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Related Manuals for BSS Audio DPR 504
Summary of Contents for BSS Audio DPR 504
- Page 1 DPR 504 User Manual...
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Page 2: Important Safety Information
IT SHOULD NOT BE NECESSARY TO REMOVE ANY PROTECTIVE EARTH OR SIGNAL CABLE SHIELD CONNECTIONS TO PREVENT GROUND LOOPS. ANY SUCH DISCONNECTIONS ARE OUTSIDE THE RECOMMENDED PRACTISE OF BSS AUDIO AND WILL RENDER ANY EMC OR SAFETY CERTIFICATION VOID. For continued compliance with international EMC legislation ensure that all input and output cables are wired with the cable screen connected to Pin 1 of the XLR connectors and/or the jack plug sleeve. -
Page 3: Table Of Contents
Contents Contents Introduction Unpacking Mechanical installation Mains Power Connection Mains Power Audio Connections Main Inputs Main Outputs EXT Key Input Getting started Operating instructions Filter and Width Key listen Threshold Key level meter Gate open indicator Attack, release & hold Range Link 7.10... -
Page 4: Introduction
Introduction Introduction The BSS DPR 504 is a four channel professional noise gate which has been designed for simple and intuitive use, and yet is capable of producing the best results in a wide range of applications. It incorporates modern integrated circuit technology for high packing density and long term reliability. -
Page 5: Unpacking
Unpacking Mechanical Installation Unpacking As part of the BSS system of quality control, we check every product carefully before packing to ensure that it reaches you in flawless condition. Before you go any further, please check the unit for any physical damage and retain the shipping carton and all relevant packing materials for use, should the unit need returning. -
Page 6: Mains Power Connection
Mains Power Connection Fig 3.2 Rack dimensions. Mains Power Connection 4.1 Mains Power WARNING! THIS APPLIANCE MUST BE EARTHED. The DPR 504 must always be connected to a 3-wire earthed AC outlet. The rack framework must also be connected to the same grounding circuit. The unit must NOT be operated unless the power cables' EARTH (ground) wire is properly terminated - this is important for personal safety as well as for proper control over the system grounding. - Page 7 Note: For USA and Canadian users, the replacement fuse must be of an identical UL rated type fuse for continued compliance with safety standards. It is very unlikely that fuses will blow during normal use, but if replaced fuses continue to blow, then the internal transient suppressors may have become damaged.
- Page 8 The DPR 504 Fig 4.1 Front Panel Fig 4.2 Rear Panel...
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Page 10: Audio Connections
Audio Connections Audio Connections The DPR 504 is designed to operate at nominal line levels and not at microphone signal levels. The gating of microphone signals must be done after the mic-amp, or gain increase section of a mixing console input channel, and would generally occur at the pre-fader or pre-equaliser insert point of the particular channel. -
Page 11: Main Outputs
The outputs of each channel are electronically balanced and floating, and 5.2 Main Outputs provide ample power to drive all professional and semi-professional audio equipment whose input impedance is 600 ohms or greater. The nominal input impedance will be the same as the input level when the gate is 'open', as the DPR 504 makes no gain contribution. -
Page 12: Getting Started
Getting started Getting started The instructions in this section are intended to help those people unfamiliar with noise gates and their terminology, and to provide a means of 'getting started'. The DPR 504 has been designed to need the minimum of operator knowledge and setup procedures, and is capable of producing excellent results with the adjustment of only one control. - Page 13 used, and the key level meter has been designed to provide accurate information for a whole range of operation methods. The threshold control is the most important control on the gate and is the only one that will need adjusting to perform simple gating. These controls can be separated into three classifications depending on their function and usage on the gate.
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Page 14: Operating Instructions
Operating Instructions Control operations Control operations Control operations Control operations Control operations Operating instructions 7.1 Filter and Width These two controls adjust the internal key side-chain filters, and a set of response curves are given in figure 7.1. These filters are used to control the frequency content of the signal being sent to the gate control circuitry and allow the filtering-out of information not required to control the gating action. -
Page 15: Key Listen
Fig 7.1 Key side-chain filter response 7.2 Key listen This momentary switch allows the operator to listen to the program material after it has been processed by the key filters. This also applies to any external equipment connected via the EXT key input socket. In application it would be used during the setup of the side-chain key filter and width controls, as it is often easier to more accurately set them whilst listening to their effect. -
Page 16: Threshold
Operating Instructions 7.3 Threshold As previously mentioned in 'getting started', the threshold control is one of the most important functions on any gate, and is used to set the level at which the gate open sequence will commence, in relation to the input program signal level. -
Page 17: Gate Open Indicator
very 'safe' gating such as for vocals, the signal will show nearer full scale, and for critical close-mic gating such as for drums, the signal peaks will show only a few dBs above the 0dB threshold point. 7.5 Gate open indicator The triangular LED mounted underneath the 0dB scale point of the key level meter is provided to give a visual indication of the actual activity of the gate... - Page 18 Operating Instructions gate 'chattering' on and off during natural short pauses in program material, such as speech. It always precedes the start of release. To minimise operator set up time, the DPR 504 incorporates the hold function by combining it with the release function.
- Page 19 Notice, that once the attack sequence has been initiated by an event (that is the key side-chain signal has exceeded 0dB on the key level meter) it will continue through to the end of the timing cycle regardless as to whether the key signal has since fallen below 0dB threshold.
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Page 20: Range
Operating Instructions 7.7 Range This switch sets the difference in program signal level between its value when the gate is open to that when it is closed, and is marked in dBs. Figure 7.3 indicates this effect. Fig 7.3 Range control The output program signal level when the gate is open is the same as the input level, and is taken to be 0dB relative. -
Page 21: Link
7.8 Link Both channel 2 and channel 4 on the DPR 504 have a push switch which alters the normal operational mode of the unit from four separate channels of gates into one in which channel 1 plus 2 and channel 3 plus 4 work together. The first group is operated by the controls of channel 1 only;... - Page 22 Operating Instructions This allows the gate to be triggered by an event that is not the same program event connected to the input connector. In application this allows the gate channel to be controlled by two other methods. Firstly, a totally independent signal can be connected at this point, such that the gate will be triggered open by an event which is not related to the program appearing at the input connector.
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Page 23: Service Section
Figure 8.1 shows the suppressors location on the voltage selector board. Fig 8.1 Suppressor location !!! WARNING - Refer all servicing to qualified service personnel !!! Risk of electric shock if the unit is opened. BSS Audio accepts no responsibility for injury subsequent to opening of the unit. -
Page 24: Separating Signal And Chassis Ground
Fig 8.2 Chassis link location !!! WARNING - Refer all servicing to qualified service personnel !!! Risk of electric shock if the unit is opened. BSS Audio accepts no responsibility for injury subsequent to opening of the unit. -
Page 25: Warranty Information
Warranty Information Warranty Information When sold to an end user by BSS Audio or a BSS Audio Authorised Reseller, this unit is warranted by the seller to the purchaser against defects in workmanship and the materials used in its manufacture for a period of one year from the date of sale. -
Page 26: Specifications
Specifications 10.0 Specifications Input section Impedance Balanced 12k ohm differential Headroom +20dBv CMRR >-50dB 20Hz-20kHz Connector XLR3-31 or equivalent style Output section Impedance Balanced and floating to drive 600 ohm loads Headroom +20dBv into 600 ohm load Frequency +/-1dB 20Hz to 20kHz. Ultrasonic low pass filter Response -3dB at 32kHz Noise Measured to CCIR 468-2 Zero attenuation <-86dBv... -
Page 27: Index
Index Index Attack Mains fusing Audio Connections Mains power connection Chassis ground Outputs separating from signal Rack dimensions Dimensions Range rack Rear Panel unit Release Specifications EXT Key Input Threshold Features Transient suppressor Filter replacement Front Panel Transient suppressors Fusing Unpacking Gate open Getting started... -
Page 28: User Notes
User Notes...
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