Bosch Plena Voice Alarm System Service Manual download pdf (Page 31)

Bosch Security Systems | 2005-01 | 9922 141 10363en

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

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.

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