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Symetrix 402 User Manual

Dual output delay
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402 DUAL OUTPUT DELAY
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  • Page 1 402 DUAL OUTPUT DELAY...

  • Page 2: Table Of Contents

    Symetrix part number 53402-0B00 Subject to change without notice. ©1999, Symetrix, Inc. All right reserved. Symetrix is a registered trademark of Symetrix, Inc. Mention of third-party products is for informational purposes only and constitutes neither an endorsement nor a recommendation. Symetrix assumes no responsibility with regard to the performance or use of these products.

  • Page 3: Chapter 1 Introduction

    Chapter 1 Introduction The Symetrix 402 is a single-input, dual-output digital delay intended for use in sound systems, video production, and other applications requiring a high-quality digital signal delay. The 402 uses oversampling 20-bit A/D and D/A converters to achieve recording-studio signal quality in an affordable package.

  • Page 4: Chapter 2 Operator Safety Summary

    Please read and keep these instructions. Heed User-serviceable parts There are no user and follow all warnings and instructions. serviceable parts inside the 402. In case of failure, Install in accordance with the manufacturer’s refer all servicing to the factory. Servicing is instructions.

  • Page 5: Chapter 3 First Time Setup

    Repeat this procedure for the remaining delay output. Ensure that the output signals are delayed from the input signal (since the 402 will pass signal, albeit without any delay, even without AC power applied). You can check this by setting the I...

  • Page 6: Chapter 4 Front & Rear Panel Overview

    LEVEL BYPASS HEADROOM -48 -42 -36 -30 CLIP - Enables the 402 when depressed; hard wire bypass when out or during power-off YPASS condition - Adjusts input level for maximum dynamic range NPUT EVEL - Indicates the input signal level and headroom of the 402. During operation, you...
  • Page 7 AC source value. - Do yourself a ERIAL UMBER FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON favor and write this number down RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ. somewhere safe, and while you’re at it, would you please send us the...
  • Page 8 Output Connectors - XLR-male, UTPUTS DELAY 2 OUTPUT DELAY 1 OUTPUT balanced; TRS phone, unbalanced. The barrier strip output and the XLR output UNBALANCED UNBALANCED are wired in parallel. The TRS output jacks may be strapped for BALANCED BALANCED balanced operation. Terminal Strip ERMINAL TRIP...

  • Page 9: Chapter 5 Block Diagram

    Chapter 5 Block Diagram...

  • Page 10: Chapter 6 Operation

    402 as if the 402 wasn’t there. This ensures that the 402 operates at or near unity gain, which ensures the best overall signal-to-noise ratio through the 402. You can quickly establish the unity...
  • Page 11 Using the Delay Units Mode The 402 can display its delay time in either units of time (milliseconds) or units of distance (feet or meters). The 402 converts any settings into an internally used value (the number of samples); thus the display may appear to be inconsistent (due to internal rounding of fractional values) when switching back and forth between time units and distance units.

  • Page 12: Chapter 7 Sound System Basics

    This delays the arrival of the sound from the fill speakers by an amount of time slightly greater than that required to travel the distance through air. The figure below illustrates this point. A psychoacoustical effect restores the illusion of the sound emanating from the source. DELAYED OUTPUT 402 DIGITAL DELAY PRIMARY REMOTE STACK...
  • Page 13 Details When applying a digital delay such as the 402 in an actual sound system, we must consider the following acoustical sources of time delay: The source to microphone distance. The source to listener distance. The primary sound system to listener distance.
  • Page 14 Other Uses for Delay Of course, the 402 can also be used where a single or double semi-fixed delay might be needed, for instance, to provide fixed slapback at two different rates for an effect, or for satellite uplink transit time compensation.

  • Page 15: Chapter 8 Connecting To Other Gear

    Chapter 8 Connecting to Other Gear This section discusses a multitude of things, all related to getting signals in and out of the 402. Matching Levels versus Matching Impedances In any audio equipment application, the question of “matching” inevitably comes up. Without digging a hole any deeper than absolutely necessary, we offer the following discussion to (hope- fully) clarify your understanding of the subject.
  • Page 16 To operate the 402 from unbalanced sources, run a 2-conductor shielded cable (that’s two conduc- tors plus the shield) from the source to the 402. At the source, connect the low/minus side to the shield, these connect to the source’s ground; connect the high/plus side to the source’s signal...
  • Page 17 In an emergency (the show must go on), you can ground pin 3, but if you have the choice...leave it open. If you must ground pin 3, it is must be grounded at the 402, rather than at the other end of the cable.

  • Page 18: Chapter 9 Applications

    402’s output back to its input. The 402 might be a bit difficult to use in this application because the user interface wasn’t designed for rapid changes in the delay time. On the other hand, if you can live with relatively preset delay times and superb audio quality, the 402 will work just fine, thank you.

  • Page 19: Chapter 10 Troubleshooting

    EADROOM up to but not including the C led. Check gain settings on downstream equipment. The system gain structure should be such that the 402 operates at or near unity gain. Is the input signal already noisy? No LED display Is the unit plugged in, and turned on? Is the AC outlet OK?.

  • Page 21: Chapter 11 Specifications

    Note: The maximum operating ambient temperature is 25 degrees C. 6dB/step, 3 yellow LEDs @ 1dB/step, 1 red LED @ true clipping In the interest of continuous product improvement, Symetrix Inc. Dynamic Range >104 dB. This represents the difference reserves the right to alter, change, or modify these specifications between the largest and smallest signals without prior notice.
  • Page 22 117V nominal AC (105-130V) 50/60 Hz (230V nominal AC, 207-253V, 50 Hz where applicable). Power consumption shall be 12.5 Watts. The DDL shall be Listed by Underwriters Laboratories Inc. (UL) or other equivalent nationally recognized safety testing agency. The unit shall be a Symetrix Incorporated model 402 Dual Output Delay.

  • Page 23: Chapter 12 Warranty & Service

    In no event will Symetrix be liable for any incidental or consequential damages including but not limited to damage for loss of...
  • Page 24 Servicing the 402 If you have determined that your 402 requires repair services and you live outside of the United States please contact your local Symetrix dealer or distributor for instructions on how to obtain service. If you reside in the U.S. then proceed as follows: At the Symetrix factory, Symetrix will perform in-warranty or out-of-warranty service on any product it has manufactured for a period of five years from date of manufacture.

  • Page 25: Appendix A Declaration Of Conformity

    Appendix A Declaration of Conformity Declaration of Conformity We, Symetrix Incorporated, 14926 35th Ave. West, Lynnwood, Washington, USA, declare under our sole responsibility that the product: 402 DUAL OUTPUT DELAY to which this declaration relates, is in conformity with the following standards:...
  • Page 26 Symetrix, Inc. 14926 35th Ave. West Lynnwood, WA, 98037-2303 Tel: (425) 787-3222 Fax: (425) 787-3211 Website: http://www.symetrixaudio.com Email: [email protected]...

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