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I N STA L L AT I O N •
LCD PROGRAMMING
28
PA Adaptive Mode. The AP400 recognizes how much loud speak-
er audio is picked up by the microphones and then uses this level
as the new ambient level when audio is present at the power ampli-
fier (Figure 16, below). This prevents loud speaker audio from gat-
ing ON a microphone while still allowing people in the room to gate
ON microphones as they speak. This mode can be turned on
(default) or off by selecting the option and pressing ENTER.
Gentner Communications recommends leaving this feature ON.
Maximum Number of Mics. This parameter sets the maximum
number of microphones that can be gated ON at any one time.
This range can be set from one to eight microphones or OFF. The
default setting is four. To set the maximum number of micro-
phones, scroll through the number ranges (one through eight),
select the desired number and press ENTER.
First Mic Priority. This feature helps maintain maximum audio intel-
ligibility by only allowing one microphone to gate ON when one
person is speaking. Gentner Communications recommends leav-
ing this setting ON. When turned OFF, usually two or more micro-
phones gate on when only one person speaks. However, when this
parameter is turned ON, one person will usually be able to gate ON
only one microphone. It does this by determining the audio level
received by all microphones when the first microphone is gated
ON. This audio level is then used as the ambient level for all other
microphones. This mode can be turned on (default) or off by
selecting the option and pressing ENTER.
Power-Up Screen
Gentner AP400
Version 2.0
System
PA Adaptive Mode
Max # of Mics
1st Mic Priority
Last Mic Mode
Gate Ratio
Off Attenuation
Hold Time
Decay Rate
Manual Ambient
Gate Parameters
Figure 17. Gate Parameters
LCD submenu
Ambient Level
Gate Ratio
New Ambient Level
New Gate Ratio
When the AP400 detects
audio in the power amplifier,
it increases the ambient level
to match the level of the
speaker audio at the
microphones. This prevents
the speaker audio from
turning on the microphones.
Figure 16. PA Adaptive
Mode diagram
