Page 16 MPAII Installation and Operations Manual
Technical or Setup Assistance
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This program is designed for harsh conferencing environments. The Last-
On Mode is OFF, which causes all the microphones to gate off when no one
is speaking. Off attenutation is set at the relatively high level of 20. This
makes it more difficult for voice as well as other sounds to gate on a
microphone. This program is best suited for high reverberation, high
speaker-to-microphone coupling, and conferences where considerable
background conversation is taking place. The maximum number of
microphones is set at four, allowing only four microphones to be on at a
time. This helps minimize echo and reverberation that the other location
hears as well as reducing confusion when several people are speaking
simultaneously.
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This program is also designed for harsh conferencing environments. The
Last-On Mode is ON, causing one microphone to be on at all times. This
reduces the apparent “pumping” sound when loud ambient noises are
present. The maximum number of microphones is set at three, which allows
only three microphones on at a time. This helps minimize echo and
reverberation that the other location hears as well as reducing confusion
when several people are speaking simultaneously.
Program Setup
Continued
Table 1. Default Program Parameters
Config Name
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Default
1
2
3
4
5
6
Hold Time (tenths/second)
4
1
4
3
5
1
Gate Ratio (dB)
18
15
12
15
20
20
Ambient Level (dBu)
-85
-85
-85
-85
-85
-85
Maximum No./Microphones
6
6
6
6
4
3
Off Attenuation (dB)
15
12
12
15
20
20
Decay Rate
Slow
Medium
Slow
Slow
Slow
Slow
Adaptive Ambient Mode
On
On
On
On
On
On
Constant Gain Mode
On
On
On
On
On
On
Last-On Mode
Off
On
Off
Off
Off
On
PA Adaptive Mode
On
On
On
On
On
On
First Mic Mode
On
On
On
On
On
On
