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Behringer Denoiser SNR2000 User Manual

Behringer Denoiser SNR2000
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DENOISER
®
SNR2000
Version 2.3 June 2002
Users Manual
www.behringer.com
ENGLISH
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Behringer Denoiser SNR2000 Specifications

General IconGeneral
Channels2
Inputs2 x XLR, 2 x 1/4" TRS
Outputs2 x XLR, 2 x 1/4" TRS
Signal-to-Noise Ratio>100 dB
THD<0.05%
Dynamic Range>100 dB
Frequency Response20 Hz to 20 kHz

Summary

SAFETY INSTRUCTIONS

DETAILED SAFETY INSTRUCTIONS

Provides comprehensive guidelines for safe operation and maintenance of the unit.

FOREWORD

1. INTRODUCTION

1.1 The design concept

Explains the philosophy behind Behringer product design and component selection.

1.2 Before you begin

Provides essential pre-operation checks, installation advice, and power connection guidelines.

1.3 Front panel controls

Details the layout and function of all controls and indicators on the front panel.

1.4 Rear panel connectors

Describes the connectors and features available on the rear panel of the unit.

2. OPERATION

2.1 Operation of the filter section

Explains how the Denoiser's filter section functions and its effects.

2.1.1 The masking effect

Explains how the Denoiser uses the masking effect to make noise inaudible.

2.1.2 The dynamic low-pass filter

Describes the function and operation of the dynamic low-pass filter.

2.2 The TAC filter of the DENOISER

Details the Transient Attack Control filter for fast signal response without distortion.

2.2.1 SENSITIVITY control

Explains how the sensitivity control affects the dynamic filter's opening threshold.

2.2.2 CUT OFF control

Describes the function of the CUT OFF control for setting the filter's lower frequency limit.

2.2.3 RELEASE control

Provides guidance on setting the release time for the dynamic filter for optimal results.

2.2.4 AUTO switch

Explains the AUTO switch function for automatic control of release time and cut off frequency.

2.2.5 FREQUENCY meter

Details the 8-digit LED meter indicating the filter's operating point and bandwidth.

2.3 Operation of the expander section

Introduces the expander section and its role in reducing interference noise.

2.4 The IRC expander of the DENOISER

Describes the Interactive Ratio Control expander and its adaptive ratio characteristic.

2.4.1 THRESHOLD control

Explains how to set the operating level for the expander section.

2.4.2 RELEASE control

Details the function of the RELEASE control for the downward expander's time constant.

2.4.3 RATIO control

Describes the RATIO control for adjusting the expansion ratio and its effect on gate/expander function.

2.4.4 GAIN REDUCTION meter

Explains the 8-LED gain reduction meter indicating the expander's activity.

2.5 The COUPLE function

Explains how to link channels for stereo tracking and control adjustments.

3. APPLICATIONS

3.1 Initial settings of the DENOISER

Provides recommended initial settings as a starting point for various applications.

3.2 Studio applications

Discusses specific applications of the Denoiser within studio environments.

3.2.1 Noise reduction during playback

Details how to use the Denoiser for noise reduction during audio playback.

3.2.2 Noise reduction during recording

Explains how to integrate the Denoiser into the recording path for enhanced noise reduction.

3.2.3 Reducing noise on subgroups, monitor and effects buses

Describes methods for reducing noise on mixer subgroups, monitor, and effects buses.

3.2.4 Noise reduction for effects devices

Explains how to reduce noise generated by external effects units.

3.2.5 Noise reduction during tape duplication

Details the use of the Denoiser to improve the quality of tape copies.

3.2.6 Noise reduction for instruments

Explains how to reduce noise from digital instruments like synthesizers and samplers.

3.2.7 Reducing noise in P.A. systems

Describes how to reduce hum and noise in public address (PA) systems.

3.2.8 Noise reduction in Hi-Fi and video applications

Explains how to use the Denoiser for noise reduction in Hi-Fi and video systems.

4. TECHNICAL BACKGROUND

4.1 What are audio dynamics?

Explains the concept of audio dynamics and the dynamic range of various devices.

4.2 Compressors/limiters

Discusses the function and application of compressors and limiters in audio processing.

4.3 Expanders/noise gates

Explains the principles of expanders and noise gates for reducing unwanted signals.

4.4 Downward expansion

Details the concept of downward expansion for attenuating signals below a threshold.

4.5 Noise as physical phenomenon

Explains the origins of electrical and tape noise as physical phenomena.

4.6 Companders

Discusses compander systems and their limitations in noise reduction.

4.7 The "single-ended" principle

Explains the single-ended noise reduction approach used by the Denoiser.

5. INSTALLATION

5.1 Rack mounting

Provides instructions for mounting the unit in a standard 19-inch equipment rack.

5.2 Audio connections

Details the servo-balanced inputs and outputs and connection guidelines.

6. SPECIFICATIONS

Analog inputs

Lists the specifications for the analog input connectors, type, impedance, and levels.

Analog outputs

Lists the specifications for the analog output connectors, type, impedance, and levels.

System specifications

Details overall system specifications including bandwidth, noise, THD, and crosstalk.

Expander section

Lists the threshold, release, and ratio specifications for the expander section.

Filter section

Lists the sensitivity, release, and cut-off specifications for the filter section.

Function switches

Lists the specifications for function switches like IN/OUT, AUTO, and COUPLE.

Indicators

Details the specifications for the LED gain reduction and filter bandwidth indicators.

Power supply

Specifies mains voltages, fuse types, power consumption, and connection requirements.

Physical

Provides physical dimensions and weight specifications for the unit.

7. WARRANTY

§ 1 WARRANTY CARD/ONLINE REGISTRATION

Outlines the process for registering the product to obtain extended warranty coverage.

§ 2 WARRANTY

Details the product's warranty coverage, terms, and limitations.

§ 3 RETURN AUTHORIZATION NUMBER

Explains the procedure for obtaining a return authorization number for warranty service.

§ 4 WARRANTY REGULATIONS

Specifies the regulations and conditions applicable to warranty services and claims.

§ 5 WARRANTY TRANSFERABILITY

Clarifies that the warranty is exclusive to the original buyer and not transferable.

§ 6 CLAIM FOR DAMAGES

Defines the limits of liability for damages and claims against the manufacturer.

§ 7 OTHER WARRANTY RIGHTS AND NATIONAL LAW

Addresses statutory buyer rights and national law in relation to the warranty.

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