Dbx 160SL User Manual download pdf (Page 6)

160S

lue seriesb

160S

controls controls

160S

notes notes

160S

Operations

160S

Operations

Inspection Inspection

Operating Operating

Connection

Installation

Technical

Introduction Introduction

to your system

considerations

contents

concept

diagram

applications

support and factory service

160S

Specifications

160S

Manual

Design

Block

Controls

Advanced

Warranty

lue seriesb

Operating Level

Headroom

Clipping

Noise Floor

Useable dynamic range

Clipped signal heavily distorted

Audio levels below here are not heard, because of noise

+10

-10

-20

time

+10

-10

-20

time

input

dBu

Figure 2 Figure 1

Figure 3 Figure 4

input

dBu

+10

-10

-20

time

+10

-10

-20

time

output

dBu

output

dBu

INPUT OUTPUT INPUT OUTPUT

CHANNEL ONECHANNEL TWO

Jensen®

Output

Transformer

Jensen

Output

Transformer

10k 1W

GND

Switch

GND

Switch

BALANCED FLOATING OPERATION UNBALANCED FLOATING OPERATION

Chassis

Ground

Chassis

Ground

Chassis

Ground

Ground Switch open

Unbalance Switch open

Ground Switch open

Unbalanced Switch closed

(6dB drop in output level)

Jensen®

Output

Transformer

Jensen

Output

Transformer

10k 1W

GND

Switch

GND

Switch

BALANCED GROUND-

REFERENCED OPERATION

UNBALANCED GROUND-

REFERENCED OPERATION

Chassis

Ground

Chassis

Ground

Ground Switch closed

Unbalance Switch open

Ground Switch closed

Unbalance Switch closed

(6dB drop in output level)

Source

Device

(mixer)

OUT

Audio

Outputs

Source

Device

(mixer)

Audio

Outputs

DELAY

Audio

Inputs

Audio

Outputs

Sidechain

Return

Sidechain

Send

Audio

Inputs

Audio

Outputs

Sidechain

Return

Sidechain

Send

Chassis

Ground

Chassis

Ground

Chassis

Ground

160SL

UL60065

FUSE:

T 500mA L

250V

Dynamic

Range

The Difference Between Compressors and Limiters

By measuring the dynamic range of musical instruments in live recording situations, you will experience

extreme amplitudes which will often lead to overload in subsequent signal processing equipment. Especially in

broadcasting and digital recording, these signal peaks can lead to heavy distortion. To avoid this kind of distortion

or, to avoid loudspeakers being damaged by overload, compressors and limiters are used.

The principle function of these devices is automatic gain control, as mentioned in the previous paragraphs, which

reduces the amplitude of loud passages and therefore restricts the original signal dynamics within a desired range.

This is useful, especially in conjunction with microphone recording techniques, to compensate for level changes

which are caused by inconsistent microphone techniques on the part of the player, or to restrict the natural

dynamic range of voices or instruments to achieve a more even level.

Although compressors and limiters perform similar tasks, one essential point makes them different:

Limiters abruptly limit the signal above a certain level, while compressors control the signal “gently” over a wide

range. A limiter continuously monitors the signal and intervenes as soon as an adjustable level is exceeded. This

level is called the “threshold”. Any signal exceeding this threshold level will be immediately held below the set

threshold level.

A compressor also monitors the program material continuously and also has a set threshold level. However,

in contrast to the limiter, signals exceeding the threshold are not reduced abruptly, but gradually. Above the

threshold the signal is reduced in level relative to the amount the signal exceeds this point.

Generally, threshold levels for compressors are set below the normal operating level to allow for the upper

dynamics to be musically compressed. For limiters, the threshold point is set above the normal operating level in

order to provide peak signal limiting and thus protects subsequent equipment.

160SL

lue seriesb

160SL

controls controls

160SL

notes notes

160SL

Operations

160SL

Operations

Inspection Inspection

Operating Operating

Connection

Installation

Technical

Introduction

to your system

considerations

contents

concept

diagram

applications

support and factory service

160SL

Specifications

160SL

Manual

Design

Block

Controls

Advanced

Warranty

lue seriesb

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Dbx 160SL User Manual Page 6

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