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23
AUTOCOM PRO MDX1400
Ear
Microphone Amplifier
Power Amplifier
Tape Recorder
Radio
Cassette
Recorder
P/dB
140
120
100
80
60
40
Fig. 6.1: The dynamic range capabilities of various devices
It is therefore useful to keep the operating level as high as possible without risking signal distortion in order to
achieve optimum transmission quality.
It is possible to further improve the transmission quality by constantly monitoring the program material with the
aid of a volume fader, which manually levels the material. During low passages the gain is increased, during
loud passages the gain is reduced. Of course it is fairly obvious that this kind of manual control is rather
restrictive; it is difficult to detect signal peaks and it is almost impossible to level them out. Manual control is
simply not fast enough to be satisfactory.
t
P/dB
+20
0
-20
-40
-60
-80
Clipping
Headroom
Operating level
Effective SNR
Noise floor
Fig. 6.2: The interactive relationship between the operating level and the headroom
The need therefore arises for a fast acting automatic gain control system which will constantly monitor the
signals and which will always adjust the gain to maximize the signal-to-noise ratio without incurring signal
distortion. This device is called a compressor or limiter. This system is a part of the BEHRINGER AUTOCOM PRO.
6.3 Compressors/Limiters
By measuring the dynamic range of musical instruments in live recording situations, you will find that extreme
amplitudes occur which often lead to overload in subsequent signal processing equipment. Especially in
broadcasting and record cutting techniques, these signal peaks can lead to heavy distortion. To avoid this kind
6. TECHNICAL BACKGROUND
- PRO MDX1400 1
- SAFETY INSTRUCTIONS 2
- FOREWORD 3
- TABLE OF CONTENT 5
- 1. INTRODUCTION 6
- 1.2 Before you begin 7
- 2. CONTROLS 8
- 13108976155 9
- 20 19 23 10
- 3. APPLICATIONS 11
- 3.2 Expander/Gate Section 12
- Control Setting 13
- THRESHOLD control OFF 13
- RELEASE switch SLOW 13
- 3.3 Compressor Section 14
- 3.4 Dynamic Enhancer Section 16
- 4. SPECIAL APPLICATIONS 17
- 5.1 The Sidechain Function 20
- 5.3 Anticipated Compression 21
- 6. TECHNICAL BACKGROUND 22
- 7. AUDIO CONNECTIONS 24
- 8. TECHNICAL DATA 26
- 9. WARRANTY 28
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(7 strony)Nsi-industries EWZ120 manuales
Manuales del propietario y guías del usuario para Equipo Nsi-industries EWZ120.
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