Bosch Plena LBB1990/00, System Manual

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Plena Voice Alarm System | Basic System Manual | Configuration en | 31
The volume of the mic/line input with VOX
functionality is set with the VOX volume control (see
figure 4.6).
4.6.2 Vox
If the
Vox
switch is in the
OFF
position, the input is
activated when the voltage of the signal of the source is
above the specified threshold. If the
Vox
switch is in the
ON
position, the input is activated when the
VOX
Switch trigger input is closed (see also section 3.13).
4.6.3 Speech filter
If the
Speech filter
switch is in the
OFF
position, a
speech filter is activated for the mic/line input with
VOX functionality. The speech filter improves the
speech intelligibility by cutting off the lower frequencies.
4.6.4 Phantom power
If the Phantom power switch is in the ON position, a
phantom power supply is activated. This switch only has
to be put in the
ON
position if the source is a
microphone that must receive phantom power. If the
source is not a microphone or if the microphone does
not accept phantom power, leave the switch in the
OFF
position.
4.7 Call station
4.7.1 Introduction
The call stations are configured using the DIP switch at
the bottom (see figure 4.7).
4.7.2 Call station ID
The ID of the call station is set using switches 1 to 4.
Since a basic system can contain only 1 call station, the
ID of this call station is 1. This is accomplished by
leaving the DIP switches
1 to 4 in the default OFF
position.
figure 4.6: VOX volume control
Phantom power
Vox
Speech filter
Off
On
Mic/Line
figure 4.7: Call station DIP switches
table 4.6: Call station DIP switches
DIP switch Description
1, 2, 3, 4 Set the ID of the call station. See
section 4.7.2
5, 6 Set the sensitivity of the call station.
See section 4.7.3.
7 Switches the speech filter on (ON)
and off (OFF). See section 4.7.4.
8 Switches termination on (ON) and
off (OFF). See section 4.7.5.
ON
12
3
4
56
7
8