Related Manuals for Drawmer DL241
Summary of Contents for Drawmer DL241
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Page 1: Table Of Contents
DL241 DUAL AUTO COMPRESSOR OPERATORS MANUAL CONTENTS SAFETY CONSIDERATIONS page 1 INTRODUCTION page 2 INSTALLATION page 3 CONTROL DESCRIPTIONS page 5 OPERATION page 8 IF A FAULT DEVELOPS page 10 CONTACTING DRAWMER page 10 TECHNICAL SPECIFICATION page 11 BLOCK DIAGRAM... - Page 2 COPYRIGHT This manual is copyrighted © 1995 by Drawmer Electronics, Ltd. With all rights reserved. Under copyright laws, this manual may not be duplicated in whole or in part without the written consent of Drawmer. ONE YEAR LIMITED WARRANTY Drawmer Electronics Ltd., warrants the Drawmer DL241 audio processor to...
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Page 3: Safety Considerations
DL241 OPERATORS’ MANUAL DRAWMER DL241 Dual Auto Compressor SAFETY CONSIDERATIONS CAUTION - MAINS FUSE TO REDUCE THE RISK OF FIRE REPLACE THE MAINS FUSE ONLY W ITH THE SAME TYPE, W HICH MUST BE A CLASS 3, 230 VOLT, TIME DELAY TYPE, RATED AT 32mA W HERE THE MAINS INPUT VOLTAGE SWITCH IS SET TO 230 VOLTS AC. -
Page 4: Introduction
A further feature of the DL241 is a peak limiter which allows the user to set an absolute output signal level that will not be exceeded. If the peak limiter threshold is exceeded for more than a few milliseconds, additional gain reduction will be applied to reduce the overall signal level to within accepted limits without distortion. -
Page 5: Installation
DL241 OPERATORS’ MANUAL INSTALLATION The DL241 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. Fibre or plastic washers may be used to prevent the front panel becoming marked by the mounting bolts. - Page 6 DL241 OPERATORS’ MANUAL POWER CONNECTION The unit will be supplied with a power cable suitable for domestic power outlets in your country. For your own safety it is important that you use this cable. The unit should always be connected to the mains supply earth using this cable If for some reason the unit is to be used at a mains input operating voltage which is different to that as supplied, the following procedure must be carried out.
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Page 7: Control Descriptions
DL241 OPERATORS’ MANUAL CONTROL DESCRIPTION Both channels of the DL241 are identical and may be used completely independently or linked for stereo operation. In the linked mode, only the left hand channel controls are functional and serve as master controls, though the channel bypass switches remain independent. - Page 8 DL241 OPERATORS’ MANUAL COMPRESSOR Threshold: Determines the input level above which gain reduction will be applied and may be set in the range -40 to +20dB. Soft knee compression takes place for signals exceeding the threshold level by up to 10dB above which level, conventional 'ratio' compression is applied.
- Page 9 This feature enables the unit to pass audio even with no power applied to the DL241. Normally the switch is used to compare the raw unprocessed signal verses with any expansion, compression and limiting of the audio input.
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Page 10: Operation
The unit should be connected in line with the signal to be processed via suitable insert points. Ensure that the insert send and return level on your console matches the operating level set up using the rear panel push-buttons on the DL241. If not, select the appropriate operating level on the DL241. - Page 11 In extreme cases, it may be necessary to add a little artificial brightness to the processed sound using equalisation or some form of exciter, though the semi-soft-knee compression system used in DL241 tends to minimise this side effect.
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Page 12: If A Fault Develops
Drawmer Electronics Ltd., will be pleased to answer all application questions to enhance your usage of this equipment. Please address correspondence to: Drawmer (Technical Help line) : Coleman St.: Parkgate : Rotherham : S62 6EL : UK or, E-mail us on : tech@drawmer.com... -
Page 13: Technical Specification
DL241 OPERATORS’ MANUAL TECHNICAL SPECIFICATIONS (Measurements taken at +4dBu operating level where applicable) INPUT IMPEDANCE 20KÙ MAXIMUM INPUT LEVEL +20dBu OUTPUT IMPEDANCE 50 Ù (bal), 100 Ù (unbal) MAXIMUM OUTPUT LEVEL +20dBu BANDWIDTH <10Hz to 22KHz -1dB NOISE AT UNITY GAIN with Expander Off... -
Page 14: Block Diagram
DL241 OPERATORS’ MANUAL BLOCK DIAGRAM...
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