Bosch Appliances 3.5 Audio inputs, 12 Configure power amplifier, step, 8 to 7 dB mic, Input, Line

Praesideo 3.5 Installation and User Instructions 9 System Configuration

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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	Sets the type of audio source. This is either line (Line) or
	Microphone	(Microphone).
Input gain	-8 to 7 dB (mic)	Sets the input gain of the audio input with reference to the
	0 to 12 dB (line)	nominal value.
Input function	Auxiliary	Sets the input function. Auxiliary inputs (Auxiliary) can be
	AVC	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.

Bosch Security Systems 2011-02