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Page 10
ACX1T
Chapter 1: Specifications
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 with 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.
NOTE: The CON Unit can do the pre-amplification of the microphone as well. Open the CON Unit, locate the “MIC” jumper on
the audio board and close the pins.
Table 1-2. Analog audio specifications.
Specification
Description
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
(2) 3.5-mm stereo audio plug (audio in and audio out)
Connections CON Unit
(2) 3.5-mm stereo audio plug (audio in and audio out)
1.1.9 Digital Audio Interface
The digital audio option supports the unidirectional transmission of digital audio data.
Up to three sources can be connected to the CPU Unit. The active source is transmitted. If several sources are active, the XLR
signal takes priority, otherwise the first active signal.
Up to three sinks can be connected to the CON Unit. The signal is available at all outputs concurrently.
DKM Compact Extenders with digital audio option include a built-in sample rate converter that provides predefined sample
frequencies at the CON unit’s output.
The user can set the following parameters directly via a configuration file:
• Activate or deactivate sample rate converter
• Set sample frequency of the sample rate converter. The following sample frequencies are available:
– 32.0 kHz
– 44.1 kHz
– 48.0 kHz
– 96.0 kHz
