Lexicon MC-8, User Manual

Page: 81 / 171

SETUP
Lexicon
3-40
Internal Noise Test
(continued from page 3-39)
Note:
The MC-8 automatically sets volume level to +0dB
when the internal noise test begins. It is recommended
to avoid adjusting master volume level while the test
is in progress to achieve a 75dB THX reference level
(a 75dB SPL meter reading).
When the internal noise test is conducted, a calibration test signal
travels to the Main Zone audio output connectors in the order
listed on the SPEAKER LEVEL ADJUST menu. As the calibration test
signal travels, the cursor automatically scrolls downward through
SPEAKER LEVEL ADJUST menu parameters, highlighting each
speaker parameter as the corresponding output connector is tested.
Each output connector is tested for about 4 seconds.
The SPEAKER LEVEL ADJUST menu can be used to manually adjust
output levels while the internal noise test is conducted. Refer to
page 3-42 for more information.
To manually adjust output levels while the internal noise test is
conducted:
1. Set the SPL meter to “C” weighting and “SLOW” response.
2. Press the remote control Menu and arrows to highlight
the desired SPEAKER LEVEL ADJUST menu parameter.
3. When the desired parameter is highlighted, quickly press the
Menu arrow to select this parameter. A horizontal bar graph
will open on the on-screen display.
4. When the horizontal bar graph opens, follow the instructions
on page 2-11 to adjust the selected parameter. All output levels
should be adjusted to achieve a 75dB SPL meter reading from
the primary listening position.
5. When the desired adjustments have been made, press the
Menu arrow to close the horizontal bar graph and return to
the SPEAKER LEVEL ADJUST menu. The internal noise test will
continue, and automatic scrolling will resume.
Please note the following:
• When the internal noise test is conducted, it is possible to
select a SPEAKER LEVEL ADJUST menu parameter just as the
MC-8 is about to automatically scroll to the next parameter,
causing the MC-8 to send the calibration noise to both
speakers. If this occurs, reselect the desired speaker.
Note:
Main Zone audio output connectors for which the
corresponding CUSTOM or THX SETUP menu
parameter is set to NONE cannot be adjusted during
the internal noise test. These output connectors can
be adjusted during the external noise test, but there
is no need to do so.