Summary of Contents for Logic Digital DP2140
- Page 1 Logic Digital Crossover logic system D P 2 1 4 0 - 2 1 6 0 U s e r G u i d e R 3 - ( 0 8 / 0 3 / 2 0 1 0 )
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Page 2: Quick Reference Guide
Logic Digital Controller 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. -
Page 3: Table Of Contents
Logic Digital Controller 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... - Page 4 Logic Digital Controller Stereo / Mono Formats......................18 DSP processing .........................19 Input Channels .........................19 Output Channels ........................21 Utilities ............................25 Factory Preset ..........................26 EQ and Filter Response Graphs ......................27 Technical Specification........................30 General ............................30 Processing ..........................30 Connectors ..........................30 User Guide version 3 Page 4 of 31...
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Page 5: Important Safety Information
Logic Digital Controller 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. -
Page 6: Thanks And Unpacking
Logic Digital Controller 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. -
Page 7: Introduction And Key Features
Logic Digital Controller 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. -
Page 8: The User Guide
Logic Digital Controller 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’... -
Page 9: Front Panel
Logic Digital Controller Front Panel Channel Select buttons 2x 24 character Limiter Indicators Store and Recall buttons Input Signal Indicators Parameter Edit Encoders Edit Parameter Output Mute Select buttons 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... -
Page 10: Edit Select Buttons
Logic Digital Controller 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. -
Page 11: Secure Button (On The Rear)
Logic Digital Controller Secure Button (on the rear) A momentary button is fitted behind the rear panel, between the output XLRs and the RS232 port. When activated, this will disable all the front panel controls so they cannot affect the signal path, making the unit secure against tampering. -
Page 12: Audio Output Connectors
Logic Digital Controller Audio Output Connectors The processed outputs are impedance balanced, and wired pin-1 ground, pin-2 hot and pin-3 cold. An unbalanced input may be driven by connecting pin-3 ‘cold’ signal to the ground connection of the unbalanced destination input. Note that output pin-1’s are ground lifted at audio frequencies but connected to ground at RF for good EMC performance. -
Page 13: Operation
Logic Digital Controller Operation Starting up The unit will energise as soon as power is applied to the IEC inlet; there is no power switch. During the start up process the firmware application model number and version numbers are displayed and the outputs are muted until the unit has completed its internal checks. Once the start-up routines are complete and the unit is ready to pass audio. -
Page 14: Navigation And Viewing Parameters
Logic Digital Controller Preset described above. These presets are also locked but the user can name and store their own edited versions in any free preset location. Navigation and Viewing Parameters Many of the processing elements in each input and output path have features that may be controlled by the user, such as gain, frequency or limiter threshold. -
Page 15: Presets
Logic Digital Controller CHANNEL Out1 Freq Width Gain 100Hz 1.4Q 0.0dB EDIT Pressing the edit navigation buttons gives access to the various pages of parameters available for each channel. The currently selected page is shown in the bottom left hand corner of the display;... -
Page 16: Preset Store
Logic Digital Controller indicated by a box symbol appearing after the preset number. Press the Recall Button again to activate the Preset. Pressing any other button will cancel the operation. Preset Name Recall 32 My System SELECT PRESET TO RECALL... - Page 17 Logic Digital Controller The user can overwrite non-protected Presets only; if an attempt is made to save a Preset in a location already occupied by a basic or Factory Preset a ‘LOCKED PRESET’ message is displayed. User Guide version 3...
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Page 18: Dsp Processing Layout
Logic Digital Controller DSP processing layout Input DSP block diagram Input Input Order Six Band High Input A Delay LED’s Gain Shelf EQ Shelf EQ Routing - 6dB NB. Channel B processing is identical to Channel A but for Input B... -
Page 19: Dsp Processing
Logic Digital Controller DSP processing Input Channels Gain In A Gain 0.0dB • Knob A: Gain, adjustable in 0.2dB steps from –80 dB to +20dB Delay In A Delay 1.50ms • Knob A: Delay, adjustable in variable steps from 0 to 400ms The delay parameter is adjustable in fine steps at low values;... - Page 20 Logic Digital Controller High Pass Filter In A Freq Shape 20.0Hz LR24 • Knob A: Frequency, out (off), 10.0Hz to 25.6kHz in variable steps • Knob B: high pass filter type System high pass filtering is provided for the input signal. This is the preferred location for high pass filtering as it affects all outputs and can therefore improve inter-band phase relationships.
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Page 21: Output Channels
Logic Digital Controller • Knob B: Slope, 6 to 12dB / octave in 1dB steps • Knob C: Gain, +/-15dB in 0.2dB steps The frequency is specified as point where the filter deviates by 3dB from the gain value. Parametric filters... - Page 22 Logic Digital Controller Delay Out1 Delay 1.50ms • Knob A: Adjustable in variable steps from 0 to 80ms As for input delay, velocity sensitive Parameter Knobs provide finer adjustment at low levels and rapid selection of higher values. High and Low Pass Filters...
- Page 23 Logic Digital Controller Parametric Equalisation Eight sections of equalisation are provided in a similar format to the input channel equalisation; two shelving filters and six parametric. Out1 Freq Slope Gain EQ>- 100Hz 12dB 0.0dB • Knob A: Frequency, 10.0Hz to 25.6kHz in variable steps •...
- Page 24 Logic Digital Controller Limiters Out1 Thresh 4.0dB • Knob A: Threshold, -40dBu to 20dBu in 0.2dB steps A high performance, low distortion limiter is provided on each output. Threshold is user adjustable; all other parameters are carefully calculated dependant on configuration to provide clean and effective control of signal dynamics.
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Page 25: Utilities
Logic Digital Controller Utilities Utility functions Three utility functions are provided to adjust screen contrast, the display units used for parametric equalisation bandwidth and switch between stereo and mono mode. The device automatically adjusts for the variations in display contrast as the temperature of the LCD changes. -
Page 26: Factory Preset S
Logic Digital Controller Factory Preset location preset name out1 out2 out3 out4 out5 out6 Basic default programs basic stereo < 100 100 ~ 1K 1K > < 100 100 ~ 1K 1K > basic mono full range full range full range... -
Page 27: Eq And Filter Response Graphs
Logic Digital Controller EQ and Filter Response Graphs Butterworth 1 . 10 1 . 10 Frequency, Hz 6dB/Oct 12dB/Oct 18dB/Oct 24dB/Oct 48dB/Oct Linkwitz-Riley 1 . 10 1 . 10 Frequency, Hz 12dB/Oct 24dB/Oct 48dB/Oct User Guide version 3 Page 27 of 31... - Page 28 Logic Digital Controller Bessel 1 . 10 1 . 10 Frequency, Hz 12dB/Oct 24dB/Oct Hardman 1 . 10 1 . 10 Frequency, Hz 4th Order 8th Order User Guide version 3 Page 28 of 31...
- Page 29 Logic Digital Controller Shelving EQ 1 . 10 1 . 10 Frequency, Hz Low shelf, varying Gain High shelf, varying Slope Parametric EQ 1 . 10 1 . 10 Frequency, Hz Varying Gain Varying Bandwidth User Guide version 3 Page 29 of 31...
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Page 30: Technical Specification
Logic Digital Controller Technical Specification General Inputs……………………………………………….. Input Impedance………………………………… > 10k Ohm Electronically balanced Maximum Input level…………………….…… +20dBu Outputs…………………………………………….. four [LOGIC 24] or six [LOGIC 26] Output Impedance……………………………… <100 Ohm, ground balanced Maximum Output Level……………………… +202dBu into 600ohm load Sample Rate………………………..…………….. - Page 31 Logic Digital Controller Logic System Pro Audio Ltd. Units 5 & 6 Sandars Road, Heapham Road industrial Estate, Gainsborough, Lincolnshire, DN21 1XT. T: +44(0)1427 611791 F: +44(0)1427 677008 sales@logic-system.co.uk W: www.logic-system.co.uk User Guide version 3 Page 31 of 31...
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