Nilfisk-ALTOメーカーBK 2.0の使用説明書/サービス説明書
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BK 2.0 User's Manual LTO R R www .altoproaudio.com Version 2.0 Dec. 2002 English English COMPRESSOR /LIMITER /GA TE.
1 SAFETY RELATED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Protective Grounding Make sure to connect the protective grounding to prevent any electric shock before turning ON the apparatus. Never cut off the internal or external protective grounding wire or disconnect the wiring of protective grounding terminal.
2 PREFACE Dear Customer: For our LTO AUDIO TEAM, music and sound are more then a job...are first of all passion and let us say...our obsession! We have been designing professional audio products for a long time in cooperation with some of the major brands in the world in the audio field.
3 TABLE OF CONTENTS 1. INTRODUCTION........................................................................................................................................4 2.1 Some technical stuff 2. THE CONCEPT BEHIND................................
1. INTRODUCTION Y ou are now the owner of an L TO BK 2.0 Compressor/Limiter/Gate. The B K 2.0 is a very powerful dynamic processor. We have included in it several innovative circuit designs that make t he BK 2.
5 2.1.2 Introducing Audio Dynamics The human ear can detect the noise generating by falling leaves as well as the roar generated by the taking off space shuttle. Unfortunately no analog, nor digital device can reproduce such wide spectrum. Please lo ok at Chart.
6 2.1.4 More about noise: Expanders and Noise-Gates A lo t of instruments such as microphones, amplifiers, guitar pickups, etc generate some noise, either at low frequ- encies (hum) or at high frequencies (hiss) Such noise will inevitably interfere with the quality of your audio signal.
7 2.Close LED This LED illuminates when expansion occurs. 4 5 6 8 7 9 3.
8 11. PROCESS control This control renews any high frequencies lost through the compression process for natural sounding dynamics control, which can be varied from off to 6. Please note that the enhancer control is only used when compression is taking place.
9 4. READY TO ROLL? 4.1 Expander/Gate Section Chart.3: Function of an expander As we told you previously in this Manual the downward expander will reduce automatically the level of the audio signal when such signal is below a set threshold. So the expander is t he opposite of the compressor/limiter .
10 4.2.2 Ratio control This control sets the ch ange of input level to o utput level but only fo r the signals that exceed the threshold. The scale of the ratio control on th e front panel (calibrated in dB) indicates how much inpu t level is required to incr ease the output level by 1 dB.
11 5. INSTALLATION AND CONNECTION 5.1 Mains Connection BK 2.0 is provided w ith dual voltage plug. You must check the power supply Vol tage available in your Country before connecting the power c ord in the wall outlet. Please see Page, p aragraph 12 for further info.
12 a. Wiring Configuration Both types of connectors available on BK 2.0 can be wired in balanced and unbalanced modes. Please see following drawing for details: For 1/4" TRS jack For XLR connector 1/4"TRS jack Unbalanced input XLR Unbalanced input XLR Balanced input 1/4"TRS jack Balanced input b.
13 1/4" TRS insert Tip Ring Sleeve Tip (S.
14 AUDIO INPUT AUDIO OUTPUT COMPRESSOR SECTION GATE SECTION DYNAMIC ENHANCER SECTION FUNCTION SWITCHES INDICATORS POWER SUPPL Y DIMENSIONS WEIGHT 6. TECHNICAL SPECIFICA TIONS Active balanced XLR and 1/4"JACK 60k ohm balanced +21 dBu balanced and unbalanced +21 dBu XLR and 1/4" JACK < 40k ohm unbalanced 20Hz to 20KHz at +0,- 1dB 0.
15 7. BLOCK DIAGRAM Chart.8: Block diagram of the BK 2.0.
8. WARRANTY 1. WARRANTY REGISTRA TION CARD T o obtain Warranty Service, the buyer should first fill o ut and return the enclosed Warranty Registration Card within 10 days of the Purchase Date.
SEKAKU ELECTRON IND. CO., LTD NO.1, LANE 17, SEC. 2, HAN SHI WEST ROAD, T AICHUNG, 401 TAIW AN http://www.altoproaudio.com T el:886-4-22313737 email: alto@altoproaudio.com Fax:886-4-22346757 All rights reserved to AL TO. All features and content might be changed without prior notice.
デバイスNilfisk-ALTO BK 2.0の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Nilfisk-ALTO BK 2.0をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはNilfisk-ALTO BK 2.0の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Nilfisk-ALTO BK 2.0の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Nilfisk-ALTO BK 2.0で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Nilfisk-ALTO BK 2.0を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はNilfisk-ALTO BK 2.0の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Nilfisk-ALTO BK 2.0に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちNilfisk-ALTO BK 2.0デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
