Amek System 9098 User Manual

Compressor limiter

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System 9098

Compressor

Limiter

Serial No: A

For convenience, write your serial number in the box above and

keep this guide in a safe place. The number can be found on the

rear of the product and also on the Authentification Certificate.

This number MUST be quoted in all communications in order to

obtain technical support and spare parts from either the factory or

your dealer.

by Rupert Neve the designer

User

Guide

IMPORTANT

Table of Contents

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Page 1 System 9098 Compressor Limiter by Rupert Neve the designer User Guide Serial No: A IMPORTANT For convenience, write your serial number in the box above and keep this guide in a safe place. The number can be found on the rear of the product and also on the Authentification Certificate.
Page 2 Information contained in this manual is subject to change without notice and does not represent a commitment on the part of the vendor. AMEK shall not be liable for any loss or damage whatsoever arising from the use of information or any error contained in this manual or through any mis-operation or fault in hardware or software contained in the product.
Page 3: Table Of Contents
Contents Unpacking Safety Safety symbols Earthing Changing the fuse Mains Cable 100V/220V operation Installation Location Rack mounting Power up and clicks Cleaning Audio Connections Overview by Rupert Neve Block Diagram Operational Guide Compressor Controls Limiter Controls Ambience Meter Controls Master Controls 10dB Pad ST Link Specifications...
Page 4: Check List
Unpacking Check List The following items are included with the product. It is recommended that packaging materials are retained until all expected items are accounted for and found to be operating correctly. Carton Packet containing: 4 off M6 mounting screws 4 off plastic washers 1 off fuse for 110V operation.
Page 5 IMPORTANT SAFETY INSTRUCTIONS Safety Caution For your own safety and to avoid invalidation of warranty, all text marked with these Safety Symbols should be read carefully! Please keep this information! Caution Warning Important information. Hazards or unsafe Hazards or unsafe Read this before practices which can practices which can...
Page 6 Safety WARNING - For your own safety and to avoid invalidation of the warranty please read this section carefully. Do not place the apparatus on an unstable surface. Do not insert objects through any apertures. Do not use this apparatus near water. Unplug the unit before cleaning.
Page 7: Mains Cable
IMPORTANT SAFETY INSTRUCTIONS Mains Cable The supplied IEC mains cable must be terminated correctly to the AC mains supply before use. Use only an approved AC plug or power distribution device. The three cores are colour coded as follows: Green/Yellow Safety Earth The Green/Yellow core in the mains Brown...
Page 8 Sécurité Précaution Pour votre sécurité et afin de ne pas interrompre la garantie il est important de lire attentivement les paragraphes marqués d'un symbole! Conserver ce document! Avis Avertissement Importante information. Dangers ou pratiques Dangers ou pratiques Priere de lire dangereuses pouvant dangereuses pouvant avant utilisation.
Page 9 INSTRUCTIONS DE SÉCURITÉ IMPORTANTES Cable de Secteur Le cable de secteur IEC fourni doit être correctement au cable d'alimentation avant l'utilisation. Protéger le cordon d'alimentation afin d'éviter qu'il soit piétiné, écrasé ou pincé, en particulier au niveau des prises de courant, des fiches femelles et des points de sorties de l'appareil.
Page 10: Installation
Installation Location This product is designed and screened to minimise internal electromagnetic emissions and provide immunity to external electromagnetic fields. To reduce the risk of performance degradation due to external interference, do not site this unit close to sources of strong magnetic fields such as power supplies, power amplifiers, loudspeakers etc.
Page 11: Audio Connections
Audio Connections Earth Link The CHASSIS GROUND post is internally connected to both the case and the safety earth. If the link is removed for technical reasons (such as earth loops), then the ANALOGUE GROUND post must be wired separately to the installation technical earth point. Audio Connections Two identical sets of 3 pin XLR connectors are provided for each compressor channel A and B.
Page 12: By Rupert Neve
Overview Rupert Neve Each section of the RNCL has a compressor and a limiter which can be adjusted independently of each other. The following discussion describes the behaviour of compressors and limiters and the purpose of each type of control. Compression For signals below a "certain"...
Page 13 A signal which is 10dB above the threshold on a compressor with a 5:1 ratio will be reduced in level so that it is only 2dB above the threshold at the output. With a fixed threshold, the amount of gain reduction increases with higher ratio settings. Threshold The other major variable is the amount by which the +20 dBu...
Page 14 Overview Attack Time The compressor "attack" control adjusts the rate at which it begins to compress. If it is set to a short time (fast attack), gain changes occur quickly. Slower attack times mean that gain reduction hardly occurs at all before the transient has passed. Typical programme material contains transients ("spikes") which may cause gain reduction to occur.
Page 15: Block Diagram
Block Diagram...
Page 16: Operational Guide
Operational Guide Attack Changes the time over which Threshold compression begins to occur. Adjusts the level setting at which gain reduction begins to occur. Release Determines the time taken for gain reduction to stop being Ratio applied. Changes the severity of gain reduction once the signal exceeds the threshold setting.
Page 17 Side Chain In Both channels of the RNCL use two audio paths. The primary path carries the input signal, passes it through the gain reduction device and provides the output. The secondary path receives the same input signal but processes it to determine the gain reduction to be applied.
Page 18: Output Gain
Operational Guide Level Release Sets the maximum signal level Changes the time taken for gain reduction which passes through the limiter. to return to zero after limiting. Fast Attack Selecting "fast" allows even short term transients to cause gain reduction. Limiter Output Gain Compression and limiting cause the output signal...
Page 19: Ambience
Ambience The ambience switch is a unique feature of the RNCL which allows background (ambient) noise to be reduced and is best If controls are adjusted so that no gain understood by listening to it. reduction takes place, the input and the output signals are identical with the When ambience is selected, the output difference between them being zero.
Page 20 Operational Guide Applications A variety of special effects can be created using the ambience mode. One Before switching to ambience mode, the of the most useful is a reduction in the compressor should be adjusted to give a background audio that may be behind modest degree of compression, perhaps a "foreground"...
Page 21: Gain Reduction
Gain reduction When selected to "G/R" the meter indicates '0' in the absence of an input signal or any gain reduction. If the signal exceeds the compression threshold or limit level, the amount of gain reduction is displayed. In ambience mode, the meter continues to show the amount of compression or limiting, but due to the nature of the ambience mode, no longer reads the...
Page 22: Master Controls
Operational Guide 10dB Pad The meter pad reduces the reading of both A and B VU meters when in I/P , O/P or S/C modes. When enabled, meter readings are reduced by 10dB. '0' then represents +14dBu. Master Controls ST Link When enabled, identical gain reduction takes place in both A and B channel paths.
Page 23: Specifications
Specifications Noise - 150R source. Measured with RMS rectifier, 22Hz - 22kHz filter. No lim/comp in circuit -100 dBu Lim and/or comp. in circuit -92 dBu Frequency Response - measured from a 150R source and driving a 10K load. Compressor & limiter in circuit but no gain reduction 20Hz - 20kHz +/-0.2dB <10Hz and >120 kHz...
Page 24: Warranty
Equipment or the defective component should be returned to the Dealer or to Amek and subject to the following conditions, the Dealer or Amek will repair or replace the defective components. Any components replaced will become the property of Amek.