DRAWMER DS501 POWER GATE OPERATOR’S MANUAL CONTENTS SAFETY CONSIDERATION page 1 INSTALLATION page 1 INTRODUCTION page 2 CONTROL DESCRIPTIONS page 4 OPERATION page 6 IF A FAULT DEVELOPS page 11 CONTACTING DRAWMER page 11 TECHNICAL SPECIFICATION page 12 BLOCK DIAGRAM page 13 i
COPYRIGHT This manual is copyrighted © 2001 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.
DS501 OPERATORS’ MANUAL 1 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 80mA WHERE THE MAINS INPUT VOLTAGE SWITCH IS SET TO 230 VOLTS AC. AND 160mA WHERE THE MAINS INPUT VOLTAGE IS 115 VOLTS AC. ALL FUSES MUST COMPLY WITH IEC 60127-2. THE FUSE BODY SIZE IS 20mm x 5mm. CAUTION - MAINS CABLE DO NOT ATTEMPT TO CHANGE OR TAMPER WITH THE SUPPLIED MAINS CABLE.
2 DS501 OPERATORS’ MANUAL INTRODUCTION The Drawmer DS501 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.
DS501 OPERATORS’ MANUAL 3 POWER CONNECTION If the unit is to be operated at a mains input voltage which is different to that as supplied, the following must be carried out by a qualified technical engineer. 1: Disconnect the unit from the mains. 2: Using a number 1 size pozidrive screwdriver, remove the seven self-tapping screws that retain the top cover. Accessing the internal power switch and fuse 3. Set the voltage rating and replace the fuse. 4. Replace the cover.
4 DS501 OPERATORS’ MANUAL CONTROL DESCRIPTION L.F. 25Hz - 3KHZ The Low Frequency filter works by severely attenuating frequencies below the cut-off frequency selected. H.F. 250Hz - 30KHz 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. Note: Filters only effect the signal triggering the gate. See 'KEY LISTEN'.
DS501 OPERATORS’ MANUAL Gate/Duck 5 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'. Key Listen/ Gate/Bypass Key Listen allows the effect of the key filters on the programme material to be heard at the output.
6 DS501 OPERATORS’ MANUAL OPERATION Use the following diagrams as a guide when operating the DS501. Gating a Kick Drum.
DS501 OPERATORS’ MANUAL Gating a Snare Drum.
8 Triggering a Bass Guitar from a Kick Drum.
DS501 OPERATORS’ MANUAL Ducking Music from Vox.
10 DS501 OPERATORS’ MANUAL PEAK PUNCH Peak Punch is a dynamic feature which accelerates the leading edge as the gated signal opens, adding up to 12dB of gain for approximately 10mS with proprietary release characteristics. For percussive material such as drums, fast synthesised sounds or percussive guitar, the Peak Punch mode of operation will give the most dramatic results.
DS501 OPERATORS’ MANUAL 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.
12 DS501 OPERATORS’ MANUAL TECHNICAL SPECIFICATIONS (All measurements referenced to +4dBu operating level) INPUT IMPEDANCE 20KS MAXIMUM INPUT LEVEL +17dB OUTPUT IMPEDANCE 50S (bal) 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.
DS501 OPERATORS’ MANUAL 13 BLOCK DIAGRAM
