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digital signal processor
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Altec Lansing Pr
Altec Lansing Professional
Altec Lansing Pr
Altec Lansing Pr
Altec Lansing Pr
A division of Altec Lansing Technologies Inc, Milford PA 18337-0277 Made In USA
4048A
ofessional
ofessional
ofessional
ofessional
1000 W. Wilshire Blvd. Suite 362
Oklahoma City, OK 73116 USA
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Table of Contents
Related Manuals for Altec Lansing 4048A SIGNAL PROCESSING
Summary of Contents for Altec Lansing 4048A SIGNAL PROCESSING
- Page 1 Altec Lansing Pr Altec Lansing Professional ofessional ofessional ofessional Altec Lansing Pr Altec Lansing Pr ofessional 1000 W. Wilshire Blvd. Suite 362 Oklahoma City, OK 73116 USA A division of Altec Lansing Technologies Inc, Milford PA 18337-0277 Made In USA...
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Page 2: Table Of Contents
Operating Manual -4048A digital signal processor Table Of Contents 1 1 1 1 1 INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION ..........4 2 2 2 2 2 U N P U N P... - Page 3 Operating Manual-4048A digital signal processor The lightning flash with arrowhead The exclamation point within an symbol, within an equilateral tri- eqilateral triangle is intended to RISK OF ELECTRIC SHOCK angle, is intended to alert the user alert the user to the presence of DO NOT OPEN to the presence of uninsulated important operating and mainte-...
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Page 4: Introduction
3. AC POWER REQUIREMENTS Note: The AC power switch for model 4048A is on the back panel. The Altec Lansing 4048A uses a universal input power supply which will accept any line voltage in the range of 80VAC to 260VAC, 50-60Hz, and is exceptionally resistant to voltage dips, or "brown outs". -
Page 5: A N E L F E At U R E S A N E L F E A A N E L F E A T U R E S T U R E S
The green signal LED indicates -20dB output level. The amber limiter threshold LED depends on settings established within Altec Lansing Software, and, assuming the limiter is active, indicates that sufficient signal level has been reached for the limiter to begin the process of gain reduction. Clipping occurs at +20dB and is indicated by a red LED. -
Page 6: R E A R P R E A R Pa N E L F E A A N E L F E At U R E S A N E L F E A T U R E S T U R E S
Operating Manual -4048A digital signal processor 5. REAR PANEL FEATURES 5.1 Input Connections Balanced input signals are connected to the 4048A using the included "Euro Block" connector. A flat blade screwdriver is required to connect a stripped wire lead to the loose connector, which is then inserted into the rear panel Euroblock receptacle. - Page 7 Operating Manual-4048A digital signal processor 5.3 Contact Closure Connector There are no user controls on the 4048A, making it ideal for permanent installations where security is an issue. There may be times, however, where audio system adjustments must be made in response to real time acoustic changes, such as room size.
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Page 8: A L A Ltec Lansing Maestro Tec Lansing Maestro ™ Softw Softwa R E A R E A R E
Operating Manual -4048A digital signal processor 6. ALTEC LANSING MAESTRO™ SOFTWARE Altec Lansing offers a powerful software interface for the Windows PC environment, providing control for the 4048A digital signal processor. All controls are intuitively represented in a user friendly way, and on-line help is available for key functions. -
Page 9: Getting St Getting Sta Rgetting Sta Rt E D A R A R T E D T E D
7. GETTING STARTED 7.1 Configuration Options Altec Lansing Maestro Software for the 4048A includes 10 permanent default configurations which can be used as starting points for setting up user defined presets. Modified configurations can then be saved to either disk (filename.alp) or one of 18 memory locations on the 4048A. - Page 10 Operating Manual -4048A digital signal processor 7.3 Audio Functions Editing of audio controls is done through the use of scroll bars, numerical entry, various keyboard shortcuts, or by visually dragging filter points in the frequency response window. Ease of use, especially in the frequency response window, makes it possible for fast, potentially destructive mistakes, so plan carefully before making radical gain or filter changes.
- Page 11 Operating Manual-4048A digital signal processor 7.3d EQ Each input and output of the Altec Lansing 4048A processor has its own EQ section offering full parametric EQ, four types of shelving filters, and an all-pass filter. Input channels have eight selectable EQ filters, while output chan- nels have six selectable EQ filters.
- Page 12 Operating Manual -4048A digital signal processor Shelving EQ filters: 1st order filters use a gentle 6dB per octave slope, while 2nd order filters use a 12dB per octave slope for more a pronounced boost or cut. All shelving filters have a boost/cut range of +/-15dB. Low shelving filters have a frequency range from 19.7Hz through 2kHz, and the high shelving filters range from 3.886kHz through 21.9kHz.
- Page 13 Operating Manual-4048A digital signal processor Butterworth Butterworth filters individually are always -3dB at the displayed crossover frequency and are used because they have a "maximally flat" passband and sharpest transition to the stopband. When a Butterworth HPF and LPF of the same crossover frequency are summed, the combined response is always +3dB.
- Page 14 Operating Manual -4048A digital signal processor 7.3g Delay In large installations or outdoor venues there are often many speakers in vari- ous locations to get the best coverage possible. Since sound travels relatively slow through air (1130 ft/s at 20ºC), multiple loudspeaker locations can create a situation where the original audio signal, simultaneously leaving all loudspeakers, arrives at a single point in the venue at several different times.
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Page 15: Other Softw Other Software Functions Other Softw Are Functions
<Print Channel> in the File menu. Since there are no user controls on the 4048A, the only way to load channel presets is by using Altec Lansing Software to recall files saved on either the PC or the 4048A. The exception to this is through the use of contact closures, where presets 1-8 from the 4048A memory can be loaded using switches wired to the rear panel contact closure connector block (see section 5.4). -
Page 16: Troubleshooting Tips
Operating Manual -4048A digital signal processor the remaining seven monitors, providing a consistent starting point for each mix. To copy, first select the input or output to copy from, then click <Edit/Copy>, then click on the input or output to copy to, clicking <Edit/Paste> to complete the action. -
Page 17: 0 S P E C I F I C A S P E C I F I C A S P E C I F I C At I O N S S P E C I F I C A T I O N S T I O N S
Operating Manual-4048A digital signal processor 2.) Use a valid PC serial port. You must use a serial port that is not opened to any other application, such as a mouse, modem, or another program. To verify that the port exists look in: Control Panel - System - Device Manager - Ports. -
Page 18: 1 D I M E N S I O N S D I M E N S I O N S D I M E N S I O N S
The unit you have just purchased is protected by a limited five-year warranty . For warranty service or to obtain a return RMA number, please call Altec Lansing technical services at 405-848-3108. Fill out the information below for your records. -
Page 19: 3 B L O C K D I A G R A M S B L O C K D I A G R A M S B L O C K D I A G R A M S
Operating Manual-4048A digital signal processor 13. BLOCK DIAGRAMS... - Page 20 Altec Lansing Professional ofessional ofessional ofessional Altec Lansing Pr Altec Lansing Pr ofessional 1000 W. Wilshire Blvd. Suite 362 Oklahoma City, OK 73116 USA A division of Altec Lansing Technologies Inc, Milford PA 18337-0277 Made In USA Printed in USA 4048A-0 0503...