Lexicon CP-3 Owner's Manual
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Lexicon CP-3 Owner's Manual

Digital surround processor
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  • Page 1 Owner's Manual CP-3 Digital Surround Processor...
  • Page 2 Unpacking and Inspection After unpacking the CP-3, save all packing materials in case you ever need to ship the unit. Thoroughly inspect the CP-3 and packing materials for signs of damage. Remove the adhesive protective film from the CP-3 front- panel lens.

  • Page 3: Safety Suggestions

    Read Instructions Read all safety and operating instruc- tions before operating the unit. Retain Instructions Keep the safety and operating instruc- tions for future reference. Heed Warnings Adhere to all warnings on the unit and in the operating instructions. Follow Instructions Follow operating and use instructions. Heat Keep the unit away from heat sources such as radia- tors, heat registers, stoves, etc., including amplifiers which produce heat.
  • Page 4 CP-3 Digital Surround Processor Owner's Manual...

  • Page 5: Table Of Contents

    Connection Location Cosiderations • AC Connections Wiring Considerations • Audio/Video Connections • Connecting the CP-3 as a preamp • Connecting the CP-3 in a tape monitor loop • Video Connections Calibration LCD Adjustment • The Video On-Screen Display • The Setup Menu Setting the Speaker Configuration •...

  • Page 6: Introduction To The

    For music the CP-3 uses true stereo digital processing to recreate the original recording space or to create a new one of your choosing.

  • Page 7: Introduction

    Lexicon invented the technology that permits the most accurate reproduction of film sound in the same system that is used for music listening, and the software-based CP-3 is optimized for each of these unique tasks. The Music Surround mode is specifically designed to opti- mally play conventional stereo music through any system which includes side or side-located rear speakers.

  • Page 8: Using The Documentation

    Whether you are performing the installation, or simply using the system, we hope that you will read the Theory and Design booklet. Understanding the goals of CP-3 design will make sense of each step in the setup procedure, and will help you make the most of the operating features.

  • Page 9: System Overview

    To understand the overall organization of the unit, it is helpful to define those few terms which are unique to the CP-3. Mode A mode is a configuration that determines how the CP-3 will process an input signal.
  • Page 10 CP-3 CP-3 Digital Surround Processor Essentially, the CP-3 can be thought of as a line level preamp with one audio-only and three audio/video inputs. It behaves as the master proces- sor for your system, controlling system volume, balance, source selections and acoustical environments.

  • Page 11: Installation And Calibration

    MUTE LED on the front panel, and displays “EF- FECTS MUTED.” This by- passes all signal processing in the CP-3 except level con- trol, and is the simplest way to play “normal” two-speaker stereo. Pressing again will restore normal operation.
  • Page 12 Indicators The Rear Panel CAUTION: Never make or break any connections to the CP-3 with the rear-panel power ON. Make sure any associated amplifiers have been turned off for at least one minute before turning this master power switch on or off.

  • Page 13: Remote

    This allows you to hear the effect the CP-3 is adding without the main channels on. Operation depends on the mode in use and is explained in the manual section for each mode.
  • Page 14 The CP-3 uses this button’s sig- nal to differentiate between the remotes. Therefore it is impor- tant that the CP-3 be turned on with the remote control that will be used during each listening session. To use the other re-...
  • Page 15 MUTE alternately turns off ing BANK again switches to and on all signals added by USER B9, and pressing the CP-3. Use it to compare BANK once more selects the sound with and without Preset 9. CP-3 processing, or as a simple way to play normal 6.

  • Page 16: Connection

    The CP-3 has a master power switch on the rear panel above the IEC standard AC power receptacle. This switch may be left ON continuously when the unit is in regular use. When the CP-3 will not be used for an extended period of time, or whenever you are connecting or disconnecting any cables to the unit, this switch should be turned OFF.

  • Page 17: Wiring Considerations • Audio/Video

    There is controversy over the audible effects of different types of intercon- nects. Good engineering practices have minimized the effect that cables might have on the inputs and outputs of the CP-3 — but feel free to evaluate different interconnects in your system. If you want to do some tweaking, be...
  • Page 18 CP-3 into the system, but they basically fall into two categories: those where the CP-3 is connected directly to all of the amplifiers in the room, and those where the CP-3 is connected into a tape or signal processor loop of a preamp or receiver.
  • Page 19 In this configuration, use a Y-connector to hook the VCR to Video 1 as well if its tuner is used instead of the TV tuner. ** In this configuration, select the TV's video input to see the CP-3's on-screen display. Connection...
  • Page 20 In this configuration, use a Y-connector to hook the VCR to Video 1 as well if its tuner is used instead of the TV tuner. ** In this configuration, select the TV's video input to see the CP-3's on-screen display. Lexicon...
  • Page 21 CP-3 rear panel is turned off, or if power is removed from the CP-3, the unit will default to Input 1 for audio and video, and will continue to pass that signal through to the output.

  • Page 22: Calibration

    When turning on the CP-3 for the first time, perform the Restore Defaults routine described in Chapter 4 of this manual. Depending on the location of the CP-3 in your room, you may need to adjust the front panel Liquid Crystal Display (LCD) for optimum viewing.
  • Page 23 Since the On-Screen Display is capable of showing the full menu of options available at any point, calibration of the system is faster and easier if the CP-3 video output is connected to a video input on a television monitor.
  • Page 24 Calibration Lexicon The Setup Menu Press SETUP to display the Setup menu. PARAM will step the cursor through the Setup menu selections. Once an item is selected, pressing PARAM will display a sub-menu for that item. With the sub-menu displayed, PARAM once again selects menu items. PARAM adjust the settings of the selected item over its available range.

  • Page 25: Setting The Speaker Configuration • Setting

    If you are using only a single rear speaker, or multiple speakers with a single amp channel (mono), select ONE. This speaker should be connected to the left rear output on the CP-3 rear panel. Select TWO if you are using two or more rear speakers.
  • Page 26 Calibration Lexicon Setting There are four inputs on the CP-3. Inputs 1, 2 and 3 switch audio and video; Input 4 switches audio only and outputs the video signal from Video Input Input Levels 1. Each input can be assigned an individual gain level to compensate for sources with different output levels.
  • Page 27 -18dB to +12dB. Your setting is displayed(in dB) as the MAN (manual) setting. The AUTO setting shows the optimum input level as determined by the CP-3. If the manual level is set too high, causing input overload, the input level will automatically decrease to the point at which it is no longer causing overload.
  • Page 28 Music Surround mode. Any of the preset modes or any of the CP-3's 30 User Registers can be selected — or the current mode can remain unchanged. You can, of course, change the operating mode you are listening to, but if AUTO MODE LOAD is ON, pressing the same input button again will reload the assigned operating mode.
  • Page 29 CP-3 Digital Surround Processor When CP-3 Input and Output levels are set properly, the entire system will be calibrated to play films at the level intended by the director. Setting the output levels is easy, particularly if a Sound Pressure Level (SPL) meter is used.
  • Page 30 In the absence of an SPL meter, it is possible to set the output level by ear. Use the built-in signal generator in the CP-3 to adjust all volumes to be the same as they cycle around the various speakers. Depending on timbre variations between your speakers, this may be difficult to judge, get as close as you can.

  • Page 31: Calibrating The Listener Position • Setting

    Find a mono source, such as an announcer on FM radio or a mono film, and listen for a tightly focused center image of speech or singing. If the image is off-center, adjust the CP-3’s BALANCE controls. (The more centered the monaural image, the better Panorama will work.) CALIBRATE NOISE is a special digitally generated signal to aid in calibrat- ing the Panorama mode.
  • Page 32 The Panorama mode is now calibrated. Press the SETUP button to store these settings and return to the main setup menu. Lexicon to call to toggle between LEFT to move the effect. As you adjust...

  • Page 33: Rear Delay

    Calibration CP-3 Digital Surround Processor When presented with several similar sounds (as in the case of surround Setting Rear Delay sound) we tend to localize on the first sound we hear.Because rear speakers are often closer to the listening area than the main speakers, occasional leakage of the front channel sound into the surround speakers can be audible and distracting.

  • Page 34: Customization

    SETTINGS LOCK Custom Name When the CP-3 is first turned on, it will display a copyright notice with the current software version. The next screen will say: CUSTOMIZED FOR DEMONSTRATION The word "demonstration" can be replaced with the owner's name (up to 16 characters).
  • Page 35 Press SETUP to exit to the main Setup menu. Press SETUP again to resume normal operation. Lastly, the CP-3 is designed to be operated day to day with the Standard Remote. Unless you are an incorrigible tweaker, simply put the Expanded Remote away, with its batteries removed for safe keeping.
  • Page 36 Modifying the Mode Storing a mode Chapter 3 describes the CP-3’s four basic modes and all of their variable parameters. Any changes in the parameters of a mode in the User bank will be automatically recorded and stored for future use. The CP-3 also allows you to store a new version of any Preset or User mode in any User register.
  • Page 37 Customization CP-3 Digital Surround Processor Renaming a mode To rename any mode, press the STORE button. The display reads: STORE MENU >STORE THIS MODE SET MODE NAME. Move the cursor to select "SET MODE NAME". The PARAM button will now move the cursor to one of twelve available spaces in the display, while...

  • Page 38: Using The Modes

    While running a Preset you can change any of its parameters to see how they affect the sound. These changes will be lost when you turn the CP-3 off or when you change modes, unless you explicitly store the changes. (See Page 32.) Changes made in the value of parameters within a User mode,...

  • Page 39: Panorama

    Dolby Stereo movies, bringing the surround track outward into the room. Panorama works with just two loudspeakers. The front speakers are driven entirely from the CP-3’s digital circuits. Panorama will also send a stereo difference signal (left channel minus right or vice-versa) to the side and rear loudspeakers if you have them.

  • Page 40: Using The Cp-3

    Using the CP-3 CP-3 Digital Surround Processor INPUT BALANCE compensates for the occasional source with audible channel imbalance. It is especially important when using Panorama for movies. If the movie sound tracks are unbalanced, the dialog will wander away from the center; adjusting the Input Balance corrects for this.

  • Page 41: Ambience

    Using the CP-3 Ambience Ambience Parameters Ambience generates the appropriate early reflections for stereo simulation of one of six different halls — one rectangular hall and one fan-shaped hall in small, medium and large sizes — and sends the reflections to the side and rear speakers.
  • Page 42 Any stereo material which was not carefully mixed for Surround is a good candidate for playing through Ambience with SPEECH DETECT on. In Ambience, MAIN MUTE mutes allows you to hear only the CP-3 generated effects; EFFECTS MUTE allows you to hear the original, unproc-...

  • Page 43: Reverb

    Using the CP-3 Reverb Reverb Parameters * 0 if configured with no side speakers (Presets only) essed stereo signal. Note that the S/N Optimizer is not active in this mode. The Reverberation mode differs from Ambience in that it does not simulate the early reflections of specific halls, but emphasizes rich, smooth reverber- ant decay in small, medium or large spaces.
  • Page 44 TREBLE ROLLOFF, as in the Ambience mode, is preset to mimic air absorption in actual spaces, being more pronounced in the larger ones. In Reverb, MAIN MUTE mutes allows you to hear only the CP-3 generated effects; EFFECTS MUTE allows you to hear the original, unprocessed stereo signal.

  • Page 45: Surround

    MONO LOGIC takes a monaural soundtrack and sends music and sound effects to the sides and rear through a room simulator mode, while keeping dialog in the center. PRO LOGIC is Lexicon’s all-digital implementation of the Dolby Pro Logic Surround decoding process. Home THX Cinema is designed for any surround sound encoded movies, music, or television programs.
  • Page 46 This automatic feature is why the CP-3 does not have or need an input balance control for Dolby Surround decoding.
  • Page 47 Using the CP-3 Music * OFF if configured with no center speaker ** BYPASS if center speaker configured as NONE or FULL; 63 Hz if configured as SMALL (Presets only) EFFECT LEVEL controls the loudness of the center, side and rear outputs.
  • Page 48 CP-3 Digital Surround Processor REAR ROLLOFF sets the frequency above which the rear channel sound is attenuated. It should be high enough to give presence and airiness to the rear sound, but not so high as to place distracting instrumental overtones or other sounds behind you.
  • Page 49 Using the CP-3 Mono Logic * 6 if configured with center speaker; 15 if configured without center speaker (Presets only) The setting of EFFECT LEVEL is very important in Mono Logic. If this control is set too high, the sound will be too reverberant; too low, a setting will result in an insufficient amount of the effect.
  • Page 50 This automatic feature is why the CP-3 does not have or need an input balance control for Dolby Surround decoding.
  • Page 51 This automatic feature is why the CP-3 does not have or need an input balance control for Dolby Surround decoding.

  • Page 52: Troubleshooting

    See "If all else fails..." on the following page. The CP-3 recalls which remote (Standard or Expanded) was last used to turn it on. Turn the CP-3 off, then back on with the remote you wish to use.
  • Page 53 ON, the CP-3 routinely displays the message "INITIALIZING", or if you find that User settings are being replaced with factory defaults after power OFF, the lithium battery in the CP-3 may be faulty. This part is not field-replaceable, contact Lexicon.
  • Page 54 SETUP TO EXIT Press SETUP to resume normal operation. All of the adjustable parameters in the CP-3 have now been reset to the values assigned when it cleared final Quality Control at the factory. Using the values notated on the Installation Worksheet at the end of this manual, follow the initial setup procedure starting on Page 18.

  • Page 55: Installation Documentation

    CP-3 Digital Surround Processor This section is provided for the documentation of values set during system setup and calibration. The Setup menu selections are reproduced here for your convenience when filling out the worksheet. nstallation Installation Documentation Documentation Installation Documentation...
  • Page 56 Press STORE to exit any sub-menu; press SETUP to return to the Setup menu. Press SETUP again to exit the Setup menu. For your reference, all of the options available in the Setup menu are shown here. Lexicon adjust...
  • Page 57 CP-3 Digital Surround Processor Installed by________________________________Phone____________________Date______________ Input Gain ____dB ______________________ ____dB ______________________ ____dB ______________________ ____dB ______________________ OSD Position bottom Display Time always on Level Meters Amp Gain settings _________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Speaker Configuration [circle selection) 80Hz HPF Center FULL SMALL...

  • Page 58: Specifications

    Storage Temperature: -22° to 167°F (-30° to 75°) Humidity: 95% maximum without condensation 2 hand-held, battery-powered remote control units provided Remote Controls: with each CP-3; each uses 2 AA batteries (provided): 1 18-button "Standard" remote 1 36-button "Expanded" remote 35 mVrms for Dolby level 100 k in parallel with 100pf Less than .025% @1 kHz, max level...
  • Page 59 Lexicon, Inc. 3 Oak Park Bedford, MA 01730 Tel 781-280-0300 Fax 781-280-0490 Lexicon Part #070-08342 Rev 1 Printed in the United States of America...

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