Logic Digital DP2140 User manual

Logic Digital Crossover
logic system
DP2140-2160 User Guide
R3-(08/03/2010)

Logic Digital Controller
User Guide version 3 Page 2 of 31
Quick Reference Guide
Display
The LCD displays preset and parameter information. The default screen is shown after start up and
displays the number and name of the current preset on the lower line of text. When navigating around
the adjustable parameters, other information is shown.
Channel Select Buttons
The currently selected input or output channel is shown in the top left corner of the display. Pressing the
channel select buttons scrolls through the available inputs and outputs. If operating stereo linked the
channel pair is shown. For example ‘CH A+B’ means both input A and B parameters.
Edit Select Buttons
The name of the edit parameter page is displayed in the bottom left portion of the LCD. Pressing the edit
select buttons moves through the available parameter pages for the current input or output.
Parameter Knobs
Up to three parameters are shown on the display. The parameter name is shown with its’ current value
below. Where appropriate, parameters are grouped according to function. For example the parametric
equalisation page shows centre frequency, width and gain. Turning a parameter knob clockwise will
increase the value of a parameter, turning anti-clockwise will decrease it. Turning a knob rapidly will
cause the action to ‘accelerate’, so the value changes more rapidly.
Mute Buttons
The LEDs next to the mute buttons indicate their current status. Pressing a mute button toggles between
the mute on and off.
Store Button
The unit has 45 preset locations. To store a preset in a location, press the store button and use the
parameter knobs to select the preset location and name the preset. Pressing the store button again
completes the task. Pressing any button other than store during the process cancels the procedure.
Recall Button
To recall a preset, press the recall button and use parameter knob A to select the required preset.
Pressing the recall button again will activate the preset. You will then be asked to confirm by pressing
recall once more. As with the store function, pressing any button other will cancel the process.

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User Guide version 3 Page 3 of 31
Quick Reference Guide .......................................................................................................................2
Display.......................................................................................................................................2
Channel Select Buttons................................................................................................................2
Edit Select Buttons......................................................................................................................2
Parameter Knobs ........................................................................................................................2
Mute Buttons..............................................................................................................................2
Store Button...............................................................................................................................2
Recall Button ..............................................................................................................................2
Important Safety Information..............................................................................................................5
Regulatory Compliance................................................................................................................5
Thanks and Unpacking .......................................................................................................................6
Introduction and Key Features ............................................................................................................7
Introduction................................................................................................................................7
The User Guide..................................................................................................................................8
Front Panel........................................................................................................................................9
Input Signal Indicators................................................................................................................9
Preset Store and Recall ...............................................................................................................9
Channel Select Buttons................................................................................................................9
Edit Select Buttons....................................................................................................................10
Text Display..............................................................................................................................10
Parameter Knobs ......................................................................................................................10
Output Signal / Limiter Indication...............................................................................................10
Mute Buttons and Status LEDs...................................................................................................10
Secure Button (on the rear).......................................................................................................11
Rear Panel.......................................................................................................................................11
Power Inlet...............................................................................................................................11
Network Expansion Port ............................................................................................................11
Audio Input Connectors.............................................................................................................11
Audio Output Connectors...........................................................................................................12
Communications Port Connector ................................................................................................12
Operation ........................................................................................................................................13
Starting up ...............................................................................................................................13
Selecting a Factory Preset .........................................................................................................13
Creating a Crossover.................................................................................................................13
Navigation and Viewing Parameters ...........................................................................................14
Navigation................................................................................................................................14
Presets.....................................................................................................................................15
Preset Recall.............................................................................................................................15
Preset Store..............................................................................................................................16
DSP Processing layout ......................................................................................................................18
Input DSP block diagram...........................................................................................................18
Output DSP block diagram.........................................................................................................18

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User Guide version 3 Page 4 of 31
Stereo / Mono Formats..............................................................................................................18
DSP processing.........................................................................................................................19
Input Channels .........................................................................................................................19
Output Channels.......................................................................................................................21
Utilities............................................................................................................................................25
Factory Preset s ................................................................................................................................26
EQ and Filter Response Graphs .........................................................................................................27
Technical Specification......................................................................................................................30
General ....................................................................................................................................30
Processing................................................................................................................................30
Connectors...............................................................................................................................30

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User Guide version 3 Page 5 of 31
Important Safety Information
Please read carefully and keep the following instructions and safety information. Heed all
warnings and follow all instructions.
•Do not remove covers. There are no user serviceable parts inside, please refer
servicing to qualified service personnel.
•This equipment must be earthed.
•Protect the power cord from being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
•Only use attachments/accessories specified by the manufacturer.
•Servicing is required when the apparatus has been damaged in any way, such as the
power supply cord or plug is damaged, liquid has been spilled or objects have fallen into
the apparatus, the apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
Regulatory Compliance
This product complies with both the EMC Directive (89/336/EEC) and the Low Voltage Directive
(73/23/EEC) as issued by the Commission of the European Community.
Compliance with these directives implies conformity with the following European standards:
•EN60065 Product safety
•EN55103-1 Electromagnetic Interference (Emission)
•EN55103-2 Electromagnetic Susceptibility (Immunity)
This product is intended for operation in the E2 (commercial & light industrial) and E3 (urban
outdoors) Electromagnetic Environments.

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User Guide version 3 Page 6 of 31
Thanks and Unpacking
Thank you for choosing a Logic System Digital series loudspeaker management system for your
application. Please spare a little time to study the contents of this manual, so that you obtain
the best possible performance from this unit.
All Logic System products are carefully engineered for world-class performance and reliability. If
you would like further information about this or any other Logic System product, please contact
us. We look forward to helping you in the near future.
Unpacking the LOGIC SYSTEM Digital series processor
After unpacking the unit please check carefully for damage. If damage is found, please notify
the carrier concerned at once. You, the consignee, must instigate any claim. Please retain all
packaging in case of future re-shipment.

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Introduction and Key Features
Introduction
The LOGIC SYSTEM Digital series of loudspeaker management systems represent the current
state-of-the-art. Taking advantages of the latest advances in analogue to digital conversion and
digital signal processing technologies the units achieve performance levels that have only
recently been made possible.
Key Features
•Linea Research minimal signal path design
•Sonically superb ADC / DAC combination; a carefully matched pairing of the best devices
from Burr Brown and Wolfson
•Newly released family of Analogue Devices SHARC DSP
•Extended bandwidth; 96 kHz sampling frequency provides for a nominally flat response to
40 kHz.
•Parameter knob and LCD provide a rapid, user-friendly control interface
•Networking capability to control multiple units via the Bv Net protocol.
•Remote control of all functions via the ‘Podware’ software package.
Note
This manual is generic to 2 in 4 out and 2 in 6 out versions of the DP controller.

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User Guide version 3 Page 8 of 31
The User Guide
This user manual gives a progressively more detailed description of the functions of the LOGIC
SYSTEM Digital series loudspeaker management systems. A single page quick reference guide is
provided for those users who are experienced with this type of equipment and just need to
know how to ‘drive’ the front panel.
A detailed explanation of the front and rear panel controls and indicators is contained in the
next section. The final section describes each individual function or feature with annotated
images explaining its’ use. Where appropriate, the LCD is shown to further elaborate on the
units’ operation.
To complete the manual a reference section is included, describing the technical performance of
the device complete with graphs of filter responses and details of the Factory Preset s and their
configuration.

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User Guide version 3 Page 9 of 31
Front Panel
2x 24 character
LCD
Input Signal
Indicators
Store and
Recall buttons
Channel Select
buttons
Parameter Edit
Encoders
Output Mute
buttons
Limiter
Indicators
Edit Parameter
Select buttons
Input Signal Indicators
A set of three pairs of LEDs indicate signal present, +4dBu and input clip for each channel. The
signal present LEDs operate at approximately –40 dBu, giving a useful indication of even
relatively low input signal levels. The +4 dBu LEDs are intended to show nominal operating level
and can also be useful for setting system gain structure. Clip LEDs warn the user of input
overload and operate at +19 dBu.
Preset Store and Recall
These controls provide access to the 45 presets stored within the device. Pressing the store
button allows the user to name a preset and choose which memory location it will be held in.
Pressing store button again completes the process. The Recall function operates in a similar
way, pressing the recall button allows the user to select which preset they require, pressing the
button for a second time, then confirming, recalls the new DSP settings.
Note that presets cannot be stored or recalled when secure mode is activated.
Channel Select Buttons
The currently selected channel is displayed on the top left hand corner of the LCD. Pressing the
channel buttons scrolls through the available input and output channels and finally through the
utility functions and back to the default screen. If operating a stereo linked preset, the channel

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User Guide version 3 Page 10 of 31
name will indicate the channel pairing. For example ‘A+B’ means both input A and B
parameters. The name of the output will be shown briefly at the top of the display when
stepping onto an output.
Edit Select Buttons
The currently selected edit parameter page is displayed on the bottom left corner of the LCD.
Pressing the edit select buttons moves through the available parameters for the current input or
output.
Text Display
Preset, channel, parameter and status information is shown on the 2x 24-character text display.
In most screens the currently selected channel is displayed on the upper line and the edit
parameter on the lower line. To simplify the display and enhance security, some parameters or
parameter pages are omitted when not relevant.
Parameter Knobs
Three velocity sensitive parameter knobs are used to adjust parameters shown on the display.
Up to three parameters at a time are displayed on the screen. The parameter name is shown
above the parameter value in each of the three screen sections. The parameter knobs have a
fixed association with the screen sections; the rightmost parameter knob adjusts the rightmost
parameter and so on.
Output Signal / Limiter Indication
Two LEDs are provided for each output channel. These show the signal level relative to the
limiter threshold. The yellow LED will light when the signal is 6dB below the threshold and the
red warning LED will light when the limiter threshold is reached.
Mute Buttons and Status LEDs
Each output has a mute button and associated mute status LED. Pressing the button toggles the
mute on and off.
Note that the mute buttons do not function when the secure mode is activated.