RJM SoundPals DAC-24 User Manual

Stereo d-to-a converter

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SoundPals™
DAC-24 User Guide
Stereo D-to-A converter

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Summary of Contents for RJM SoundPals DAC-24

  • Page 1 SoundPals™ DAC-24 User Guide Stereo D-to-A converter...
  • Page 2: Fcc Compliance

    The information contained in this guide is subject to change without notice or obligation. Copyrights and Trademarks © 2015 Contents of this publication may not be reproduced in any form without the written permission of RJM & Associates. Reproduction or reverse engineering of copyrighted software is prohibited. FCC Compliance This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules.
  • Page 3: Table Of Contents

    Table of Contents Table of Contents Introduction What are SoundPals? ......................1 Documentation Conventions ....................1 Signals and Values ........................1 Warnings ..........................1 Unpacking and Inspection ....................... 2 Power Supply Note ........................2 DAC-24 About the DAC-24 ........................3 DAC-24 Installation ........................
  • Page 4: Introduction

    Introduction What are SoundPals? Each RJM & Associates SoundPals module is essentially a digital audio building block that can be used independently, or interconnected to perform more advanced mixing and audio processing functions. SoundPals can be used in both standalone and system configurations: In a “standalone”...
  • Page 5: Unpacking And Inspection

    SoundPals are delivered with a power connector only. A separate power supply must be obtained. RJM & Associates offers several power solutions for both domestic and international customers. Refer to “External Power” for detailed power specifications for users who wish to configure their own power source, rather than purchase one from RJM.
  • Page 6: About The Dac-24

    DAC-24 About the DAC-24 The RJM & Associates SoundPals DAC-24 is a stereo, 24-bit, AES digital-to-analog converter. The unit offers the following features: Stereo headphone monitoring with level control • 24-bit D/A converter • Automatic detection and de-emphasis • LED indicators for emphasis and valid AES input •...
  • Page 7: Dac-24 Installation

    7) Power Connector — accepts the power jack from the 6 VDC power supply. Refer to “External Power” for more information regarding external power. 8) Power LED — the large green LED below the power jack lights when power is applied. The figure below illustrates the DAC-24’s rear panel: AES IN RIGHT OUT...
  • Page 8: Connecting Outputs

    Connecting Outputs Connect the analog audio outputs from the LEFT OUT and RIGHT OUT connectors to the inputs of the desired analog destination device. Please note: Balanced outputs are taken from pins 2 ( ) and 3 (-) with pin 1 and the shell grounded. •...
  • Page 9: Dac-24 Interconnection

    R Trim L Trim Right Out Volume Left Out Headphones SoundPals DAC-24 Stereo Headphones Basic — Inserting Analog Equipment • In this application, an analog ATR is seamlessly inserted in a digital stream, using both the DAC and ADC together.
  • Page 10: Advanced - Simultaneous Multi-Format Outputs

    AES In 2 AES In R Trim L Trim AES In 3 Right Out Volume AES Out AES In 4 Left Out Headphones SoundPals DMIX-41 SoundPals DAC-24 Analog Out (L) Analog Out (R) Digital Out Page 7 DAC-24 User Guide...
  • Page 11: Dac-24 Internal Jumpers

    Is the sampling frequency within 4% of 48 KHz, 44.1 KHz or 32 KHz? • Does the emphasis use 50/15 µ s time constants? NOTE Please contact the RJM factory if the problem still exists after completing the above procedures. Page 8 DAC-24 User Guide...
  • Page 12: Dac-24 Specifications

    DAC-24 Specifications This section provides audio and environmental specifications. Audio Specifications Parameter Specification Digital input Terminated (110 Ω AES3, 75 Ω AES3id) Sample Rate 30 KHz - 50 KHz Analog Outputs Impedance Ω Level range -5 dBu to  1 2 dBu at -20 dBFS Maximum output -87dB THD+N +24 dBu (bridging load)
  • Page 13: Inside The Module

    Inside the Module In This Section This section provides instructions for opening and closing the SoundPals DAC-24 module to gain access to the internal circuit board. NOTE The internal circuit board should only be removed from the module if you want to set the termination jumper.
  • Page 14: External Power

    7. Replace all Philips XLR mounting screws at the rear of the SoundPals module. 8. Replace the BNC nut and associated lock washer at the rear of the SoundPals module. CAUTION Do not over tighten the screws. External Power About Power Supplies An external power supply conforming to the specifications listed in the following “Power Supply Specifications”...
  • Page 15: Power Supply Sources

    Power Supply Sources In addition to the RJM-supplied universal power supply, the following power supplies meet the SoundPals requirements: Company Model Note Stancor STA-4860 120V AC, 60 Hz Stancor STAF-0797F 220V AC, 50 Hz with European wall plug (CE compliant).

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