User manual LEXICON CP-3 REV 1

[. . . ] Owner's Manual CP-3 Digital Surround Processor Lexicon 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. Report any shipment damage to the carrier at once; report equipment malfunction to your dealer. Precautions This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. [. . . ] Press PARAM to select the next channel specified in the Configuration menu and continue in this manner through all the channels. Be sure to record the values on the Installation Worksheet provided at the end of this manual. Press SETUP to save the settings and return to the Setup menu. PAL and SECAM NOTE: Because the CP-3 is not capable of generating PAL or SECAM composite video signals by itself, during INTERNAL NOISE generation (when all inputs are turned off) users with PAL or SECAM TVs will have to rely on the LCD when adjusting Output Levels. 25 Calibration Lexicon 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. The system should be reasonably well balanced, although not actually calibrated for precise playback level matching. With the system volume at 0dB, the internal noise source should be at the same level at which film dialog sounds comfortable. NOTE: If the CP-3 is connected in the tape monitor or signal processorloop of a preamp, integrated amp, or receiver, or if any of the amplifiers used in the system have gain (volume) controls, the level settings on them will affect the balance of the CP-3 outputs. Generally, the gain controls of these amps should be set at or near maximum. You should record the values of these controls on the Installation Worksheet provided at the end of this manual for later reference. Subwoofers The SUBWOOFER output is created by summing the left and right inputs, then filtering out frequencies above 80Hz at a rate of 24dB per octave. For the tragically technical, this is a Linkwitz-Riley LPF -6dB @ 80Hz. Many of the better subwoofers have their own crossover (complementary low and high pass filters) and amp built in. With these, it is often better not to use the CP-3 SUBWOOFER output which has already been filtered. Instead, connect the CP-3 main (FRONT) left and right outputs to the inputs of the subwoofer crossover. Connect the CP-3 SUBWOOFER output to the amplifier driving the main speakers. This has the advantage of bi-amping: all the low bass is handled by the subwoofer; the main speakers handle only midbass and up (usually resulting in better-sounding main speakers). If you want to run the main speakers full range, the sub can be wired in parallel to the main amp using a Y-connector. Since the center channel will now be running full range, select SMALL center in the Speaker Config menu. This turns on the BASS SPLIT parameter in the Preset modes, splitting low frequencies off the center channel and feeding them to the left and right front outputs. Remember to adjust this parameter in any User registers you program, as it is initially set to BYPASS. A little experimentation goes a long way in determining the optimum value for BASS SPLIT. Too high a cutoff will make some male vocals sound chesty; too low a cutoff causes bass loss. [. . . ] If you find that when the rear-panel master POWER switch is turned 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. If the unit is still behaving erratically, perform the Restore Defaults procedure described on the following page. Clicking in audio Interference with AM, FM, TV or Cable TV Erratic recall of modes Rear speaker off in THX mode If all else fails. . . 50 CP-3 Digital Surround Processor Troubleshooting Routine Maintenance Other than occasional replacement of the batteries in the remote control units, the CP-3 requires minimal maintenance. Use a soft, lint-free cloth slightly dampened with warm water and a mild detergent to clean the exterior surfaces of the unit. Do not use alcohol, benzene or acetone-based cleaners or any strong commercial cleaners. [. . . ]