Bosch LBB 1920 - Table of Contents

Bosch Security Systems | 2003-09 | 3922 988 99482en
Plena Universal Pre-amplifier | Installation and Operating Manual | Table of contents en | 5
Table of contents
Important safeguards..........................................................................................................................................................3
About this manual ..............................................................................................................................................................4
Safety precautions...............................................................................................................................................................4
Table of contents ................................................................................................................................................................5
1 About the equipment ........................................................................................................................................................7
1.1 Controls and connections (front) .............................................................................................................................8
1.2 Controls and connections (rear) ..............................................................................................................................8
2 Internal settings ..................................................................................................................................................................9
2.1 Priority mode setting ................................................................................................................................................9
2.2 Channel settings ........................................................................................................................................................9
2.2.1 Microphone or Line input ..................................................................................................................................9
2.2.2 Mic/Aux input selection .....................................................................................................................................9
2.2.3 Speech filter on/off ..............................................................................................................................................9
2.3 Setting emergency, insertion or cascade ..............................................................................................................10
3 Installation in rack ...........................................................................................................................................................11
4 External settings and connections .................................................................................................................................12
4.1 Connect the DC supply (battery) ..........................................................................................................................12
4.2 Connect a microphone or line-level source .........................................................................................................13
4.3 Insertion or Cascade connection ...........................................................................................................................14
4.4 Connect a Booster amplifier or System pre-amplifier ........................................................................................14
4.5 Connect an emergency input line .........................................................................................................................15
5 Operation .........................................................................................................................................................................16
5.1 Set Line input volume, treble and bass ................................................................................................................16
5.2 Line monitoring ......................................................................................................................................................16
6 Technical data ..................................................................................................................................................................17
6.1 Electrical ..................................................................................................................................................................17
6.2 Performance ............................................................................................................................................................17
6.3 Inputs ........................................................................................................................................................................17
6.4 Outputs .....................................................................................................................................................................18
6.5 Interconnection .......................................................................................................................................................18
6.6 Relays .......................................................................................................................................................................18
6.7 Environmental conditions ......................................................................................................................................18
6.8 General .....................................................................................................................................................................18