DRAWMER
DS101
NOISE GATE
FOR THE
500 SERIES RACK SYSTEM
CONTENTS
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Consideration . . . . . . . . . . . . . . . . . . 2
Radio Frequencies Statement . . . . . . . . . . . 2
Chapter 1 - Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . 4
Audio Connection . . . . . . . . . . . . . . . . . . . 4
Typical Connection Guide . . . . . . . . . . . . . 5
Chapter 2 - Control Description
The Gate Controls . . . . . . . . . . . . . . . . . . . 6
The Key Filters. . . . . . . . . . . . . . . . . . . . . . 8
Quick Start Guide . . . . . . . . . . . . . . . . . . . 9
Noise Gate Operation . . . . . . . . . . . . . . . .10
Chapter 3 - General Information
If a fault develops. . . . . . . . . . . . . . . . . . . . 15
Contacting Drawmer. . . . . . . . . . . . . . . . .15
Specification . . . . . . . . . . . . . . . . . . . . . . . 15
Block Diagram. . . . . . . . . . . . . . . . . . . . . . 16
Session Recall Sheet . . . . . . . . . . . . . . . 17
DRAWMER
COPYRIGHT
This manual is copyrighted © 2012 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., warrants the Drawmer DS101 Noise Gate to conform substantially to the specifications of this manual for a period of one year from the original date of purchase when used in accordance with the specifications detailed in this manual. In the case of a valid warranty claim, your sole and exclusive remedy and Drawmer’s entire liability under any theory of liability will be to, at Drawmer’s discretion, repair or replace the product without charge, or, if not possible, to refund the purchase price to you. This warranty is not transferable. It applies only to the original purchaser of the product.
For warranty service please call your local Drawmer dealer. Alternatively call Drawmer Electronics Ltd. at +44 (0)1709 527574. Then ship the defective product, with transportation and insurance charges pre-paid, to Drawmer Electronics Ltd., Coleman Street, Parkgate, Rotherham, S62 6EL UK. Write the RA number in large letters in a prominent position on the shipping box. Enclose your name, address, telephone number, copy of the original sales invoice and a detailed description of the problem. Drawmer will not accept responsibility for loss or damage during transit.
This warranty is void if the product has been damaged by misuse,
modification, unauthorised repair or installed with other equipment that proved to be faulty.
THIS WARRANTY IS IN LIEU OF ALL WARRANTIES, WHETHER ORAL OR WRITTEN, EXPRESSED, IMPLIED OR STATUTORY. DRAWMER MAKES NO OTHER WARRANTY EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. PURCHASER’S SOLE AND EXCLUSIVE REMEDY UNDER THIS WARRANTY SHALL BE REPAIR OR REPLACEMENT AS SPECIFIED HEREIN.
IN NO EVENT WILL DRAWMER ELECTRONICS LTD. BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY DEFECT IN THE PRODUCT, INCLUDING LOST PROFITS, DAMAGE TO PROPERTY, AND, TO THE EXTENT PERMITTED BY LAW, DAMAGE FOR PERSONAL INJURY, EVEN IF DRAWMER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Some states and specific countries do not allow the exclusion of implied warranties or limitations on how long an implied warranty may last, so the above limitations may not apply to you. This warranty gives you specific legal rights. You may have additional rights that vary from state to state, and country to country.
For the USA
FEDERAL COMMUNICATIONS COMMISSION RADIO
FREQUENCY INTERFERENCE STATEMENT
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off an on, then the user is encouraged to try to correct the interference by one or more of the following measures:
Re-orient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Unauthorised changes or modification to this system can void the users’ authority to operate this equipment.
This equipment requires shielded interface cables in order to meet FCC class B limit.
|
For Canada |
CLASS B |
NOTICE |
This digital apparatus does not exceed the Class B limits for radio noise emissions set out in the Radio Interference Regulations of the Canadian Department of Communications.
CLASSE B AVIS
Cet appareil numérique ne dépasse pas les limites de la classe B au niveau des émissions de bruits radioélectriques fixés dans le Règlement des signaux parasites par le ministère Canadien des Communications.
SAFETY CONSIDERATIONS
CAUTION - SERVICING 
DO NOT PERFORM ANY SERVICING. REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING 
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE.
WARNING 
PLEASE BE SURE TO POWER OFF YOUR 500 SERIES RACK BEFORE INSTALLING OR REMOVING THIS OR ANY OTHER 500 SERIES MODULE. HOT SWAPPING COULD CAUSE DAMAGE TO THIS OR OTHER EQUIPMENT.
In the interests of product development, Drawmer reserve the right to modify or improve specifications of this product at any time, without prior notice.
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CHAPTER 1
DS101
NOISE GATE FOR THE
500 SERIES RACK SYSTEM
The Industry-Standard High-End Noise-Gate comes to the 500 Series!
The DS101 is the first noise gate designed specifically for the 500 Series rack system and takes its place alongside the Drawmer family of industry standard Noise Gates, such as the DS201, DS501 and DS404. Anyone familiar with those units will immediately be at home with the DS101.
Based on a single-channel of the DS201 the DS101 is a sophisticated noise gate incorporating a number of features pioneered by Drawmer, which are invaluable to the sound engineer, such as variable high and lowpass filters for “frequency conscious gating.” Other features include comprehensive envelope control, attack, hold, decay, and range, plus a whole host of other features, all adding up to one amazing processor.
When placed side by side in a 500 series rack two or more gates can be linked using the new infra red triggering mechanism employed on the DS101. This means that any number of gates can be linked with each having their own envelope shaping whilst the trigger pulse passes through unchanged, this opens up a whole world
of “envelope follower” effects limited only by your imagination.
Drawmer DS101 single-channel Noise Gate Features at a Glance:
Fully featured noise gate based on the industry standard DS201.
Takes up a single 500 series slot.
Proprietary Hysteris or “trigger stabilization” to prevent “chatter” around the threshold.
Fully variable high pass and low pass filters for “frequency conscious” gating.
Comprehensive envelope control, attack, hold, decay, and range.
External triggering via key input or the new IR trigger pulse from another DS101.
“Key Listen” facility.
Extremely fast attack time, to preserve the natural attack of the sound.
Linkable - up to ten units in one rack space.
Drawmer “traffic lighting” metering.
Can be used for “Gating” or “Ducking”. 
Low noise design.
DS101 - Noise Gate for 500 Series Systems |
3 |
DRAWMER
INSTALLATION
Congratulations on purchasing your new Drawmer product. In order to protect your new investment, please take a few moments to fill out the warranty registration card provided in the box, or alternatively visit our website at www.drawmer.com and fill out the form online.
Quick and easy to do, registering your audio product is important and helps to serve as proof of ownership for any future warranty issues.
The DS101 does not function stand alone and requires the power supply and the audio connectors provided by an API 500 series compatible rack frame (not included).
Installing the DS101 into a 500 Series compatible rack.
1.Before you install anything be sure to turn off the 500 series rack and unplug it from the mains supply. The 500 Series have not been designed for ‘hot swapping’ and doing so could damage this and other products within the unit, making any warranty void.
2.After removing the DS101 from its packaging locate a single free slot per DS101. Note that if you are installing more than one DS101 locate them in slots adjacent to each other so that the linking feature can work.
3.Whilst looking down into the 500 series rack ensure that the DS101 card edge connectors line up with the EDAC type connector of the rack, then gently push the DS101 in place keeping it as square as possible until it is fully located. Do not use excessive force!
4.Tighten the two front panel screws.
5.Connect the XLR cables to the rear and power up the rack. The DS101 will power automatically and should be ready to use.
AUDIO CONNECTIONS
The inputs and outputs found on the back of the 500 rack are electronically balanced on conventionally wired XLRs (pin 1 screen, pin 2 hot, pin 3 cold and XLR shell is connected to chassis).
The use of balanced wiring is recommended.
(Please consult your 500 series manual for further information).
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TYPICAL CONNECTION GUIDE
DS101 - Noise Gate for 500 Series Systems |
5 |
DRAWMER CHAPTER 2
CONTROL DESCRIPTION
The DS101 noise gate incorporates many impressive features, many pioneered by Drawmer, which are invaluable to the sound engineer and not found on conventional noise gates:
• Variable high-pass and low-pass filters for ‘frequency conscious’ gating, with ‘Key listen’ facility.
• Comprehensive envelope control, attack, hold, decay and range.
• Ultra-fast response time.
• ‘Traffic light’ display giving clear indication of gate status as well as Threshold Metering.
• Key input for external triggering.
• Linking. Each DS101 can be linked to another whilst still retaining independent envelopes.
• Can be used for "Gating" or "Ducking".
• High audio specification.
These features are based on the industry standard, DS201 Noise Gate manufactured by Drawmer since 1981.
The Gate Controls
Threshold Infinite to -62.0dB
Sets the level below which gating starts to take place. For normal noise removal applications, it is usual to set the Threshold as low as is possible without spurious triggering occurring, so that none of the desired signal is lost. The meter above clearly shows the threshold level in response to the actual signal.
Attack 10uS to 1S
Controls the speed that the gate opens. The fastest Attack time ensures that the gate does not clip the leading edge of extremely fast signals.
Hold 2mS to 2 Seconds Determines the amount of time the gate is held open after the signal falls below the Threshold. This helps to prevent spurious re-triggering when using fast Release times, but is also instrumental in creating the classic gated reverb sound which is often applied to drums.
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