Draco ultra DisplayPort KVM Extender
64
2016-02-29
Phantom power of a microphone:
Phantom power is used for condenser microphones in order to operate the
internal electronic components. Therefore you have to connect the
microphone to the input “IN” of the CPU module.
Phantom power can only be activated on the audio input side
(CPU module).
In order to activate phantom power, the switch on the CPU module
has to be set to the ON position.
The provided power is 48 VDC.
It is necessary to ensure that Line-Level devices are not operated with
phantom power in order to avoid unexpected damages to the devices.
Pre-amplification of a microphone:
The balanced audio interface offers the possibility of a pre-amplification of
a microphone at the input „IN“ of the CPU module.
The pre-amplification can be activated for each audio channel
separately.
In order to activate the pre-amplification, the dip switch (1 and 2 for
the left and right channel) of the respective audio channel has to be
set to the ON position at the CPU module.
The default pre-amplification is 9 dB.
The pre-amplification can be configured in the Config.txt file of the
extender with the balanced audio CPU module. Therefore the
respective parameter
GAIN
has to be entered into a new line. The
setting can be configured in 3 dB steps between 9 and 60 dB, for
example:
–
35 dB (enter
GAIN=35
in Config.txt file)
–
48 dB (enter
GAIN=48
in Config.txt file)
Configuration of the sample rate:
The sample rate of the balanced audio module can be configured
individually.
The default sample rate is 48.0 kHz.
