applied.

The figure below illustrates the ADAT-1’s rear panel:

AES/WCLKREF IN

MA

DE

IN T

HE

US

A

+6V

700mA

ADATOUT

IN 7

IN 8

IN 5

IN 6

IN 3

IN 4

IN 1

IN 2

2

4

3

1

1) Power Connector — accepts the power jack from the 6 VDCpower supply. Please note the printed power rating below theconnector (700 mA). Refer to Appendix B for moreinformation regarding external power.

2) AES/WCLK REF IN — the AES/Word Clock ReferenceInput accepts either AES3ID or word clock. Internal logicdistinguishes between the two, and uses the source (ifpresent) in preference to the internal crystal oscillator. Theinput can be either terminating (75Ω) or bridging.

• Use 75Ω for AES only.• Use bridging for word clock (this is the default

configuration as shipped).

3) ADAT OUT — the optical output is a standard ADAT signalusing plastic fiber with a maximum range of 1 meter. Data islocked to the reference input or the internal oscillator. As aprecaution, if no ADAT cable is connected, insert the plug’scap to prevent dust from getting into the optical interface.

4) Analog Inputs 1 through 8 — all inputs are arranged inleft/right pairs (e.g., IN 1/IN 2). Each analog audio inputaccepts balanced or unbalanced signals on standard TRS (Tip,Ring, Sleeve) ¼" phone jacks. All inputs are high impedance,and each has a corresponding gain trim and 4-LED meter onthe front panel. Conversion to digital uses 20-bit resolution.


ADAT-1 Installation

This section provides instructions for connecting power, inputs, andthe ADAT output.

NOTE For information on rack mounting the ADAT-1 withthe optional rack tray, refer to Appendix C.

Connecting Power

Plug a 6 VDC power supply (rated at 700 mA or greater) into theappropriate voltage outlet for your specific country, and connect theend of the cord into the ADAT-1 jack marked +6V. Secure the lockingring finger tight. The green PWR LED lights when power is applied.

Connecting Analog Inputs

Connect up to four pairs of analog inputs to the desired pair of rearconnectors (e.g., IN 1/IN 2).

• Balanced sources are connected to tip (+) and ring (–) with thesleeve grounded.

• Unbalanced sources are connected to tip (+) with ring (–) andsleeve grounded.

Refer to the “ADAT-1 Specifications” section for a table of ADAT-1channel routing. Refer to the “ADAT-1 Operation” section forinstructions on correctly adjusting input level.

Connecting AES/Word Clock Reference Input

The ADAT-1 can be synchronized to an alternate frequency (from thedefault frequency) by connecting a valid AES reference signal to theAES/WCLK REF IN connector. The EXT REF LED on the front panellights when a valid reference signal is applied.

To phase lock the unit’s sample frequency to a reference, connect areference signal (between 30-50 kHz sampling rate) to the AES/WCLKREF IN connector. The ADAT signal output will now phase-lock tothe incoming reference — independent of the selected referencefrequency.


Note that the AES/WCLK REF IN input is normally bridging, and maybe terminated internally with 75 Ω. When it is necessary to loopreference to several SoundPals, the signal must be terminated onlyonce, and always at the last unit in the chain.

Refer to the “ADAT-1 Internal Jumpers” section for information onchanging the input from terminating to bridging, and selecting theinternal reference frequency.

Connecting the ADAT Output

The ADAT optical output combines the eight audio signals withsynchronization words, auxiliary data bits (currently all zeros) and clockextraction bits to conform to the ADAT format. Using an approved 1-meter (or less) ADAT cable, connect the ADAT-1 to the desireddestination device.


ADAT-1 Operation

This section provides instructions for using the analog input gaincontrols and setting the sample frequency. Refer to the “ADAT-1Specifications” section for a table of ADAT-1 channel routing.

Using the Input Gain Controls

For setting the left and right channel analog input levels, each input hasits own level adjustment on the front panel. Inputs are factory-set for+4 dBu at -20 dBFS. Other levels can be set by using the followingalignment procedure:

To align the left and right analog outputs:

1. Connect a reference analog tone generator to a pair of inputconnectors (e.g. IN 1/IN 2).

2. Turn on the reference tone generator, and adjust it to the levelthat you want to correspond to −− 20 dB below digital clipping.

3. While watching the ADAT-1’s front panel Level IndicatorLEDs, adjust the corresponding Input Gain Trims — until the−− 20 dB LED just comes on.

This setting provides 20 dB of headroom, based on the selected analoginput reference level.

Setting the Sample Frequency

Refer to the “Connecting AES/Word Clock Reference Input” sectionfor instructions on changing the ADAT-1’s sample frequency (if youwant it to differ from the unit’s default frequency (either 44.1 kHz or 48

ADAT-1 Internal Jumpers” section for informationon selecting the internal reference frequency.


ADAT-1 Interconnection

This section provides two ADAT-1 interconnection diagrams.

• Connecting to a Workstation

In this application, four pairs of analog sources are connectedto the ADAT-1. The ADAT-1’s optical output is connected toa workstation for additional audio processing, and theworkstation’s ADAT output is connected to an ADAT-2 forconversion back to analog. Note that the ADAT-2’s referenceoutput is used to lock the ADAT-1’s reference input.

Facility Routing Switcher(Analog)

Analog ATR

Workstation

SoundPals ADAT-1

Analog In 1Analog In 2

PWR

AES In / Word Clock In

ADAT Out

Analog In 3

Analog In 4



ADATOut

AnalogOutputs

SoundPals ADAT-2

Analog Out 1Analog Out 2

PWR

AES Out / Word Clock Out

ADAT In




CD Player (Analog Out)

Analog VTR


• Connecting to a ADAT Recorder

In this application, four pairs of analog sources are connectedto the ADAT-1's inputs. The ADAT-1’s optical output isconnected to an ADAT recorder, and the recorder’s ADAToutput is then connected to an ADAT-4 for conversion to AESdigital. Note that the ADAT-4’s reference output is used tolock the ADAT-1’s reference input.

Facility Routing Switcher(Analog)

Analog ATR

ADAT Recorder

ADATOut

DigitalOutputs

SoundPals ADAT-1


PWR


ADAT Out

Analog In 3

Analog In 4



SoundPals ADAT-4

AES Out 1

AES Out 2

AES Out 3

AES Out 4

PWR


ADAT In

Analog VTR

CD Player (Analog Out)


ADAT-1 Internal Jumpers

This section provides information about the ADAT-1’s internal jumpersand adjustments.

NOTE For detailed instructions on opening and closing theADAT-1, see Appendix A, “Inside the Module.”

The figure below shows the ADAT-1’s internal jumper locations:A

DA

T-104-0233

J1

InternalReferenceJumper

GR

AH

AM

-PA

TTEN

SY

STE

MS

GR

AS

S V

ALLE

Y, C

ALIFO

RN

IAM

ade in U.S

.A. Reference

InputTerminationJumper

J2

J4

Word ClockPolarityJumper

• J1 is the Internal Reference jumper.

123

– To set the internal reference to 44.1 kHz,strap the jumper between pins 1 and 2.

123

– To set the internal reference to 48 kHz, strapthe jumper between pins 2 and 3.

• J2 is the Word Clock Polarity jumper.

123

– To leave work clock reference normal, strapthe jumper between pins 1 and 2. The risingedge is used as reference.

123

– To invert the work clock reference, strap thejumper between pins 2 and 3. The fallingedge is used as reference.


• J4 is the Reference Input Termination jumper.

123

– To select a bridging input, strap the jumperbetween pins 1 and 2.

123

– To select a terminating input, strap the jumperbetween pins 2 and 3.

ADAT-1 Troubleshooting

The table below lists several ADAT-1 problems, and provides a varietyof “checklist” procedures designed to solve them.

Problem Procedure

No signal atthe receivingdevice.

• Check power at green LED• Disconnect the fiber cable and check

for visible red light (this is notharmful) at ADAT OUT.

All channelsare silent.

• Check at least one input; if any inputis active, at least the -60 dB green LEDshould light or flash.

Sample clock isnot in syncwith thesystem.

• This may cause periodic clicks andpops in the audio. Use AES or systemword clock to the REF IN connector.

NOTE Please contact the GPS factory if the problem stillexists after completing the above procedures.


ADAT-1 Specifications

This section provides audio and environmental specifications, plus atable of ADAT-1 channel routing.

Audio Specifications

Parameter Specification

Analog Inputs

Impedance > 15 kΩGain range -8 dBu to +6 dBu for -20 dBFS output

CMRR > 60 dB, 20 Hz – 20 kHz

Crosstalk < -85 dB, 20 Hz – 20 kHz

Dynamic range > 96 dB

Frequencyresponse

+0/-0.1 dB, 20 Hz – 20 kHz

AES3ID Reference Input

Min. eye opening 165 mV x 0.5 UI (typical level 1 Vp -p)

Input impedance 75 Ω or bridging

Return loss >15 dB (0.1–6 MHz)

Sample frequency 30–50 kHz

Word Clock Reference Input

Amplitude 4.5 ±1 Vp-p

Waveform Square-wave at Fs

Phasing +ve edge coincident with desired audiosampling instant. Use jumper J3 toinvert.

Input impedance >5 kΩ

ADAT Output

Peak wavelength 660 nm

Output power -17 dBm

Audio data 20 active bits plus 4 trailing zeros

Auxiliary data all zeros


NOTE All specifications listed above subject to changewithout notice.


Environmental Specifications and Dimensions


Dimensions(less connectors)

5.2W x 1.62H x 6.625D13.2 x 4.1 x 16.8 cm

Power <700 mA @ 6 Vdc

Operating Temp. 10 – 50 °C

OperatingHumidity

10 – 90% RH non-condensing

NOTE Refer to Appendix D for complete information on therequirements of the ADAT format.

Channel Routing

The table below lists analog-to-ADAT channel routing in the ADAT-1:

Analog Input ADAT Output Track

Channel 1 → 1

Channel 2 → 2

Channel 3 → 3

Channel 4 → 4

Channel 5 → 5

Channel 6 → 6

Channel 7 → 7

Channel 8 → 8


ADAT-2

About the ADAT-2

The SoundPals ADAT-2 is an ADAT-to-analog converter thatseparates a single 8-channel ADAT data stream on optical fiber intoindividual signals, and converts them to eight balanced analog outputs.The unit offers the following features:


• ¼" TRS jack output connectors• Individual analog output level trims (8 total)• Stereo headphone output with volume control• Monitoring assignment switch, for monitoring any output

channel pair• AES or word clock reference output (switchable)• Optional rack mounting tray (1 RU)• Compact size, rugged construction

The unit also features a sync output that provides either a silentAES3ID signal or word clock reference — allowing you to synchronizeanother SoundPals unit to the ADAT data stream.



DA

T-2

AD

AT-

2

7

PWRI/P

ERR

6

1

3

AES3

WCLKREF

5

7/8

5/6 1/23/4

1 2 3 4 5 6 7 8GAIN

2 4

VOLUME

1) Stereo Headphone Connector — provides an unbalanced, low-level, low-impedance, stereo signal for monitoring purposes.

2) Monitor Switch — a four position rotary switch selects thedesired source pair to be monitored: 1/2, 3/4, 5/6 or 7/8.

3) VOLUME — the Headphone Gain Control adjusts the volumeof the channel pair selected with the Monitor Switch. Thecontrol does not affect analog output levels.

4) GAIN — each analog output has an associated multi-turnAnalog Output Gain Trim.

5) AES/WCLK REF — the Reference Switch allows you toselect either AES3ID or word clock as the reference output. TheAES3ID output’s channel status bits (indicating sample rate)can be set using internal jumpers.

6) I/P ERR — this LED lights when no signal is applied to theADAT input, or when the signal is not valid. A non-validsignal exhibits errors such as format violations, bit errors, lowlevel, or incorrect frequency. When lit, the output is muted.

7) PWR — the large green Power LED lights when power isapplied.



AES/WCLKREF OUT

2

MA

DE

IN T

HE

US

A

+6V

700mA

ADATIN

OUT 7

OUT 8

OUT 5

OUT 6

OUT 3

OUT 4

OUT 1

OUT 2

3

1 4

1) Power Connector — accepts the power jack from the 6 VDCpower supply. Please note the printed power rating below theconnector (700 mA). Refer to Appendix B for moreinformation regarding external power.

2) AES/WCLK REF OUT — the AES/Word Clock ReferenceOutput provides either AES3ID or word clock output,depending on the position of the Reference Switch.

3) ADAT IN — the optical input is a standard ADAT signalusing plastic fiber with a maximum range of 1 meter. The inputmust have a sampling frequency between 30 and 50 kHz.

4) Analog Outputs 1 through 8 — all inputs are arranged inleft/right pairs (e.g., OUT 1/OUT 2). All outputs are balancedsignals with a low (30Ω) output impedance capable of driving600Ω loads at +22 dBm. They use standard TRS (Tip, Ring,Sleeve) ¼" phone jacks (Tip +, Ring –). Conversion fromdigital uses 20-bit resolution.


ADAT-2 Installation

This section provides instructions for connecting power, the ADATinput, AES reference output, and analog outputs.

NOTE For information on rack mounting the ADAT-2 withthe optional rack tray, refer to Appendix C.

Connecting Power


Connecting the ADAT Input

The ADAT optical input includes eight audio signals withsynchronization words, auxiliary data bits (currently all zeros) and clockextraction bits to conform to the ADAT format. Using an approved 1-meter (or less) ADAT cable, connect the desired ADAT source to theADAT-2’s input connector.

Connecting AES/Word Clock Reference Output

The ADAT-2 can be connected to another device (such as an ADAT-1or ADAT-3) that requires synchronization to the same reference.Connect the ADAT-2’s AES/WCLK REF OUT connector to thereference input connector of the destination device that requiredsynchronization. Set the Reference Switch to either AES or WCLKREF as required for the specific application.

Connecting Analog Outputs

Connect up to four pairs of analog outputs to the desired pair of rearconnectors (e.g., OUT 1/OUT 2).

• Balanced sources are connected to tip (+) and ring (–) with thesleeve grounded.

• Unbalanced sources are connected to the tip (+) with thesleeve grounded. The ring (–) is not connected.

Refer to the “ADAT-2 Specifications” section for a table of ADAT-2channel routing. Refer to the “ADAT-2 Operation” section forinstructions on correctly adjusting output level.


ADAT-2 Operation

This section provides instructions for adjusting output gain, selecting amonitoring pair, and using the headphone monitor. Refer to the“ADAT-2 Specifications” section for a table of ADAT-2 channelrouting.

Using the Gain Controls

For setting left and right output levels, each output has its own leveladjustment on the front panel. Outputs are factory-set for +4 dBu at-20 dBFS. Other levels can be set by using the following alignmentprocedure:

To align the analog outputs:

1. Obtain a source that can generate a tone at reference level onall eight optical channels. For example, you could play back adigitally recorded 1 kHz tone from an Alesis recorder/player —and ensure that the tone is recorded on all eight channels.

2. Connect the optical output of the Alesis recorder/player to theADAT IN connector on the ADAT-2.

3. Connect an analog VU meter to the ADAT-2’s OUT 1connector.

4. While watching the meter, adjust the output’s Gain Trim forthe desired level (typically +4).

5. Repeat steps 3 and 4 for the remaining ADAT-2 outputs.

Selecting a Monitoring Pair

To select a pair of outputs to monitor, rotate the switch to the desiredpair: 1/2, 3/4, 5/6 or 7/8. The selected pair can now be monitored withthe headphones.

Using the Headphone Monitor

The selected pair of analog outputs may be monitored with a pair ofstereo headphones plugged into the headphone jack. Best results areobtained with a headphone impedance of 20–50 Ω. Use the associatedstereo VOLUME control to set a comfortable listening level. Thevolume control does not affect the analog output levels.




• Connecting to a Workstation — Analog In, Analog Out

In this application, analog inputs are routed to the workstationthrough the ADAT-1. The workstation’s optical output isrouted to the ADAT-2, and the four pairs of analog outputs areconnected to the desired analog destinations. Because theADAT-2’s reference output locks the ADAT-1, theworkstation is effectively the reference for the entire system.

D/ESAM MixerFacility Routing Switcher

(Analog)

Analog VTR

Workstation

AnalogInputs

Cassette Recorder / Player

Analog Inputs

SoundPals ADAT-1


PWR


ADAT Out




SoundPals ADAT-2


PWR


ADAT In





• Connecting to a Workstation — Digital In, Analog Out

In this application, digital inputs are routed to the workstationthrough the ADAT-3. The workstation’s optical output isrouted to the ADAT-2, and the four pairs of analog outputs areconnected to the desired analog destinations. The ADAT-2’sreference output locks the ADAT-3.

D/ESAM MixerFacility Routing Switcher

(Analog)

Analog VTR

Workstation

AnalogInputs

DigitalInputs

SoundPals ADAT-2


PWR


ADAT In




SoundPals ADAT-3

AES In 1

AES In 2

AES In 3

AES In 4

PWR


ADAT Out

Control

Cassette Recorder / Player



This section provides details about the ADAT-2’s internal jumpers.


The figure below shows the ADAT-2’s internal jumper locations:

ADAT-204-0234-

J101

ReferenceChannelStatus

J504

J505

GRAHAM-PATTEN SYSTEMSGRASS VALLEY, CALIFORNIA

Made in U.S.A.

AutoMute

Word ClockPolarity Jumper

• J101 is the Auto Mute jumper (for all analog outputs).

12

– To mute all the analog outputs when digitalsilence comes into the unit, install the jumper.

12

– To prevent the output from muting whendigital silence comes in, remove the jumper.

• J504 is the Word Clock Polarity jumper.

123

– To leave work clock reference normal, strapthe jumper between pins 1 and 2. The risingedge is used as reference.

123

– To invert the work clock reference, strap thejumper between pins 2 and 3. The fallingedge is used as reference.


• J505 is the Reference Channel Status jumper that allows youto set channel status bits 6 and 7 on the AES3 reference output(only). Analog outputs are not affected.

531

642

– To leave the status bits at their defaultsetting, strap the jumpers between pins 1 and3, 2 and 4. No sample frequency will beindicated on bits 6 and 7.

531

642

– To set the status bits to 48 kHz, strap thejumpers between pins 1 and 3, 4 and 6.

531

642

– To set the status bits to 44.1 kHz, strap thejumpers between pins 2 and 4, 3 and 5.

531

642

– To set the status bits to 32 kHz, strap thejumpers between pins 3 and 5, 4 and 6.

NOTE It is highly recommended that you leave the jumpersat their default position, unless the specificdestination device requires a frequency setting on itsreference input.



The table below lists several ADAT-2 problems, and provides a varietyof “checklist” procedures designed to solve them.

Problem Procedure

No Output. • Check Power by Green LED.

All outputs aresilent.

• Check Input ERROR LED.• Verify that the source is not silent.

Input ERROR. • Unplug the fiber cable and check forvisible red light (this is not harmful).

• If no light is visible, unplug the cablefrom the source and check for visiblered light from the transmitter.

• Check for possible break in the fiber.







ADAT Input


Input sensitivity Adequate sensitivity to receive a signaltransmitted at −17 dBm over 1 meter ofplastic fiber (Sharp GP1C321) withouterrors.


AES3ID Synchronization Output

Amplitude 1±0.2 Vp-p

Rise time 37±7 ns

Output impedance 75Ω


DC on output <50 mV

Word Clock Synchronization Output

Amplitude VLO <0.5 V at IOUT=-5 mA

VHI >4.5V at IOUT=5 mA


Phasing +ve edge coincident with audio samplinginstant. Use jumper J504 to invert.

Analog Outputs

Impedance 30Ω

Level range -5 dBu to +12 dBu at -20 dBFS

Maximum output (Measured at 86 dB S/THD+N.) +24 dBu(bridging load), +22 dBu (600Ω load)

Crosstalk -85 dB, 20 Hz – 20 kHz


Frequencyresponse

+0/-0.2 dB, 20 Hz – 20 kHz

Dynamic range >96 dB


Audio Specifications (continued)


Headphone Output

Impedance 20Ω minimum load

Freq. Response +0/-0.2 dB, 50 Hz – 20 kHz

Dynamic range >91 dB

NOTE All specifications subject to change without notice.Refer to Appendix D for information on therequirements of the ADAT format.




5.2W x 1.62H x 6.625D13.2 x 4.1 x 16.8 cm


Operating Temp. 10 – 50 °C

OperatingHumidity


Channel Routing

The table below lists ADAT-to-analog channel routing in the ADAT-2:

ADAT Input Track Analog Output

1 → Channel 1

2 → Channel 2

3 → Channel 3

4 → Channel 4

5 → Channel 5

6 → Channel 6

7 → Channel 7

8 → Channel 8


ADAT-3

About the ADAT-3

The SoundPals ADAT-3 is an AES-to-ADAT converter that combinesfour AES input audio pairs, on either balanced or coaxial cable, into asingle 8-channel ADAT data stream on optical fiber.


• Sync input/output connector• Remote control connector• Selectable master timing (synchronization) source• Individual muting of each input pair• Optional sample rate conversion configurations• Optional rack mounting tray (1 RU)• Compact size, rugged construction

Note that the ADAT output can be synchronized to any one of the mainAES inputs, or to word clock, or a secondary AES3ID signal that is fedto the reference input. With the ADAT-3 synchronized to one of theAES inputs, the reference connector can be used to output word clock.

Six models are available:

Model Description

A0 AES3 inputs (XLR), 0 sample rate convertersA2 AES3 inputs (XLR), 2 sample rate convertersA4 AES3 inputs (XLR), 4 sample rate convertersB0 AES3ID inputs (BNC), 0 sample rate

convertersB2 AES3ID inputs (BNC), 2 sample rate

converters


B4 AES3ID inputs (BNC), 4 sample rateconverters


The figure below illustrates the ADAT-3’s front panel:

AD

AT-

3

AD

AT-

3

MASTER

6

43 7

ADAT OUT

1

CONTROL

INPUT1

2

1

2

3

4

3

4

SYNC PWRSYNC

EXTREM

OUT

IN

2

5

1) ADAT OUT — the optical output is a standard ADAT signalusing plastic fiber with a maximum range of 1 meter. Data islocked to the timing master.

2) SYNC — the reference synchronization connector can be setas either an input or an output with the Reference Switch.

3) Reference Switch — the three position switch determines thefunction of the adjacent SYNC connector:

• In the IN or REMOTE positions, the SYNCconnector accepts either AES3ID or word clock (thesystem distinguishes between the two). This sourcemay be used as the timing master if present.

• In the OUT position, the SYNC connector providesword clock that is synchronous with the AES timingmaster input.

NOTE With the switch in the OUT position, do not connectto another reference output.

4) CONTROL — the Remote Control connector allows you toremotely mute channels and select the timing master. Refer tothe “ADAT-3 Remote Control” section for details.

5) EXT SYNC — the green External Sync LED lights when theexternal reference input is valid. The LED flashes whenexternal sync is being used as the timing master.


6) Indicator LEDs — eight indicators are provided:

INPUT — four red LEDs are provided, one for each input. Thefollowing LED conditions are possible:

• An INPUT LED lights when no signal is applied tothe 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 INPUT LED blinks slowly when a valid input hasbeen muted via the remote control interface.

• When an INPUT LED is lit (either continuously orblinking), the input signal is muted.

MASTER — four green LEDs are provided, one for eachinput. The following LED conditions are possible:

• A MASTER LED lights continuously when the inputsignal may be used as the output timing reference.

• A MASTER LED blinks slowly when that input signalis in use as the output timing reference.

• A MASTER LED is off when that input has beendisabled as a timing master (via remote control).

7) PWR — the large green Power LED lights when system poweris applied.


AES IN 1 AES IN 2 AES IN 3 AES IN 4

MO

DE

L A

2

MA

DE

IN T

HE

US

A

31

400mA

+6V

2

SRC SRC

4 6 75

1) ADAT-3 Model — the printed legend indicates the model: A0,A2, A4, B0, B2, or B4.

2) Power Connector — accepts the power jack from the 6 VDCpower supply. Refer to Appendix B for more informationregarding external power.


3) AES IN 1 — input #1 must have a sampling frequencybetween 30 and 50 kHz and must be frequency locked to thetiming master unless an SRC is installed.

4) AES IN 2 — identical in function to input #1.

5) SRC — the SRC label indicates that the AES input is equippedwith a sample rate converter.



Note the following important points regarding each ADAT-3 input:

• In models A0, A2, and A4, each input is balanced andequipped with an XLR connector.

• In models B0, B2, or B4, each input is unbalanced andequipped with a BNC connector.

• An input with errors will automatically be muted. Muting mayalso be achieved remotely through the control connector. Anyinput without errors may be used as the timing master unlessinhibited via the control connector.

• If the label SRC appears above a connector, the input isequipped with a Sample Rate Converter. An SRC-equippedinput does not have to be synchronous — mixing inputs atvarious sample rates is allowed. The selected timing masterdetermines the output sample rate. See the “ADAT-3 RemoteControl” section for instructions on selecting the timingmaster, and a description of the default timing master logic.

Internal jumpers allow the inputs to be terminating or bridging, andselect either 20- or 24-bit processing mode. In 20-bit mode, any auxiliarydata on the AES inputs will be discarded. Refer to the “ADAT-3Internal Jumpers” for instructions on all jumper settings.


ADAT-3 Installation

This section provides instructions for connecting power, digital inputs,and ADAT outputs.

NOTE For information on rack mounting the ADAT-3 withthe optional rack tray, please refer to Appendix C,“Rack Tray.”

Connecting Power


Connecting Digital Inputs

Connect digital audio input signals to the 4 rear connectors markedAES IN 1 through AES IN 4. Only the inputs marked SRC haveinternal sample rate converters. Please note:

• When using model A4 or B4 in an asynchronous environment,any signal may be connected to any input. Any input can beassigned as the master. If no master is assigned, the lowest-numbered, error-free input becomes the master.

• When using model A0 or B0 in a synchronous environment,any signal may be connected to any input, but all four inputsmust by synchronous. Any input can be the master.

• When using model A2 or B2 in a combined synchronous-asynchronous environment, it is important that the signalsconnected to inputs 1 and 2 are synchronous — although thesignals connected to inputs 3 and 4 may be asynchronous.Either input 1 or 2 can be assigned as the master.

Refer to the “ADAT-3 Specifications” section for a table of ADAT-3channel routing.

NOTE Synchronous digital audio signals must be at exactlythe same frequency (locked to the same referencesource), but they need not be in the same phase.Neither AES bit phase, frame phase, nor block phaseis important.


For all input connections, the corresponding red ERROR LED on thefront panel will extinguish when valid input signals are applied.

ADAT-3 normally terminates all digital inputs with 110Ω (75Ω for Bmodels). When it is necessary to loop a signal to several SoundPals thesignal must be terminated only once, and always at the last unit in thechain. Refer to the “ADAT-3 Internal Jumpers” section for informationon changing the input from terminating to bridging.

Connecting the ADAT Output

The ADAT optical output combines the eight audio signals withsynchronization words, auxiliary data bits (currently all zeros) and clockextraction bits to conform to the ADAT format. Using an approved 1-meter (or less) ADAT cable, connect the ADAT-3 to the desireddestination device.

Note that processing accuracy may be set using an internal jumper. Thefactory default (20-bit processing) is recommended unless you arecertain that the AES input auxiliary data bits contain the 4 LSBs of a 24-bit audio signal.

• In 20-bit mode, auxiliary data is passed (unprocessed) frominput to output.

• In 24-bit mode, auxiliary data is treated as part of the inputaudio signal.

Refer to the “ADAT-3 Internal Jumpers” section for information onchanging the processing accuracy.

NOTE The ADAT-3’s output sampling frequency alwaysmatches the master’s input frequency (e.g., if 48 kHzcomes in, 48 kHz goes out).


ADAT-3 Operation

This section includes instructions for selecting sync, plus an importantreview of timing master priority. Refer to the “ADAT-3 Specifications”section for a table of ADAT-3 channel routing.

NOTE For details on connecting remote control, see the“ADAT-3 Remote Control” section.

Selecting Sync

With AES (or AES3ID) inputs connected and the ADAT outputconnected, there are four options available for determining how sync isselected. Choose the best option for your specific requirements.

• Sync Option 1

Remote: No connectionSync: No external connection

In this configuration, the ADAT-3 automatically selects thehighest priority input that has no errors as the timing master(with input 1 being the highest, followed by 2, 3, and 4). TheSYNC connector is also available for use as a word clockoutput that locks to the selected timing master. If the currentmaster develops an error, the next lower-numbered error-freeinput automatically becomes the master.

For example, if you only connect inputs 1 and 2, the systemlocks to input 1. If input 1 develops an error or isdisconnected, the system locks to input 2.

• Sync Option 2

Remote: No connectionSync: External connection

In this configuration, connect either AES3ID or word clock tothe SYNC connector. The system automatically distinguishesbetween the two. The input can be either terminating (75Ω forAES only) or bridging (for word clock).

Place the Reference Switch in the IN position to set the SYNCinput as the highest priority (higher in fact than input 1). TheSYNC input will be used as the master, unless it isdisconnected or develops an error, whereby the next lower-numbered error-free input automatically becomes the master.


• Sync Option 3

Remote: ConnectedSync: No external connection

With a remote cable connected to a customer supplied remotecontroller unit, you have the ability to mute inputs and selectwhich one is the master.

Place the Reference Switch in the REM position to allow theremote controller to determine which input is used as thetiming master.

• Sync Option 4

Remote: ConnectedSync: External connection

In this configuration, both SYNC (either AES3ID or wordclock) and a customer supplied remote controller unit areconnected. You can mute inputs and select the master.

~ With the Reference Switch in the IN position, theSYNC input is used as the timing master (just likeoption 2 above).

~ With the Reference Switch in the REM position, theremote controller determines which input (includingSYNC) is used as the timing master. If all inputs aredisabled as the master, the SYNC input is master.

NOTE The EXT SYNC LED follows same logic as the otherfour MASTER LED’s. If there is a valid sync input,the LED is green. If the LED is blinking, it is theselected master, and the Reference Switch is in theIN or REMOTE positions.

Refer to the “ADAT-3 Remote Control” section for completeinformation on connecting and operating a remote controller unit.


Timing Master Priority Control

The ADAT-3 uses a priority system for assigning the master. Thehighest priority input that has no errors and is not disabled via theremote control connector is used as the timing master.

Input prioritization is controlled by the three position Reference Switch,as illustrated in the following table:

Input Priority

Ref. SwitchPosition

Ref.Input

AESInput 1

AESInput 2

AESInput 3

AESInput 4

Output — 1 2 3 4

Input 1 2 3 4 5

Remote 5 1 2 3 4

Note the following important points regarding priority:

• If the current master develops an error, the next lowest-numbered error-free input automatically becomes the master.

• If no valid timing master can be found, the ADAT-3’s output isturned off.


ADAT-3 Remote Control

This section provides remote control information for the ADAT-3.

Remote Control Connection

A remote controller unit (customer supplied) can be designed andconnected to the 9-pin “D” CONTROL connector on the front ofADAT-3 module. Once connected and properly wired, the followingremote control capabilities are provided:

• Input muting — this function sets which audio inputs areenabled on the audio output.

• Input master disable — this function determines which input isassigned as the output timing reference.

The following table lists the pin-outs for the remote control interface:

Pin # Function

1 Input 1 master disable

2 Input 4 mute

3 Input 3 mute

4 Input 2 mute

5 Input 1 mute

6 Common




The figure below illustrates one example of a remote control unit:

Remote Control Connector

Input 1 Mute (Switch 1) Input 1 Master Disable (Switch 5)

Input 2 Mute (Switch 2)



Input 2 Master Disable (Switch 6)




The following parts are required to build your remote control unit:

• Remote housing (case)• 8 switches• 1 (one) 9-pin “D” control connector• Shielded multi-conductor cable• Power is not required

Using the previous “pin-out” table as a guide, the followingconnections can be made:

• Connect the bottom lead of all switches to Common (pin 6)• Connect the top lead of switch 1 to Input 1 Mute (pin 5)• Connect the top lead of switch 2 to Input 2 Mute (pin 4)• Connect the top lead of switch 3 to Input 3 Mute (pin 3)• Connect the top lead of switch 4 to Input 4 Mute (pin 2)• Connect the top lead of switch 5 to Input 1 Disable (pin 1)• Connect the top lead of switch 6 to Input 2 Disable (pin 9)• Connect the top lead of switch 7 to Input 3 Disable (pin 8)• Connect the top lead of switch 8 to Input 4 Disable (pin 7)

NOTE Remote control signals are standard +5 V CMOSlogic levels or contact closures to common.

Remote Control Operation

With the remote control unit (customer supplied) connected to theADAT-3, two remote operating modes are provided:

• The remote “Mute” function allows you to select which inputsare enabled on the ADAT output:

• The remote “Master disable” function allows you to determinewhich input is used as the output timing reference.

To mute inputs:

1. Using the appropriate “Mute” switches on the ADAT-3 remotecontrol, turn the desired combination of inputs off. Inputs thatremain on are enabled on the ADAT output.

NOTE • An input’s associated red ERROR LED willblink slowly when that input has been mutedvia the remote control.

• If an input is muted, it can still be the master.


To disable inputs as the master:

1. Using the appropriate “Master Disable” switches on theADAT-3 remote control, disable the desired combination ofinputs from being assigned as the master timing reference.

Note the following important points regarding the master assignment:

• One of the four inputs must always be assigned as the master.If all error-free inputs are disabled via remote control, theoutput signal will be muted.

• Any input that is not displaying an error condition (as shownby a red ERROR LED) may be used as the master.

• If an input is enabled as master, its associated green MASTERLED lights continuously.

• If an input is in use as the timing reference, its associatedMASTER LED blinks slowly.

• If an input is disabled from being the master, its associatedMASTER LED is off.

Remote Control Specifications


High Logic Level >4 V (Iout <50 µA)

Low Logic Level <1 V (Iout <200 µA)




• AES-to-ADAT Conversion — Digital In, Analog Out

In this application, AES signals from the D/ESAM mixer andtwo DAT recorders are connected to the ADAT-3’s inputs. Aremote controller allows you to select the timing master. TheADAT-3’s optical output is routed to the input of aworkstation for further audio processing. The workstation’sADAT output is routed to the ADAT-2 for analog output.

DAT Recorder / Player

D/ESAM Mixer


Workstation

SoundPals ADAT-3

AES In 1

AES In 2

AES In 3

AES In 4

PWR


ADAT Out

Control

DigitalProgramOutputs Remote

Control

SoundPals ADAT-2


PWR


ADAT In





• AES-to-ADAT Conversion — Digital In, Digital Out

In this application, AES signals from the D/ESAM mixer andtwo DAT recorders are connected to the ADAT-3’s inputs. Aremote controller allows you to select the timing master. TheADAT-3’s optical output is routed to the input of an ADATRecorder for record/playback operations. The ADATrecorder’s ADAT output is routed to an ADAT-4 for digitalAES output.


D/ESAM Mixer


SoundPals ADAT-3

AES In 1

AES In 2

AES In 3

AES In 4

PWR


ADAT Out

Control

DigitalProgramOutputs Remote

Control

DigitalOutputs

SoundPals ADAT-4

AES Out 1

AES Out 2

AES Out 3

AES Out 4

PWR


ADAT In

ADAT Recorder

ADATIn

ADATOut



This section provides information about the ADAT-3’s internaljumpers.



AES InputTermination Jumpers

20/24 BitJumper

ADAT-304-0235-

GR

AH

AM

-PA

TTE

N S

YS

TEM

SG

RA

SS

VA

LLE

Y, C

ALI

FOR

NIA

Mad

e in

U.S

.A.

J102

J202

J302

J402

J702

J700J703

J602

J601

Reference Input Termination

Jumper

Word Clock Output Polarity

Jumper

Word Clock Input Polarity

Jumper

SRC BypassJumper

• J102, J202, J302, and J402 are AES Input Terminationjumpers.

12

– To terminate the AES input, install the jumper— 75Ω for AES3ID (BNC) or 110Ω for AES3(XLR) depending on the model.

12

– To bridge the input, remove the jumper.


• J702 is the Reference Input Termination jumper. Theinformation below is only valid when the Reference Switch isset to the REM or IN positions.

12

– To terminate the reference input, install thejumper — 75Ω for AES3ID (BNC).

12

– To bridge the input, remove the jumper. Usethis setting for word clock (this is the defaultconfiguration as shipped).

• J601 is the 20/24 Bit jumper.

12

– To set all 4 channels to 24 bits, install thejumper. This is the default configuration.

12

– To set all 4 channels to 20 bits, remove thejumper. In 20-bit mode, any auxiliary data onthe AES inputs will be discarded.

• J602 is the SRC Bypass jumper. Its factory defaultconfiguration depends on your ADAT-3 model, but you canalso selectively bypass sample rate converters as required.

1234

– To enable all SRC’s, remove all jumpers.

1234

– To bypass SRC’s on inputs 1 and 2, strap ajumper between pins 3 and 4.

1234

– To bypass SRC’s on inputs 3 and 4, strap ajumper between pins 1 and 2.

1234

– To bypass all SRC’s, strap jumpers betweenpins 1 and 2, 3 and 4.

NOTE Whenever SRC’s are enabled, the input data path isalways 20-bits, regardless of the setting of J601.


• J700 is the Word Clock Input Polarity jumper. Theinformation below is only valid when the Reference Switch isset to the IN position, and the SYNC connector is used as areference word clock input.

123

– To leave work clock input reference normal,strap the jumper between pins 1 and 2. Therising edge is used as reference.

123

– To invert the work clock input reference,strap the jumper between pins 2 and 3. Thefalling edge is used as reference.

• J703 is the Word Clock Output Polarity jumper. Theinformation below is only valid when the Reference Switch isset to the OUT position, and the SYNC connector is used as areference word clock output.

123

– To leave work clock output reference normal,strap the jumper between pins 1 and 2. Therising edge is used as reference.

123

– To invert the work clock output reference,strap the jumper between pins 2 and 3. Thefalling edge is used as reference.



The table below lists ADAT-3 problems and solutions.

Problem Procedure

No signal atthe receivingdevice.

• Check power at green LED• Disconnect the fiber cable and check

for Visible red light at ADAT OUT(this is not harmful).

• Check for at least one valid input orsync reference; one green LED shouldbe blinking (either Master or EXTSYNC).

Sample clock isnot in syncwith thesystem.

• This may cause periodic clicks andpops in the audio. Use AES or systemword clock to the SYNC connector,and set the Reference Switch to IN.

All channelsare silent.

• Check at least one unmuted input; itsred LED should not be lit and shouldnot be blinking.

Remoteinterface

• All remote functions are high (+5v)when enabled and low (GND) whendisabled. With no connection, allsignals are high.





NOTE All specifications subject to change without notice.



Dynamic Range

24-bit processing 138 dB (120 dB with SRC)

20-bit processing 120 dB (118 dB with SRC)

A models — AES3 Input

Min. eye opening 200 mV x 0.5 UI

Input impedance 110Ω or bridging


B models — AES3ID Input





ADAT Output


Output power -17 dBm

AES3ID Reference Input




Word Clock Reference Input

Amplitude 4.5 ±1 Vp-p




Input impedance >5kΩ




Word Clock Reference Output

Amplitude VLO <0.5 V at IOUT = -5 mA

VHI >4.5 V at IOUT = 5 mA






5.2W x 1.62H x 6.625D13.2 x 4.1 x 16.8 cm


Operating Temp 10 – 50 °C

OperatingHumidity


Channel Routing

The table below lists digital-to-ADAT channel routing in the ADAT-3:

AES Input ADAT Output Track

1 → 1, 2

2 → 3, 4

3 → 5, 6

4 → 7, 8


ADAT-4

About the ADAT-4

The SoundPals ADAT-4 is an ADAT-to-AES converter that separates asingle 8-channel ADAT data stream on optical fiber into four AESoutput audio pairs, on either balanced or coaxial cable. AES outputs aresynchronous with the ADAT input.


• Synchronizing connector for a silent AES3ID or word clockoutput. This output can be used to synchronize otherSoundPals to the ADAT data stream.

• Front panel switch for selecting reference output• Optional rack mounting tray (1 RU)• Compact size, rugged construction

Two product models are available: The “A” model has AES3 outputs(XLR), and the “B” model has AES3ID outputs (BNC).



DA

T-4

AD

AT-

4

2 5

ADAT IN

1

SYNC OUT PWRI/P ERR

43

WCLK

AES

1) ADAT IN — the optical input is a standard ADAT signalusing plastic fiber with a maximum range of 1 meter. The inputmust have a sampling frequency between 30 and 50 kHz.

2) SYNC OUT — the synchronization output can be set to eitherAES3ID or word clock, depending on the position of theadjacent Sync Switch. The AES3ID output uses the samechannel status bit settings as the main AES outputs.

3) AES/WCLK — the two position Sync Switch allows you toselect either AES3ID or word clock as the sync output.

4) I/P ERR — this LED lights when no signal is applied to theinput, or when the signal is not valid. A non-valid signalexhibits errors such as format violations, bit errors, low level, orincorrect frequency. When lit, the output is muted.

5) PWR — the large green Power LED lights when system poweris applied.



AES OUT 1 AES OUT 2 AES OUT 3 AES OUT 4

MO

DE

L A

MA

DE

IN T

HE

US

A

31

200mA

+6V

2 4 5 6

1) ADAT-4 Model— the “A” model has AES3 outputs (XLR), andB” model has AES3ID outputs (BNC).

2) Power Connector — accepts the power jack from the 6 VDCpower supply. Refer to Appendix B for more informationregarding external power.

3) AES OUT 1 — output #1 is standard AES audio, either AES3(XLR) for the A model or AES3ID (BNC) for the B model. Theoutput is locked to the ADAT input.

4) AES OUT 2 — identical in function to output #1.



An internal jumper allows the outputs to have 20 or 24 active bits. In20-bit mode, each output’s auxiliary data bits will be set to zeros.Output channel status bits will reflect the 20/24-bit mode setting. Referto the “ADAT-4 Internal Jumpers” for instructions on all jumpersettings.


ADAT-4 Installation

This section provides instructions for connecting power, digital inputs.and digital outputs.

NOTE For information on mounting the DMIX-41 with theoptional rack tray, please refer to Appendix C, “RackTray.”

Connecting Power


Connecting the ADAT Input

The ADAT optical input includes eight audio signals withsynchronization words, auxiliary data bits (currently all zeros) and clockextraction bits to conform to the ADAT format. Using an approved 1-meter (or less) ADAT cable, connect the desired ADAT source to theADAT-4’s input connector.

Connecting AES Outputs

Connect the digital audio output from one of the four AES OUTconnectors, and route it to the input of the desired destination device.Repeat the procedure for all digital outputs as required.

Refer to the “ADAT-4 Specifications” section for a table of ADAT-4channel routing.


ADAT-4 Operation

This section includes instructions for operating the ADAT-4. See the“ADAT-4 Specifications” section for a channel routing table.

Operating procedures for the ADAT-4 are quite simple:

• Connect the ADAT input from the desired ADAT source.• Connect AES outputs to the desired destinations.• If you want to use the ADAT-4 as the reference for another

device, connect the SYNC OUT connector to the referenceinput of the destination device, and use the Sync Switch toselect either AES or word clock reference.




• ADAT-to-AES Conversion

In this application, the ADAT optical cable is connected froman audio workstation to the ADAT-4. The AES outputs fromthe ADAT-4 are connected to the inputs of a D/ESAM mixer, aDAT recorder, and also to a DAC-20 for purposes of drivinganalog outputs and headphones.

D/ESAM Mixer


Analog Out (L)Analog Out (R)

Workstation

DigitalInputs

SoundPals ADAT-4

AES Out 1

AES Out 2

AES Out 3

AES Out 4

PWR


ADAT In

StereoHeadphones

SoundPals DAC-20

AES In

AES In

Right Out

Left Out

PWR

Headphones

Volume

R Trim

L Trim


• ADAT Bridge to AES Routing System

In this application, the ADAT-3 and ADAT-4 combine toprovide a bridge in and out of an AES routing switcher.

~ The ADAT-4 accepts an optical input from a sourceADAT device (such as a workstation or ADATrecorder), and provides four AES outputs that feedthe routing switcher.

~ The ADAT-3 accepts four AES inputs from therouting switcher, and provides an optical ADAToutput for routing to ADAT destinations.

Facility AES Routing Switcher

SoundPals ADAT-4

AES Out 1

AES Out 2

AES Out 3

AES Out 4

PWR


ADAT In

From ADATSource

Devices

SoundPals ADAT-3

AES In 1

AES In 2

AES In 3

AES In 4

PWR


ADAT Out

Control

To ADATDestinationDevices



This section provides information about the ADAT-4’s internal jumpersand switches.



20/24 BitJumper

Word Clock Polarity Jumper

ADAT-404-0236-

GR

AH

AM

-PA

TTE

N S

YS

TEM

SG

RA

SS

VA

LLE

Y, C

ALI

FOR

NIA

Mad

e in

U.S

.A.

J5

SW2

J2

StatusDip Switch

• J2 is the 20/24 Bit jumper.

12

– To set all 4 channels to 24 bits, install thejumper. This is the default configuration.

12

– To set all 4 channels to 20 bits, remove thejumper. In 20-bit mode, any auxiliary data onthe AES inputs will be discarded.

• J5 is the Word Clock Input Polarity jumper.

123

– To leave work clock input reference normal,strap the jumper between pins 1 and 2. Therising edge is used as reference.

123

– To invert the work clock input reference,strap the jumper between pins 2 and 3. Thefalling edge is used as reference.


SW2 is the Status Dip Switch which is used to set the channel statuson all AES outputs, including the SYNC output (provided that the SyncSwitch is set to AES). The switch is an eight-position DIP, of whichfive switches are active.

1 2 3 4 5 6 7 8

OPEN

1 (closed) top position

0 (open) bottom position

For all switches:

~ 0 is open~ 1 is closed~ The default setting is all 0’s

• Switches 1 and 2 determine the Emphasis.

Function SW1 SW2

Not Indicated 0 0

None 1 0

50/15uS 0 1

J.17 1 1

• Switches 3 and 4 determine the Sample Frequency.

Function SW3 SW4

Not Indicated 0 0

48 kHz 0 1

44.1 KHz 1 0

32 KHz 1 1

• Switch 5 determines the Stereo Mode.

Function SW5

Not Indicated 0

Stereo 1



The table below lists ADAT-4 problems and solutions.

Problem Procedure

No output. • Check Power by Green LED.

Outputs areall silent.

• Check Input ERROR LED.• Verify that the source is not silent.

InputERROR.

• Unplug the fiber cable and check forvisible red light (this is not harmful).

• If no light, unplug the cable from thesource and check for visible red lightfrom the transmitter.

• Check for possible break in the fiber.




This section provides audio, remote, and environmental specifications,plus a table of ADAT-4 channel routing.



Dynamic Range

24-bit processing 138 dB

20-bit processing 120 dB

ADAT Input


Input sensitivity Adequate sensitivity to receive a signaltransmitted at -17 dBm over 1 meter ofplastic fiber (Sharp GP1C321) withouterrors.


A Model — AES3 Outputs (110ΩΩ Termination)

Amplitude 2–7 Vp-p

Rise time 5–30 ns

Output impedance 110Ω ±20% (0.1–6 MHz)

Common mode <-30 dB (0–6 MHz)

B Model — AES3ID Outputs (75ΩΩ Termination)


Rise time 37±7 ns



DC on output <50 mV

AES3ID Synchronization Output


Rise time 37±7 ns




DC on output <50 mV




Word Clock Synchronization Output

Amplitude VLO <0.5 V at IOUT = -5 mA

VHI >4.5V at IOUT = 5 mA



NOTE All specifications listed above subject to changewithout notice.




5.2W x 1.62H x 6.625D13.2 x 4.1 x 16.8 cm


Operating Temp 10 – 50 °C

OperatingHumidity


Channel Routing

The table below lists ADAT-to-digital channel routing in the ADAT-4:

ADAT Input Track AES Output

1, 2 → 1

3, 4 → 2

5, 6 → 3

7, 8 → 4

SoundPals User's Guide Appendix A • 71

Appendix A.

Inside the Module

In This Appendix

This appendix provides instructions for opening and closing allSoundPals modules, to gain access to the internal circuit board.

NOTE The internal circuit board should only be removedfrom the module if you want to change the internaljumper settings.

With the exception of front and rear panel connectors and controls, allSoundPals modules are completely symmetrical in shape.

72 • Appendix A SoundPals User's Guide

Before You Begin

Check the following items before opening the module and attempting toremove the internal circuit board:

• If required, remove the SoundPals module from the rack tray.• Disconnect the power supply from the front of the product.• Disconnect all input, output and control cables.• Perform the remaining steps only in a static free environment.

Make sure that you and the product are both grounded.

The following tools are required:

• #1 Pozidriv screwdriver• #2 Philips screwdriver• 9/16 box wrench (or end wrench)

SoundPals User's Guide Appendix A • 73

Opening The Module

Use the following steps to open a SoundPals module:

1. On the rear panel, remove the four Pozidriv screws from thefour corners of the SoundPals module.

2. On the front panel, remove all Philips XLR mounting screwsfrom the SoundPals module.

NOTE On the ADAT-2 only, pull off the Headphone GainControl knob, then remove the nut from the StereoHeadphone Jack bushing.

3. On the front panel (if BNC connectors are present), remove theBNC nut(s) and associated lock washer(s).

4. Pulling the rear panel, carefully draw the internal circuit boardand rear panel assembly from the housing.

CAUTION If BNC connectors are present, keep the casehorizontal so that the bushings stay with theconnectors.

5. Set the housing and all mounting hardware in a safe place.

74 • Appendix A SoundPals User's Guide

Closing The Module

Use the following steps to close a SoundPals module:

1. Ensure that product label is on the bottom.2. Carefully slide the internal circuit board and rear panel

assembly through the housing. If BNC connectors are present,keep the case horizontal so that the bushings stay with theconnectors.

3. If required, replace all BNC nut(s) and associated lockwasher(s) on the front panel of the module.

NOTE On the ADAT-2 only, you may have to remove thefront panel in order to insert the Stereo HeadphoneJack into the hole. Re-attach the Headphone Jackbushing and Headphone Gain Control knob.

4. Replace all Philips XLR mounting screws on the front panel ofthe module.

5. Replace and tighten the four Pozidriv screws on the rearcorners of the module.

CAUTION Do not over tighten the screws.

SoundPals User's Guide Appendix B • 75

Appendix B.

External Power

About Power Supplies

An external power supply conforming to the specifications listed in thefollowing “Power Supply Specifications” section must be used toguarantee that published SoundPals performance figures are met. Anypower supply meeting these specifications will supply adequate powerfor a single SoundPals module. Although the specification is written forpower supplies running from AC line inputs, DC (battery) sources maybe used if they meet all of the listed requirements.

CE Compliance

For CE compliance, the power supply that you use must comply with thefollowing requirements:

• Low Voltage Directive 73/23/EEC• EMC Directive 89/336/EEC• EMC Directive 93/68/EEC• The connector locking ring must be tight.

Portable Power Sources

For portable SoundPals power sources, sealed lead-acid , nickelcadmium or alkaline primary batteries may be used. However, themaximum voltage must not exceed 8.6 volts, and a minimum of 5.6 voltsis required for normal operation. Maximum current drain will be from 150to 700 mA, depending on the model in use.

76 • Appendix B SoundPals User's Guide

Power Supply Specifications

The following specifications must be met over all anticipated operatingconditions including AC power line range, temperature range, etc.


Output voltage 5.6 V minimum (measured at trough of ripple)at 700 mA constant current.

8.6 V maximum (measured at peak of ripple)at 100 mA constant current.

Ripple voltage 2 Vp-p at 700 mA constant current.

400 mVp-p at 700 mA constant current withexternal 2200 µF capacitor.

Connector Switchcraft 761K with center positive,sleeve negative.

Power Supply Sources

In addition to the GPS-supplied universal power supply, the followingpower supplies meet the SoundPals requirements:

Company Model Note

Stancor STA-4860 120V AC, 60 Hz

Stancor STAF-0797F 220V AC, 50 Hz with European wallplug (CE compliant).

Elpac MI2007 95-250V AC, 47-63 Hz with IECinlet (line cord required). Willpower up to six units (CEcompliant).

SoundPals User's Guide Appendix C • 77

Appendix C.

Rack Tray

In This Appendix

An optional Rack Tray with universal power supply is available for usein mounting all SoundPals, (except for DATS connectors). It can beconfigured with dual universal power supplies when redundant power isrequired. The Rack Tray is particularly useful internationally where itprovides a simple, economical and universal power solution forSoundPals.

SoundPals modules fit three-across inside the Rack Tray. A red LEDindicator light on the tray provides immediate feedback when a powerfailure occurs.

NOTE The Rack Tray unit ships with separate installationinstructions.

78 • Appendix C SoundPals User's Guide

SoundPals User's Guide Appendix D • 79

Appendix D.

The ADAT Standard

In This Appendix

This appendix provides details of the proprietary Alesis ADATtransmission standard.

Channel Coding Method

Each ADAT channel’s 24 audio data bits are comprised of 20 bits fromthe corresponding ADC channel followed by 4 zeros. ADAT usesstandard NRZI coding on the optical link. The transmitter and receivereach require an XOR/D flip-flop combination for encoding to anddecoding from NRZ respectively.

Data Content Transmitted

The following data is transmitted over the optical link every audiosample:

Description Quantity Total

24-bit audio data words 8 192

User bits 4 4

10-bit sync word 1 10

Clock recovery bits 50 50

TOTAL 256

80 • Appendix D SoundPals User's Guide

Data Detail

The following table identifies bit usage within each complete 256 bitdata frame. Bits with fixed values, 1 or 0, are specified before NRZ-to-NRZI encoding. Abbreviations are used to save space:

• UBm = user bit m• Cn/y-x = bits x through y of audio channel n• Channels are numbered from 0 to 7• Bits are numbered from 0 (LSB) to 23 (MSB)

Bits Usage Bits Usage

0-9 0 70 1

10 1 71-74 C1/3-0

11-14 UB3-0 75 1

15 1 76-79 C2/23-20

16-19 C0/23-20 80 1

20 1 81-84 C2/19-16

21-24 C0/19-16 85 1

25 1 86-89 C2/15-12

26-29 C0/15-12 90 1

30 1 91-94 C2/11-8

31-34 C0/11-8 95 1

35 1 96-99 C2/7-4

36-39 C0/7-4 100 1

40 1 101-104 C2/3-0

41-44 C0/3-0 105 1

45 1 106-109 C3/23-20

46-49 C1/23-20 110 1

50 1 111-114 C3/19-16

51-54 C1/19-16 115 1

55 1 116-119 C3/15-12

56-59 C1/15-12 120 1

60 1 121-124 C3/11-8

61-64 C1/11-8 125 1

65 1 126-129 C3/7-4

66-69 C1/7-4 130 1

SoundPals User's Guide Appendix D • 81

Data Detail (continued)

Bits Usage Bits Usage

131-134 C3/3-0 195 1

135 1 196-199 C6/23-20

136-139 C4/23-20 200 1

140 1 201-204 C6/19-16

141-144 C4/19-16 205 1

145 1 206-209 C6/15-12

146-149 C4/15-12 210 1

150 1 211-214 C6/11-8

151-154 C4/11-8 215 1

155 1 216-219 C6/7-4

156-159 C4/7-4 220 1

160 1 221-224 C6/3-0

161-164 C4/3-0 225 1

165 1 226-229 C7/23-20

166-169 C5/23-20 230 1

170 1 231-234 C7/19-16

171-174 C5/19-16 235 1

175 1 236-239 C7/15-12

176-179 C5/15-12 240 1

180 1 241-244 C7/11-8

181-184 C5/11-8 245 1

185 1 246-249 C7/7-4

186-189 C5/7-4 250 1

190 1 251-254 C7/3-0

191-194 C5/3-0 255 1

Synchronization

The ADAT interface is capable of operation over a wide range ofsample rates, typically 30 kHz to 50 kHz. To synchronize to the data bitswithout a priori knowledge of the sample rate it is necessary to make useof the 10-bit synchronization word.

82 • Appendix D SoundPals User's Guide

The synchronization word’s block of binary 0’s is a violation of the runlength (0, 4) code used elsewhere—caused by the insertion of a binary 1after every fourth data bit—and can be recognized as such over a 2½:1frequency range. This is wider than the total operating range of <2:1allowing some latitude in the maximum VCO range. Preliminarysynchronization is accomplished by pulling the VCO until exactly 10clocks occur within the synchronization block. Final synchronization isthen achieved by phase locking to the data transitions.

SoundPals User's Guide Index • 83

Index

0

0 dBu ..............................................5

2

20/24-bit, ADAT-3 ......................36

A

Abbreviations ...............................5ADAT ............................................5ADAT IN

ADAT-2 .................................21ADAT-4 .................................52

ADAT OUTADAT-1 ...................................9ADAT-3 .................................32

ADAT Standard .........................71channel coding ......................71data content ...........................71data detail ...............................72synchronization ....................73

ADAT-1ADAT OUT .............................9AES/WCLK REF IN ................9analog inputs ...........................9audio specifications .............17channel routing .....................18connecting

ADAT output ..................11AES Word Clock .............10

inputs ............................... 10power ............................... 10

description .......................... 2, 7diagram ............................ 13, 14dimensions ............................ 18environmental ....................... 18EXT REF ............................ 8, 10features .................................... 7front panel ............................... 8input gain trims ....................... 8input meters ............................ 8installation ............................. 10interconnection .................... 13internal jumpers .................... 15meter scale ............................... 8operation ............................... 12phase lock frequency .......... 10power connector .................... 9power LED ............................... 9rear panel ................................. 9reference frequency ............... 7reference LEDs ....................... 8setting sample frequency .... 12troubleshooting .................... 16using gain controls .............. 12

ADAT-2ADAT IN ............................... 21AES/WCLK

reference output ............. 21reference switch ............. 20

84 • Index SoundPals User's Guide

align analog outputs ............23analog outputs ......................21audio specifications .............29channel routing .....................30connecting

AES Word Clock .............22analog outputs ................22power ................................22

connecting ADAT input .....22description .........................2, 19diagram .............................24, 25dimensions .............................30environmental ........................30features ...................................19front panel ..............................20gain trim ..................................20headphone connector ..........20headphone gain control .......20I/P ERR ...................................20installation .............................22interconnection .....................24internal jumpers .....................26monitor switch .......................20operation ................................23power connector ...................21power LED .............................20rear panel ................................21select monitor pair ................23sync output ...........................19troubleshooting ....................28using gain controls ...............23VOLUME control ..................23

ADAT-320/24-bit processing .............36A0, A2, A4 models ...............31AES IN

balanced ...........................34SRC ...................................34unbalanced ......................34

audio specifications .............49B0, B2, B4 models .................31channel routing .....................50

connectingADAT output ................. 36digital inputs ................... 35power ............................... 35

description ........................ 2, 31diagram ............................ 43, 44dimensions ............................ 50environmental ....................... 50EXT SYNC ............................. 32features .................................. 31front panel ............................. 32input master disable ....... 40, 42input muting .................... 40, 41input termination .................. 36installation ............................. 35interconnection .................... 43internal jumpers .................... 45LEDs ....................................... 33master timing ......................... 39model ...................................... 33operation ............................... 37operation, remote ................. 41power connector .................. 33power LED ............................. 33rear panel ............................... 33reference switch ................... 32remote

connector ........................ 32specifications .................. 42

remote controlconnection ...................... 40operation ......................... 41pin-outs ........................... 40

selecting sync ....................... 37SYNC ...................................... 32troubleshooting .................... 48

ADAT-4ADAT IN ............................... 52AES OUT

balanced .......................... 53unbalanced ...................... 53

audio specifications ............. 61


channel routing .....................62connecting

ADAT input ....................54outputs .............................54power ................................54

description .........................2, 51diagram .............................56, 57dimensions .............................62DIP switch ..............................59environmental ........................62features ...................................51front panel ..............................52I/P ERR ...................................52installation .............................54interconnection .....................56internal jumpers .....................58model ......................................53models ....................................51operation ................................55power connector ...................53power LED .............................52rear panel ................................53SYNC OUT .............................52sync switch ............................52troubleshooting ....................60

AES .................................................5AES IN

ADAT-3, balanced ...............34ADAT-3, SRC ........................34ADAT-3, unbalanced ...........34

AES OUTADAT-4, balanced ...............53ADAT-4, unbalanced ...........53

AES Word Clock ReferenceADAT-1 .................................10ADAT-2 .................................22

AES/WCLKreference output, ADAT-2 ..21reference switch, ADAT-2 ..20

AES/WCLK REF, ADAT-1 .........9AES3, AES3ID signals .................5Alesis digital audio tape ..............5

Align ADAT-2 analog outputs 23Analog

inputs, ADAT-1 ..................... 9outputs, ADAT-2 ................. 21

Applicationstudio ....................................... 3workstation ............................. 3

ATR ............................................... 5Audio

Engineering Society ............... 5specifications

ADAT-1 ........................... 17ADAT-2 ........................... 29ADAT-3 ........................... 49ADAT-4 ........................... 61DAC-20 ............................ 29

tape recorder ........................... 5

B

BNC T adapters ............................ 6

C

CE compliance ............................ 67Channel ......................................... 4

coding .................................... 71Channel routing

ADAT-1 ................................. 18ADAT-2 ................................. 30ADAT-3 ................................. 50ADAT-4 ................................. 62

Close module .............................. 66Configurations

standalone ............................... 3system ...................................... 3

Connecting ADATinput, ADAT-2 ..................... 22input, ADAT-4 ..................... 54output, ADAT-3 ................... 36

Connecting AES Word ClockADAT-1 ................................. 10ADC-20 .................................. 22


Connecting inputsADAT-1 .................................10ADAT-2 .................................22ADAT-3 .................................35ADAT-4 .................................54

Connecting outputsADAT-1 .................................11ADAT-2 .................................22ADAT-3 .................................36ADAT-4 .................................54

Connecting powerADAT-1 .................................10ADAT-2 .................................22ADAT-3 .................................35ADAT-4 .................................54

Conventions ..................................4

D

Datacontent, ADAT .....................71detail, ADAT .........................72

DiagramADAT-1 ...........................13, 14ADAT-2 ...........................24, 25ADAT-3 ...........................43, 44ADAT-4 ...........................56, 57

Digital tape recorder .....................5Dimensions

ADAT-1 .................................18ADAT-2 .................................30ADAT-3 .................................50ADAT-4 .................................62

DIP Switch, ADAT-4 .................59Distribution amplifier ...................5Documentation

conventions .............................4terms .........................................4

DTR ................................................5

E

Elpac .............................................68

ERROR LED, ADAT-3 .............. 36EXT REF .................................. 8, 10EXT SYNC, ADAT-3 ................. 32External power ............................ 67

F

FeaturesADAT-1 ................................... 7ADAT-2 ................................. 19ADAT-3 ................................. 31ADAT-4 ................................. 51

Front panelADAT-1 ................................... 8ADAT-2 ................................. 20ADAT-3 ................................. 32ADAT-4 ................................. 52

G

Gain controls ................................ 4ADAT-1, using ..................... 12ADAT-2, using ..................... 23

Gain trim, ADAT-2 ..................... 20

H

Headphoneconnector, ADAT-2 ............. 20gain control, ADAT-2 ......... 20

I

I/P ERRADAT-2 ................................. 20ADAT-4 ................................. 52

Inputanalog, digital, ADAT ........... 4connecting

ADAT-1 ........................... 10ADAT-3 ........................... 35

disable, ADAT-3 ............ 40, 42gain trims, ADAT-1 ............... 8LED, ADAT-3 ....................... 33meters, ADAT-1 ..................... 8


muting, ADAT-3 .............40, 41termination, ADAT-3 ...........36

Inside the module .......................63Inspection ......................................6Installation


InterconnectionADAT-1 .................................13ADAT-2 .................................24ADAT-3 .................................43ADAT-4 .................................56

Internal jumpersADAT-1 .................................15ADAT-2 .................................26ADAT-3 .................................45ADAT-4 .................................58

J

JumpersADAT-1 .................................15ADAT-2 .................................26ADAT-3 .................................45ADAT-4 .................................58

L

LEDADAT-3 Indicators ..............33ERROR, ADAT-3 ..................36INPUT, ADAT-3 ...................33MASTER, ADAT-3 ..............33power

ADAT-1 .............................9ADAT-2 ...........................20ADAT-3 ...........................33ADAT-4 ...........................52

Level adjustments ........................4Link SoundPals .............................3Looping ..........................................6

M

Master disable, ADAT-3 .... 40, 42MASTER LED, ADAT-3 .......... 33

modes ..................................... 33Master timing, ADAT-3 ............ 39Meter scale ................................... 8Model

ADAT-3 ................................. 33ADAT-4 ................................. 53

Monitor switch, ADAT-2 ......... 20

O

Open moduleprocedure .............................. 65tools required ........................ 64

OperationADAT-1 ................................. 12ADAT-2 ................................. 23ADAT-3 ................................. 37ADAT-4 ................................. 55

Outputsanalog, digital, ADAT ........... 4connecting

ADAT-1 ........................... 11ADAT-2 ........................... 22ADAT-3 ........................... 36ADAT-4 ........................... 54

P

Phase lock freq., ADAT-1 ........ 10Pin-outs, ADAT-3 remote ........ 40Portable power sources ............ 67Power

ADAT-1 ................................. 10ADAT-2 ................................. 22ADAT-3 ................................. 35ADAT-4 ................................. 54connector

ADAT-1 ............................. 9ADAT-2 ........................... 21ADAT-3 ........................... 33


ADAT-4 ...........................53cords .........................................5domestic, international ...........6external ...................................67LED

ADAT-1 .............................9ADAT-2 ...........................20ADAT-3 ...........................33ADAT-4 ...........................52

portable power sources .......67solution ....................................6supply note ..............................6supply sources ......................68

Elpac .................................68Stancor .............................68

supply specifications ...........68

R

Rack Tray .....................................69Rear panel

ADAT-1 ...................................9ADAT-2 .................................21ADAT-3 .................................33ADAT-4 .................................53

Referencefrequency .................................7LEDs .........................................8looping .....................................6switch, ADAT-3 ....................32

Remote connector, ADAT-3 .....32Remote Control

ADAT-3 .................................40connection, ADAT-3 ...........40operation, ADAT-3 ..............41parts lists, ADAT-3 ..............41pin-outs, ADAT-3 ................40specifications, ADAT-3 .......42

S

Sample frequency, ADAT-1 .....12Sample Rate Converters ..............5

ADAT-3 inputs .................... 34Select Monitor Pair, ADAT-2 .. 23Selecting Sync, ADAT-3 .......... 37Set sample freq., ADAT-1 ........ 12Signals

AES3 ........................................ 5AES3ID .................................... 5valid, ADAT-3 ................ 33, 36

SoundPalsADAT-1 description .......... 2, 7ADAT-2 description .............. 2ADAT-3 description .............. 2ADAT-4 description .............. 2close module ......................... 63configurations ........................ 3external power ....................... 67link ............................................ 3open module ......................... 63portable power sources ....... 67power specifications ............ 68power supply sources ......... 68what are SoundPals ............... 2

Sourceanalog ...................................... 4digital ....................................... 4

SpecificationsADAT-1 ................................. 17ADAT-2 ................................. 29ADAT-3 ................................. 49ADAT-4 ................................. 61environmental

ADAT-1 ........................... 18ADAT-2 ........................... 30ADAT-3 ........................... 50ADAT-4 ........................... 62

power ..................................... 68remote, ADAT-3 ................... 42

SRC ................................................ 5inputs, ADAT-3 ................... 34

Stancor ........................................ 68Standard, ADAT ........................ 71Stereo audio signal ...................... 4


Studio application ........................3Sync

ADAT-3 .................................32OUT, ADAT-4 .......................52switch, ADAT-4 ....................52

Synchronization, ADAT ...........73

T

Termination, ADAT-3 ................36Terms ..............................................4Tray, rack .....................................69Troubleshooting


U

Unity gain ......................................4Unpacking .....................................6Using gain controls ......................4

ADAT-1 .................................12ADAT-2 .................................23

V

Valid signal, ADAT-3 ..........33, 36Values .............................................5Video tape recorder (VTR) ..........5VOLUME control, ADAT-2 ......23

W

Warnings .......................................5What are SoundPals ....................2Word Clock ...................................5Workstation application ..............3

Y

Y cables ..........................................6


interstagePhistersvej 31, 2900 Hellerup, Danmark

Telefon 3946 0000, fax 3946 0040www.interstage.dk

- pro audio with a smile

http://www.interstage.dk/

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