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MPAII Installation and Operations Manual Page 15
Technical or Setup Assistance
Telephone: 800.945.7730 (USA) or 801.975.7200 (worldwide) • Worldwide Web @ http://www.gentner.com
on the MIC 1–8 LEDs. The PA LEVEL LED [4] inidicates whether the
available configuration programs are default or user configuration:
Green
Six factory-default programs
Red
Six user-configuration programs
While holding down the PROGRAM ENABLE button [9], press the
PROGRAM SELECT button [7] to scroll through the programs one at a
time. When the desired program appears, release the PROGRAM ENABLE
button to load the program.
PROGRAM NOTE:
If the MPAII is turned off or loses power, the program that was selected when
power was lost will automatically load when the power is restored.
Default Program Description
Below are brief descriptions of each of the green (default) programs. Gentner
Communications suggests you try each one to find the one that best suits your
environment. If none of the default programs is right for your particular
situation, you can adjust one of the existing programs or create a new
program using your own parameters (see Custom Programming, Page 17).
Green 1
This program is designed for the small-to-medium sized conference room
where ambient noise levels are moderate (30–45dB SPL c weighted) and
minimal or no acoustic treatment has been done to the room. When no one
is talking, all microphones gate OFF, reducing feedback potential and
ambient noise. This program works well in most applications.
Green 2
This program is designed for a room that has a better acoustic environment
than the room described in Green 1. The Last-On Mode is ON to keep one
microphone active at all times. This prevents the ambient noise “pumping”
effect and helps make smooth transitions between two or more people. The
gate ratio is lower than in Green 1, causing the mics to gate OFF at lower
voice levels. The amount of off attenutation is set at 12, which also helps
reduce the “pumping” effect. To use this program, the room should have
some acoustic treatment to minimize reverberation and speaker to
microphone coupling.
Green 3
In Green 3, the Last-On Mode is OFF, which causes all microphones to gate
off when no one is speaking. The gate ratio is set at the relatively low value
of 12. This increases microphone sensitivity to voice and fluctuations in
ambient noise. This program should be used in a room that is acoustically
treated and has very low ambient noise.
Green 4
This program is identical to Green 1 except that the gate ratio is 3dB lower
and the hold time is reduced to one-tenth of a second. The decrease in gate
ratio causes the microphones to gate on easier when people begin speaking.
Decreased hold time causes the microphones to gate off faster at the end of
sentences. This program may be preferred to Green 1 in fast-paced
discussions.