Lexicon Lexicon MC-12 manual External Noise Test, Input Source Listening Mode

MC-12

SETUP

EXTERNAL NOISE TEST

SETUP SPEAKERS MANUAL LEVELS CALIBRATION EXTERNAL NOISE TEST

Selecting the LEVELS CALIBRATION menu EXTERNAL NOISE TEST option opens the SPEAKER LEVEL ADJUST menu shown on page 3-53, which can be used to manually calibrate 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.

Input Source	Listening Mode
2-Channel	PLII MOVIE
Dolby Digital	DIGITAL*
dts(-ES)		*
5.1-Channel Analog	5.1a STANDARD

*These listening mode names differ depending on the current input source, speaker setup, and parameter settings. Refer to the Listening Mode Descriptions section that begins 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. Press the	and	arrow buttons to highlight the desired
output level parameter. Then, press the			arrow button to

select this output level parameter. The horizontal bar graph shown on page 3-53 will open on the on-screen display.

3. When the horizontal bar graph opens, activate playback of the

external calibration source and press the and arrow buttons to select the output level that achieves a 75dB SPL meter reading from the primary listening position.

4.When the desired output level has been selected, press the arrow button to close the horizontal bar graph.

5.Repeat steps 2, 3, and 4 until all desired output levels have been set.

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