Drawmer DS201 Manuel utilisateur

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

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 +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 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.

-2-

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.

-3-

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.

-4-

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

-5-

CONTROL DESCRIPTION

L.F. 25Hz - 4kHz

The Low Frequency filter works by severely attenuating frequencies

below the cut-off frequency selected.

H.F. 250Hz - 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.

Threshold -50dBFs - infinate

Sets the level at which the gate opens.

Attack 10uS - 1 Second

This control determines how quickly the gate opens. The fastest

Attack time ensures that the gate does not clip the leading edge of

extremely fast transients.

Note: See section on using Attack under 'OPERATION'

Hold 2mS - 2 Second

Determines the amount of time the gate is held open after the signal

falls below the Threshold.

Decay 2mS - 4 Second

Determines the rate at which the gate closes, once the signal has

fallen below the Threshold and the Hold time has expired.

Range 0dB - 90dB

Sets the amount of attenuation applied to the signal when the gate is

closed. This enables the gate to remove unwanted signals entirely, or

simply to attenuate signals which are too loud.

Note: This control is active on both channels, even in stereo linked

operation

Ext/Int In the Int position, this switch causes the gate to respond to the

dynamics of the signal being processed.

In the Ext position, an external audio signal fed to the key input is

used to control the gate, making it possible to gate one sound using

another, independent signal.

Gate/Duck Switches from normal Gating to Ducking, for applications such as

voice-over or the removal of 'clicks' and 'pops'.

Note: See later sections on Ducking under 'OPERATION' and

'APPLICATIONS.'

-6-

Key Listen/

Gate/Bypass When this switch is set to Key Listen, the effect of the key filters on

the programme material is heard at the output. In normal operation,

the Gate position is selected; the filters only affect the way the DS201

responds to the incoming programme material - they do not have any

direct effect on the output signal. The Bypass position routes the

input signal to the output with no processing.

Note: It is possible to leave the switch in the Key Listen position in

order to use the DS201 simply as a filter rather than a gate.

Display The famous Drawmer “traffic light” display shows gate status.

Gate Closed Hold Time Gate Open

Stereo Link This switch links both channels for two tracking channel operation,

with channel one being master. The trigger source selected for

channel one will actuate both channels' envelopes when this mode is

selected.

Note: See section on Linking under 'APPLICATIONS'.

-7-

OPERATION

Use the following diagrams as a guide when operating the DS201.

Gating a Kick Drum

-8-

Gating a Snare Drum

-9-

Triggering a Bass Guitar from a Kick Drum

-10-

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