Specifications
2021-07-07
59
7.1.9 Analog Audio Interface
The analog audio option supports a bidirectional
stereo audio
transmission, in near-CD quality
.
The
audio interface
is a 'line level' interface
and it is designed to transmit
the signals of a sound card (or another 'line level' device) as well as to
allow the connection of active speakers to the CON Unit.
Stereo audio can be transmitted bidirectionally at the same time.
Connection of a microphone:
Connect the microphone to the 'audio' input of the CON Unit. There are
two ways to establish this connection:
The output of the CPU Unit is connected to the microphone input of
the sound card (red). Adjust the sound card to provide an additional
amplification (20 dB).
The output of the CPU Unit is connected to the audio input of the
sound card (blue). Choose this connection if the microphone has its
own pre-amplifier.
The CON Unit can also provide pre-amplification of a microphone. Open
the CON Unit, locate the 'MIC' jumper on the audio board and close the
pins.
Specifications Analog Audio
Transmission Format
Digitized virtually CD quality audio
(16 bit, 38.4 KHz)
Signal Level
Line-Level (5 Volt Pk-Pk maximum)
Input Impedance
47 KOhm
Connections CPU Unit
2x 3.5 mm stereo jack plug
(audio in & audio out)
Connections CON Unit
2x 3.5 mm stereo jack plug
(audio in & audio out)
