Lexicon Digital Controller MC-12 - Manual (Page 100)

Setup Lexicon
3-56
EXTERNAL NOISE TEST
Selecting the LEVELS CALIBRATION menu EXTERNAL NOISE TEST
option opens the SPEAKER LEVEL ADJUST menu shown on page
3-54, which manually calibrates output levels.
The external noise test requires an external calibration source such
as an audio calibration disc. When the external noise test is
conducted, the MC-12 activates a listening mode based on the
current Main Zone input source. Refer to the table below for more
information about external noise test listening mode activation.
When a listening mode is activated during the external noise test,
all custom listening mode menu parameter settings are ignored.
The listening mode is applied to the current Main Zone input
source in its factory-default condition. When the external noise test
is finished, the listening mode returns to its custom condition.
EXTERNAL NOISE TEST LEVELS CALIBRATION MANUAL SPEAKERS SETUP
* These listening modes depend on the speaker configuration. Dolby Pro Logic IIx MOVIE
will only load when side and rear speakers are present.
**These listening mode names differ depending on the current input source, speaker
setup, and parameter settings. Refer to the Listening Mode Descriptions section
beginning on page 5-5 for more information.
Note:
When the external noise test begins, the MC-12 automatically sets
volume level to +0dB. Avoid adjusting the master volume level while
the test is in progress to achieve THX reference levels (75dB).
To manually calibrate output levels during the external noise test:
1. Set the SPL Meter to “C” weighting and “SLOW” response.
2. Place the SPL Meter at the primary listening position.
3. Press the or arrow button to highlight the output level
parameter you want. Then, press the button to select this
output level parameter.
The horizontal bar graph shown on page 3-54 displays.
4. Begin playback of the external calibration source and press the
or arrow button to select the output level that achieves a
75dB SPL Meter reading.
5. After selecting the output level, press the arrow button to
close the horizontal bar graph.
6. Repeat steps 2, 3, and 4 until you have set all the output levels
you want.
SPEAKERS SETUP MANUAL LEVELS CALIBRATION EXTERNAL NOISE TEST
INPUT SOURCE LISTENING MODE
2-Channel PLII MOVIE, PLIIx MOVIE*
Dolby Digital DIGITAL**
DTS(-ES) *
5.1-Channel Analog 5.1a STANDARD