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Bosch Plena PLE-1MA030-US Installation And User Instructions Manual page 25

Plena mixer amplifier
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Plena Mixer Amplifier | Installation and User Instructions | Connections and settings
table 4.2: Rotary controls
Rotary control
Ducking level control
volume control
When PTT or VOX are selected, the ducking
control controls between 3 dB attenuation (very
little ducking) to –∞ dB (muted).
When ducking, the music is also present on the
Call only output. If you do not want this, set the
ducking control to mute.
Bosch Security Systems | 2007-12 | PLE-1MA030-US, PLE-1MA060-US, PLE-1MA120-US en
Sets the required ducking level when VOX and/or
push to talk is active (see table 4. 1 ). When the
ducking level is set to mute, the music volume will be
fully attenuated; when the ducking level is set to mix,
both music and speech inputs can be heard - music
and speech will be mixed. When ducking the music
input is ducked (attenuated), the microphone/line
inputs are always muted when a call is made.
Attenuates the emergency announcement or signal.
Control range from -25 dB to 0 dB. For safety
reasons, the volume of the emergency
announcement or signal cannot be fully set to zero.
Typical example
Set the ducking level control to
mute if you want the
announcement to be heard without
background music.
Set the volume of the emergency
announcement to a higher level
when the system is being used in
large open areas.
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