BBE DS48 Manuel utilisateur

DIGITAL SPEAKER PROCESSOR

DS48

•User Guide

•Reference Manual

professional products

IMPORTANT SAFEGUARDS

CONTENTS

DS48 Features ……………………………………………………………………iv

1 Introduction ………………………………………………………………………v

2 What is a Speaker Management System? ……………………………………1

2.1 Crossover ……………………………………………………………………1

2.2 Equalization …………………………………………………………………1

2.3 Delay ………………………………………………………………………1

2.4 High Pass and Low Pass Filters …………………………………………1

2.5 Limiting ………………………………………………………………………1

2.6 Signal Distribution……………………………………………………………1

3 Front Panel ………………………………………………………………………2

4 Rear Panel ………………………………………………………………………3

5 Quickstart ………………………………………………………………………4

6 Installation ………………………………………………………………………6

6.1 Rack Mounting ………………………………………………………………6

6.2 Connectors……………………………………………………………………6

7 Operation ………………………………………………………………………7

7.1 Navigating Front Panel Controls …………………………………………7

7.1.1 Hints for Operation ………………………………………………7

7.2 Submenus ……………………………………………………………………8

7.2.1.1 Crossover Submenu ……………………………………………8

7.2.1.2 Load a Xover ……………………………………………………8

7.2.1.3 Design a Xover …………………………………………………8

7.2.1.4 Store a Xover ……………………………………………………8

7.2.1.5 Erase a Xover ……………………………………………………8

7.3 Security Submenu …………………………………………………………8

7.4 Subsystem Submenu ………………………………………………………9

7.5 Interface Submenu …………………………………………………………10

7.6 Parameter……………………………………………………………………10

7.6.1 Gain ………………………………………………………………10

7.6.1.1 Inputs ……………………………………………………………10

7.6.1.2 Outputs …………………………………………………………10

7.6.1.3 Polarity …………………………………………………………11

7.6.1.4 Delay ……………………………………………………………11

7.6.1.5 HPF ………………………………………………………………11

7.6.1.6 LPF ………………………………………………………………11

7.6.1.7 PEQ ………………………………………………………………12

7.6.1.8 Limiter ……………………………………………………………12

7.6.1.9 Name of channel ………………………………………………13

7.6.1.10 Input Signal ……………………………………………………13

7.6.1.11 Copy Output Data ……………………………………………13

7.7 DS48 BLOCK DIAGRAMS ………………………………………………14

8 Graphical User Interface (GUI)…………………………………………………19

8.1 MINIMUM SYSTEM REQUIREMENTS …………………………………19

Jump ahead to

quick start

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8.2 INSTALLING SYSOMAX ON YOUR COMPUTER ………………………19

8.3 STARTING UP SYSOMAX…………………………………………………20

8.3.1 From the Start menu ……………………………………………20

8.3.2 From Windows Explorer or My Computer ……………………20

8.4 Navigating SYSOMAX ……………………………………………………20

8.4.1 Top Line Menu……………………………………………………21

8.5 Device Program Manage/Memory ………………………………………22

8.6 Lock Unit ……………………………………………………………………23

8.7 Help ……………………………………………………………………23

9 Creating a Program………………………………………………………………24

9.1 GAINS ……………………………………………………………………25

9.1.1 Input Signal Selection ……………………………………………25

9.1.2 Output ……………………………………………………………25

9.2 Delays ……………………………………………………………………26

9.3 Limiters ……………………………………………………………………26

9.4 Out 1, Out 2, etc. …………………………………………………………27

9.5 Crossover Filters……………………………………………………………27

9.6 Parametric Equalizers: ……………………………………………………29

10 SPECIFICATIONS ………………………………………………………………30

11 Service ……………………………………………………………………31

12 Warranty ……………………………………………………………………31

13 Maintenance ……………………………………………………………………32

iii

CONTENTS

IMPORTANT! BEFORE YOU BEGIN, PLEASE CHECK THE CONTENTS WITHIN

THIS BOX TO INSURE THESE ITEMS ARE INCLUDED:

1. The BBE DS48 Digital Speaker Processor.

2. The BBE DS48 Digital Speaker Processor User’s Manual.

3. Power cord.

4. Warranty registration card.

5. Software Disc

6. DB-9 type serial cable for connection between unit and PC.

If any of these items are found to be damaged or missing, immediately contact

the BBE dealer you purchased it from. This manual will help you to effectively

utilize the BBE DS48. Reviewing the information contained in this manual will

answer most of the common questions that our service department receives.

If you still have questions, please feel free to call 800-233-8346.

DS48 FEATURES

• 4 inputs 8 outputs and includes 10 configurations

• Choice of Operating and Crossover Modes: 4 X 2-way, 2 X 3-way + 2 Aux,

2 X 4-way, 1 X 5-way + 3 Aux, Mono Dist., Stereo Dist., LCRS w/Mono

Subs, 4 X 4 Processor, Muted/Flat Startup

• Input gain control for each channel

• Separate crossover controller

• 5 band fully parametric equalizer

• Driver Alignment Delay for each output up to 7ms in .1ms increments

• Output gain and phase control

• Three front panel encoders to speed programming

• Security lockout to discourage system tampering

• RS-232 remote control PC interface (Windows compatible software

included)

• Each group parametric equalizer has 360 ISO frequencies with + or -

12dB gain

• Each group Q value is from 0.5 to 128 and provides Hi shelf/Lo shelf

select function.

• Separate limiter with Attack, Hold, Decay and Threshold parameters

• High Pass and Low Pass filter avail for each channel @ 6 or 12dB slope

• Choice of 6dB, 12dB,18dB, 24dB, 48dB Butterworth, Linkwitz-Riley or

Bessel frequency response curve

• Memory for up to 30 on-board user programs

• 8X7 bit input/output precision digital LED meter.

• 2X20 LCD backlit. LED Display

Crossovers

Parametric

Equalizers

Driver

Alignment

Delay

Speaker

Protection

limiter

10 user

memories

INTRODUCTION

Thank you for choosing the BBE DS48 Speaker Management System. This

product will enable you to obtain the best possible performance from your

loudspeaker system. You can also reduce the amount of outboard gear that

is required to transport, set-up and operate as part of the sound system.

The DS48 offers many powerful functions. It is highly recommended that you

read through this manual before you begin connection and operation. For

those that are familiar with this type of device or if you simply can't wait to

hear how good your system will sound, a Quick Start section follows on

pages 4-5.

SOME TERMS THAT WILL BE USED IN THIS MANUAL:

Configuration: This refers to a particular group of settings, with

the primary parameter being the crossover type.

Program: A program is a configuration with either the factory

default or a user-created name.

Configuration and Program may be used interchangeably, though

a configuration must be programmed for a program to exist.

Parameter: A component of a setting such as the center frequen-

cy of one band of parametric EQ or the attack time of a limiter.

WARNING!

To prevent possible speaker or

amplifier damage, always power-up peripheral

devices first, wait 10 seconds, and then turn on the

power amplifier. Turn off power amplifier first, then

power-down peripheral devices.

WHAT IS A SPEAKER MANAGEMENT SYSTEM?

A Speaker Management System uses digital signal processing to accom-

plish multiple functions that affect the audio signal between the mixer and

the power amplifiers. These functions include crossover, equalization,

delay, limiting, high-pass and low-pass filtering as well as signal distribu-

tion. Programs may be created, selected and edited with the DS48's front

panel controls. However, to create new programs, it is best to use the

included free PC software and configure the programs using the graphical

user interface (GUI) and a Windows PC.

2.1 Crossover:

This function uses filters to divide the audio spectrum into multiple bands, such as Highs,

Mids, and Lows. When these separate signals are individually amplified and sent to a

speaker matched for that range, the result is a much more efficient system with more

punch and clarity as compared to system using a two or three-way speaker box with a

passive cross-over. The common terms used for two or three-way systems are "bi-amp"

and "tri-amp".

2.2 Equalization:

This function provides control of the tonal spectrum. It can be used to compensate for dif-

fering acoustic conditions, speaker cabinet responses or boosting/cutting certain frequen-

cy ranges to create a specific type of sound. In some rooms, "ringing" or feedback is

present due to a number of conditions. Use the PEQ function to reduce the ringing fre-

quencies.

2.3 Delay:

This function is used to "time-align" the different transducers in a speaker system. A

properly aligned system will have better phase coherence resulting in more focused

sound.

2.4 High Pass and Low Pass Filters:

These are used to reduce any signal outside of the desired bandwidth and are part of the

equalization function. This frees the power amps and speakers from trying to reproduce

signals that are not an intended part of the mix or simply beyond the reproduction range

of the loudspeakers.

2.5 Limiting:

This function prevents a signal from exceeding a certain pre-determined level. It prevents

input overload with its resultant distortion and also keeps amplifiers from clipping, which

protects the speakers.

2.6 Signal Distribution:

This allows the signals from each of the four inputs to be processed and sent to the cor-

responding output. The crossover function is not active when in this mode. An LCRS (Left,

Center, Right, SUB) mode is also available.

FRONT PANEL

1. LCD Display

The 2x20 backlit LCD displays the program and programming choices of the unit.

2. <BACK/NEXT> Buttons

These buttons allow navigation for selection of sub-menus and some parameter values.

3. Menu

This is one of two buttons that will access the front panel programming. This one is used

primarily to select which program to call up, edit or save.

4. Gain

This is one of two buttons that will access the front panel programming. This, along with

the <Back/Next> buttons accesses the various parameters of a program.

5. Enter

Hitting this button will write the current selection to memory.

6. Quit

This exits the programming menu and returns the display to showing the selected

program.

7. FREQ Encoder Knob

This acts as the main value selector dial for most parameters other than those associat-

ed with EQ, Q and EQ Gain.

8. Q Encoder Knob

This adjusts the Q of a selected equalizer band.

9. GAIN Encoder Knob

This adjusts the Gain levels of Inputs, Outputs and any selected equalizer band.

10. Input Meters

These display the levels of the four inputs. The seven LED lamps per display are in 6 dB

steps from –30dbV to –6dBV, then -3dBV, then Limit (0dBV), then Clip (+8 dBV)

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10 11

FRONT PANEL

1. Power Jack

This accepts a standard IEC type AC bayonet plug. Because the unit uses universal

switching power supply, no voltage selection is required. The ON/OFF power switch is also

located here.

2. RS232 Interface

Connect this to the serial port on a PC using the included cable or other standard DB-9

type cable. With the software installed, the PC can now monitor and program the DS48.

3. XLR Outputs 1-8

These are balanced (Pin 2 Hot) XLR outputs.

4. XLR Inputs A-D

These are balanced (Pin 2 Hot) XLR inputs that accept the signal from the outputs of the

mixer.

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11. Output Meters

These display the levels of the eight output channels. The seven LED lamps per display

are in 6 dB steps from –30dbV to –6dBV, then -3dBV, then Limit (0dBV), then Clip (+8 dBV)

12. Output Mute Buttons

Pressing one of these buttons will mute the respective Output channel and the LED will

illuminate. All outputs will mute automatically during certain program selection and edit-

ing processes, to protect the loudspeakers

REAR PANEL

QUICK START

NOTE: This section will describe navigation of the front panel controls as follows:

The button to press will be shown in ALL CAPITALS. For QUICK START, a number following in

parentheses (#) will also be included. These refer to the same names and numbers as shown

in Figure 1, Front Panel Controls and Indicators. The expected display text is shown in "quo-

tation marks". If you press a button and the display does not change, it means that the but-

ton has no effect for that particular menu item.

If you get to a certain point in the menu and want to go back, but cannot, press QUIT (6) and

begin the steps again. This is normal for the unit.

1. Before hooking up the system, make sure that all items are OFF, especially the power amps.

2. Use high quality balanced XLR mic cables to make the connections. The feeds from the DS48 at "front of

house" can also be sent through the audio snake returns to the amp stacks if used in a live setting.

3. You should know the frequency response and limits of your loudspeakers

4. Connect the main output or outputs of your mixer to the inputs of the DS48.

5. Depending on the configuration you select, connect the appropriate number of outputs from the DS48 to your

power amp inputs.

6. Turn on the DS48.

7. After a brief start up, the display will show "2 x 2 WAY X-OVER"

8. Press MENU (3).

Press ENTER (5).

Press NEXT (2) "Design a Xover"

9. Press ENTER (5).

Select the crossover mode desired with the BACK/NEXT (2) buttons. After selection, Press ENTER (5).

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