Bosch Plena Power Amplifier, Руководство по эксплуатации, Страница: 89 / 192

Adjust volume
The voice alarm controller has two types of controls to adjust the BGM volume. The overall
(maximum) volume of the BGM source is set with the master volume control, which is located
below the BGM source selector (Select button, see Select BGM source, page 88). Per zone that
is connected to the voice alarm controller, the local volume can be adjusted with the zone
volume switches, which are located below the zone selection buttons (Zone select, see Select
zones, page 88). Each zone volume switch has six settings, ranging between 0 dB and -15 dB.
0
-
+
- +
CD/Tuner Aux
Select Zone select
Figure 7.5: BGM volume controls
The local volume in the zones that are connected to voice alarm routers must be adjusted
using local volume controls that must be connected to the loudspeaker line of each individual
zone.
Adjust frequencies
The voice alarm controller has two rotary knobs to adjust the sound of the BGM.
–
Use the upper rotary knob to adjust the treble or high frequency content of the BGM.
– Use the lower rotary knob to adjust the bass or low frequency content of the BGM.
0
- +
-
+
CD/Tuner Aux
Select Zone select
Figure 7.6: BGM tone controls
Business calls
Business calls can only be distributed with call stations. It is not possible to use a hand-held
emergency microphone to distribute business calls. Proceed as follows to distribute a
business call:
1.
Select the zones (see section Select zones, page 90).
2. Make the announcement (see section Make the announcement, page 90).
Notice!
It is also possible to distribute business calls using business trigger inputs. When an business
trigger input is activated, the system automatically takes the action that is programmed with
the configuration software.
7.2.3
7.2.4
7.3
Plena Operation | en 89
Bosch Security Systems B.V. Installation and Operation manual 2013.07 | V2.0 |