Manual

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DRAWMER

DSL424

TwoPlusTwo

DYNAMICS

OPERATOR’S MANUAL

CONTENTS

Warranty

Safety Consideration

Chapter 1 - Introduction

Introduction

Installation

Audio Connections

Power Connection

Chapter 2 - Control Description

The Noise Gate Channels

The Compressor / Limiter Channels

The Quick Setup Procedure

Chapter 3 - Operation

The Noise Gate Channels

The Compressor / Limiter Channels

Chapter 3 - General Information

If a fault develops

Contacting Drawmer

Specification

Block Diagram

Session Recall Sheet

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Summary of content (13 pages)

PAGE 1
DRAWMER DSL424 TwoPlusTwo DYNAMICS OPERATOR’S MANUAL CONTENTS Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Chapter 1 - Introduction Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation . . . . . . . . . . . . . . . . . . .
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COPYRIGHT This manual is copyrighted 8 2004 by Drawmer Electronics Ltd. With all rights reserved. Under copyright laws, no part of this publication may be reproduced, transmitted, stored in a retrieval system or translated into any language in any form by any means, mechanical, optical, electronic, recording, or otherwise, without the written permission of Drawmer Electronics Ltd. ONE YEAR LIMITED WARRANTY Drawmer Electronics Ltd.
PAGE 3
CHAPTER 1 DRAWMER DSL424 TWOPLUSTWO DYNAMICS INTRODUCTION The DSL424 provides the engineer with a 1U four channel comprehensive toolbox capable of solving the most complex dynamic problems. Incorporated in the 1U package are two industry standard frequency conscious noise gates and two soft/hard knee compressors with variable threshold limiting. The channels may be front panel configured as four individual stand alone processors, a stereo linked pair of comp/limiters with a stereo linked pair of gates.
PAGE 4
INSTALLATION The DSL424 is designed for standard 19" rack mounting and occupies 1U of rack space. Avoid mounting the unit directly above power amplifiers or power supplies that radiate significant amounts of heat and always connect the mains earth to the unit. Fibre or plastic washers may be used to prevent the front panel becoming marked by the mounting bolts.
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CHAPTER 2 CONTROL DESCRIPTION Noise Gate 1 Noise Gate 2 Compressor 1 Compressor 2 The Noise Gate Channels Both gate channels of the DSL424 are identical and may be used completely independently or linked for stereo channel operation. In the linked mode, only the left channel’s controls are functional and serve as master, though the channel bypass switches remain independent. When linked, the control signal is derived only from the programme material present at the input of the master channel.
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The Noise Gate Channels cont... L.F. 25Hz - 10kHz The Low Frequency filter works by severely attenuating frequencies below the cut-off frequency selected. H.F. 200Hz - 35kHz The High Frequency filter attenuates frequencies above the selected cut-off value. In other words, when both filters are set, it is the range between the two settings that is allowed to pass. Ext/Int In the INT position, this switch causes the gate to respond to the dynamics of the signal being processed.
PAGE 7
Ratio Sets the final compression ratio that will be applied once the threshold level is exceeded. The ratio may be continuously adjusted from 1.2:1 to infinity:1 allowing the possibility of true hard limiting. Gain During compression, the signal is attenuated depending on the dynamics of the signal. As a result, gain may need to be applied in order to produce the desired output level. The GAIN control has a range of -20dB to +20dB.
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CHAPTER 3 OPERATION The Noise Gate Channels The unit should be connected in-line with the signal to be processed via suitable insert points. Ensure, where possible, that the insert send and return level on your console approximately matches the operating level of the DSL424. For mono use, each channel may be considered as being completely independent and set up accordingly. For use with stereo signals, all setting up is then done using the noise gate 1 (left) channel's controls.
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Taking the example of the electric guitar, this produces little below 100Hz or above 3kHz so setting one channel of the DSL424 to Key Listen mode will enable you to use the filters to exclude much of the amplifier hum at the low end and hiss at the top end while having little effect on the sound of the guitar. Surprisingly, the same is true of the acoustic guitar; (even a bright-sounding steel-strung model), and the filters can be used to reduce the effect of string squeak or the player's breathing.
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CHAPTER 4 GENERAL INFORMATION It is the responsibility of the installer to ensure that the continuous power rating of the speakers is not exceeded, as Drawmer Electronics Ltd will not accept any responsibitlity for speaker damage caused by incorrect settings. IF A FAULT DEVELOPS CONTACTING DRAWMER For warranty service please call Drawmer Electronics Ltd. or their nearest authorised service facility, giving full details of the difficulty. Drawmer Electronics Ltd.
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DSL424 TWOPLUSTWO DYNAMICS DATA SPECIFICATION NOISE GATE CHANNELS COMPRESSOR / LIMITER CHANNELS INPUT INPUT Input Impedance 20k Ohms (Balanced) Max Input level +21dBuB (+17dB ref.
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BLOCK DIAGRAM DSL424 ver 01 B 29/06/04 12 DRAWMER DSL424 OPERATOR’S MANUAL
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DRAWMER DSL424 OPERATOR’S MANUAL 13 dB 10 1K 3K5 1K 2K 200 500 500 250 INT Hz 6 :1 3 1 RATIO 2 20 10 20 GAIN dB 0 BYPASS 20 10 OUTPUT LEVEL 5 0 5 10 10 dB 0 5 LEVEL dB 10 DRAWMER ELECTRONICS LTD ~ Coleman Street Rotherham ~ S. Yorkshire ~ UK © COPYRIGHT DRAWMER ELECTRONICS LTD 2004 1S 16 LINK 15 Master LINK Master dB 10 25 6 1.2 2 4 HARD SOFT Session No.