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.
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.
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.
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.
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.
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.
OPERATION Use the following diagrams as a guide when operating the DS201.
Gating a Snare Drum -9-
Triggering a Bass Guitar from a Kick Drum -10-
Ducking Music from Vox -11-
IF A FAULT DEVELOPS For warranty service please call Drawmer Electronics Ltd. Or their nearest authorised service facility, giving full details of the difficulty. On receipt of this information, service or shipping instructions will be forwarded to you. No equipment should be returned under the warranty without prior consent from Drawmer or their authorised representative. For service claims under the warranty agreement a service Returns Authorisation (RA) number will be given.
TECHNICAL SPECIFICATIONS INPUT IMPEDANCE 20KÙ MAXIMUM INPUT LEVEL +17dB OUTPUT IMPEDANCE 50Ù (bal) 100Ù (unbal) MAXIMUM OUTPUT LEVEL +17dB BANDWIDTH 23Hz to 31KHz -1dB NOISE AT UNITY GAIN ref 0dB, GATE open Wideband 22Hz - 22KHz CCIR ARM IEC A Q-Pk CCIR AV -90dB -95dB -95dB -97dB -84dB RMS -88dB -93dB -93dB -95dB DISTORTION 0dB input 100Hz 1KHz 10KHz < 0.025% < 0.025% <0.
BLOCK DIAGRAM -14-
