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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | 9 | System Configuration en | 348
43.3.3 Audio inputs
figure 43.12: Configure power amplifier, step 4
table 43.8: Audio inputs configuration
Item Value Description
Input Unique name for the audio input. The input can be enabled
and disabled using the checkbox.
Audio type Line
Microphone
Sets the type of audio source. This is either line (Line) or
(Microphone).
Input gain -8 to 7 dB (mic)
0 to 12 dB (line)
Sets the input gain of the audio input with reference to the
nominal value.
Input function Auxiliary
AVC
Sets the input function. Auxiliary inputs (Auxiliary) can be
used to make calls. AVC inputs (AVC) are used to
measure the ambient noise level.
Phantom On, Off Specifies whether the microphone receives a phantom
supply (On) or not. This option is only visible if (2) is set to
Microphone.
Supervision On, Off Switches supervision on (On) and off (Off) for the
microphone. This option is only visible if (2) is set to
Microphone. The phantom supply is only active when the
microphone input is active.
Connection supervision On, Off Specifies whether the 20 kHz pilot tone detector of the
input is enabled (On) or disabled (Off). This function is only
available if the Audio type is set to Line. It provides cable
and connection supervision if the source uses a pilot tone.