Lexicon CP-3 Plus Owner's Manual page 30

PLUS
CP-3 Digital Surround Processor
When CP-3 Input and Output levels are set properly, the entire system
PLUS
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. Using the PARAM and the PARAM
level of each individual output until they are all the same relative level. You
can use an external source for this, or the CP-3
calibration signal.
Temporarily turn the system volume down to about -20dB. Press SETUP
and use the PARAM button to select OUTPUT LEVEL. Then press PARAM
or . The display will read:
Use the PARAM button to select the built-in signal generator (INTERNAL
SOURCE) or an EXTERNAL SOURCE. With your choice selected by the
cursor, press PARAM
to select the output to be adjusted; PARAM
level of that output in precise 1dB increments. The Level sub-menu choices
are shown below.
Note that selecting INTERNAL SOURCE automatically disconnects all
audio and video inputs, and plays only one channel at a time. EXTERNAL
SOURCE allows all channels to be heard simultaneously.
If you are using an SPL meter, use the C-weighting with the meter response
on SLOW. From your listening position, hold the meter at about ear level at
arm's length (to avoid body interference). A tripod is useful here. Aim the
microphone at the ceiling and set to a scale incorporating 75dB. Increase the
system volume to 00dB. Now use PARAM
output level of the speaker until the meter reads 75dB. 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.
and
PLUS
INTERNAL SOURCE
EXTERNAL SOURCE
and to activate your selection. PARAM is used
and
and
buttons, adjust the
's internally generated
raise and lower the
to raise or lower the
Calibration
Setting
Output Levels
ATTENTION
Per THX specifications,
the system volume will
be set to reference level
0.0dB when OUTPUT
LEVELS is selected from
the Setup menu.
In this mode, the CP-3 PLUS
matically engages the Home
THX Cinema mode. When you
exit the Output menu, the sys-
tem will return to the previously
selected mode.
auto-
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