Download  Print this page

Microphone Inputs; Emergency Input - Bosch LBB 1903/10 Installation And Operating Manual

Plena mixer amplifier installation and operating manual
Hide thumbs

Advertisement

Plena Mixer Amplifier | Installation and Operating Manual |

4.4 Microphone inputs

Figure 4.4
Dependent on the microphone choose between the XLR with Phantom power and the 6.3 mm phono jack
connector. Use an extension cable (1) if necessary. When using input 3 or 4 to connect microphones, set the
switches (6) to Mic. When using these inputs as line-inputs, set the switches (6) to Line. To cut-off the lower
frequencies of the signal, activate the speechfilters on the PCB (see §2.2).

4.5 Emergency input

Figure 4.5
The emergency input is for emergency announcements/signals and obviously has the highest priority (all other
inputs are overruled). The emergency volume -which cannot be affected by the master volume control (11) - can be
set at 8, using a screwdriver. It can not be set to zero.
Caution
A connection to a telephone network must always be made via a telephone coupler that provides adequate
isolation between the telephone network (PBX) and the Plena system. The telephone coupler must also meet
all relevant requirements for this type of communication equipment as imposed by law and/or responsible
telecommunication organisations in the country of use. Never try to make a direct connection between the
telephone network and the mixer amplifier.
Bosch Security Systems | 2003-09 | 3922 988 92883en
6
Te l/ E
L
m e r.
0
R
0 2
C D
C h im
A u x
e
1 - -3
L in e
O u t 1
4 .5
V
M ic /L
in e
1
2
3
8
Tel/ Eme
L
r.
0
R
0 2
CD
Chim
Aux
e
1- -3
Line
4 .5
Out 1V
T e l/ E
L
Mic /Lin
m e r.
e
1
0
2
3
R
0 2
C D
C h im
e
A
1 - -3
4 .5
1
2
External settings and connections
6
Tel/E
L
0
mer .
R
0 2
CD
Out
Chim
e
Aux
1- -3
Line
4 .5
Out 1V
In
Inc
Mic/ Line
Mic/ Line
1
2
115 V/23
0V
3
4
O u t
Warn
ing
This
appa
ratus
must
be earth
ed
In
In c
M ic /L
in e
1
4
Out
In
Inc
Mic /Lin
e
115 V/23
0V
4
War ning
This
appa
ratus
must
be earth
ed
en | 15

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Lbb 1906/10Lbb 1912/10Lbb 1914/10