Drawmer DS201 User Manual

DRAWMER

DS201

DUAL NOISE GATE

OPERATOR’S MANUAL

CONTENTS

SAFETY CONSIDERATION page 3

INSTALLATION page 3

INTRODUCTION page 4

CONTROL DESCRIPTIONS page 6

OPERATION page 8

IF A FAULT DEVELOPS page 12

CONTACTING DRAWMER page 12

TECHNICAL SPECIFICATION page 13

BLOCK DIAGRAM page 14

COPYRIGHT

This manual is copyrighted © 2008 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 this product 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 [phone]. 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 or
unauthorised repair.

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.

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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SAFETY CONSIDERATIONS

CAUTION - MAINS FUSE

TO REDUCE THE RISK OF FIRE REPLACE THE MAINS FUSE ONLY WITH THE

SAME TYPE, WHICH MUST BE A CLASS 3, 230 VOLT, TIME DELAY TYPE,
RATED AT 32mA WHERE THE MAINS INPUT VOLTAGE SWITCH IS SET TO 230
VOLTS AC. AND 63mA WHERE THE MAINS INPUT VOLTAGE IS 115 VOLTS AC.

ALL FUSES MUST COMPLY WITH IEC 127-2.

THE FUSE BODY SIZE IS 20mm x 5mm.

CAUTION - MAINS CABLE

DO NOT ATTEMPT TO CHANGE OR TAMPER WITH THE SUPPLIED MAINS

CABLE.

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.

INSTALLATION

This product is designed for standard 19" rack mounting and occupies 1U of rack space.
Use four M6 pan head screws to secure the unit into the rack. Fibre or plastic washers may
be used to prevent the front panel becoming marked by the mounting bolts.

! Care should be taken in the choice of positioning. The unit should not be mounted

where other equipment obstructs the normal air flow. The unit should not be situated
near any heat source, such as a radiator, stove or a high power amplifier that would
generate heat.

! The DS201 should not be operated near any water or in a location where moisture

might be present.

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INTRODUCTION

The Drawmer DS201 is a sophisticated dual channel noise gate, which may be used as two
independent channels or linked for true stereo operation. It incorporates a number of
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;
! Comprehensive envelope control, attack, hold, decay and range;
! Extremely low-noise and low-distortion circuitry;
! Ultra-fast response time;
! Comprehensive side-chain filtering;
! 'Key listen' facility;
! 'Traffic light' display giving clear indication of gate status;
! Balanced inputs and outputs.

These features and the DS201's user-friendliness have helped it to become the worldwide
'industry standard' noise gate.

AUDIO CONNECTIONS

All input and output connectors are balanced XLRs, with the wiring convention being: pin 2
hot, pin 3 cold and pin 1 ground. For unbalanced operation, it is important to short pin 3 of
the XLR connector to ground (pin 1) at both input and output.

Key inputs are made via ¼" mono jack connectors. If the Key jack sockets are permanently
wired to a patch bay, it is important that the patch bay sockets are fully normalised to
prevent random unwanted triggering.

If earth loop problems are encountered, never disconnect the mains earth but instead, try
disconnecting the output signal screen at one end of the cables connecting the DS201 to
the patchbay, we suggest inside the XLR connector itself. If such measures are necessary,
balanced operation is recommended.

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POWER CONNECTION

The unit will have been 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, and no other.

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.

1: Disconnect the unit from the mains.

2: Remove the two self-tapping screws that hold the voltage selection switch

cover-plate onto the rear panel.

3: Remove the cover plate and slide the switch fully to its opposite end.

4: Rotate the cover plate one half turn, (180E) and refit the two screws.

5: Replace with a correctly rated fuse for the selected operation voltage.

6: Re-connect to mains power source.

Never disconnect the earth from the mains supply

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