Lexicon CP-3 Plus Owner's Manual page 27

Calibration
Lexicon
Setting
There are four inputs on the CP-3 PLUS . Inputs 1, 2 and 3 switch audio and
video; Input 4 switches audio only and outputs the video signal from Video
Input Levels
Input 1. Each input can be assigned an individual gain level to compensate
for sources with different output levels. You can create a name that will be
displayed on the screen whenever that input is selected and have each input
automatically engage the proper operating mode. For example, Input 1
could have an input level gain of +6dB, display "Video Disc" on the screen,
and engage the Home THX Cinema mode.
To obtain maximum performance from the CP-3 PLUS (or almost any other
signal processor) it is important that the unit be driven to its full input level
without overloading. Despite industry attempts at standardization, there is
still a wide disparity of output levels among different sources. For example,
Compact Discs are often as much as 10-15dB higher in level than video discs.
To compensate for this, each of the four inputs on the CP-3 PLUS can be
assigned a different input gain, assuring optimum performance and consis-
tent volume, regardless of the source selected.
The CP-3 PLUS can also be set to monitor the input level and automatically
optimize the input gain. The level is changed from the auto level to the
manual level whenever the CP-3 PLUS is powered up, or when a new input is
selected. When the input button for the currently active input is pressed, the
current auto level is displayed. If the same button is pressed again, the input
will be set to its manual level. The auto-level system can be defeated for
special situations.
Note: When calibrating the input levels, set the system volume to -25dB or
higher to ensure optimum meter accuracy. You may engage the System
Mute if you do not want to hear the input.
To adjust the input parameters for any of the four inputs, select the input,
Adjusting Input
then press the SETUP button on the remote to call up the main Setup menu.
Parameters
The cursor will be at "INPUTS". (If it is not, select it with PARAM.) Press
PARAM or . The display will show:
Select the input you want to adjust by pressing the appropriate input select
button at the bottom of the remote. Then press PARAM or . The display
will read:
SET INPUT(X) GAIN
MAN+00 AUTO+00dB
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