ATR833 / P/N 833-(xxx)-(2xx)
Operation and Installation
32
Document-No.: 01.1403.010.71e / Revision: 3.01
4.6 Equipment Connections
One 25 pin D-SUB miniature connector includes all electrical
connections, except for the antenna.
4.6.1 Microphone-Connection
Microphone Input
Left
Right
Standard
(headset)
MLS
MRS
Dynamic
(glider’s gooseneck
microphone)
MLD
MRD
The inputs for standard microphones are appropriate for input voltages of
50 mVpp to 2 Vpp. These inputs have a bias voltage of 8 V at 330 ohms.
Sensitivity is adjustable in the configuration menu (see 3.5).
The inputs for dynamic microphones are appropriate for input voltages of
5 mVpp to 10 mVpp. These inputs have no bias.
In general standard microphones (headsets) MLS/MRS and dynamic
microphones (hand/gooseneck) MLD/MRD can be used simultaneously.
In motor gliders, when the engine is running, the dynamic microphones
should be turned off (switch MLD/MRD inputs to GND), in order to avoid
the transmission of the engine’s noise.
If no dynamic microphone is installed, the input sensitivity for MLD/MRD
shall be set to 1 (see 3.5).
Per input, up to two microphones can be connected in parallel.
The (+UB)-wire has to protected by circuit breaker (4 Amp.
slow-blow)!
Unused microphone inputs should be short-circuited.
Summary of Contents for ATR833-OLED
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