General Description
Becker Avionics
Scope of Functionality
18
REU6100
DV64460.03 Issue 11 January 2019
1.5 Scope of Functionality
The REU6100 is for installation in the avionics compartment of an aircraft.
•
It is a device in a standard ATR ¼ short case.
•
The device connectors are on the front and back side of the REU6100.
o
The connectors are coded to prevent misconnection.
•
The REU6100 receives the commands from the audio control devices and accordingly
influences and processes all incoming and outgoing audio signals.
•
The REU6100 supplies the logical functions necessary to operate the transceivers and for
aircraft intercommunication.
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The REU6100 supplies up to 10 different tone signals.
o
The tone signals can be managed through discrete control lines.
•
The audio processing circuits are in a modular design.
o
Each external control device (e.g. ACU610X) is connected to an individual
processing module inside the REU6100.
o
From electrical and mechanical points of view the modules are identical for easy
upgrade and interchange work.
Audio Channel In/Outputs
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The device has 22 balanced audio inputs, as follows:
o
8 transceivers or 7 transceivers and PA amplifier.
o
8 receivers.
o
6 fixed inputs.
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The input sensitivity for each transceiver and receiver is in the range of 2.5…20 V. The
input sensitivity is programmable with the configuration software.
•
The input sensitivity for the fixed input 1…3 is in the range of 5…40 V. The input
sensitivity is programmable with the configuration software.
•
The input sensitivity for the fixed input 4…6 is in the range of 2.5…20 V and under main-
volume control. The input sensitivity is programmable with the configuration software.
•
Control of monitoring volume of the TX and RX channels connected in the range of
0...-48 dB.
•
Main volume control by 0…-48 dB for headphone and, if enabled, for speaker amplifier.
•
Supply of mike audio to 100…250 mV into 150
Ω (standard carbon mike) or 0.5…4
mV
into 20
Ω (dynamic mike):
o
Automatic Gain Control (AGC).
o
Providing the standard mike supply.
•
Supply of a balanced audio output of 0.07…1.5 V into 150
Ω and dis
tribution to 8 TX
modulation lines (configurable).
•
Distribution of the PTT to 8 key lines. Keying logic to ensure transmission priority over
IC operation and to mute speaker outputs as well as non-desired RX and fixed inputs
during transmission.
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Supply of forced monitoring for all TX-channels with mike line selection.
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PTT priority for each operator (configurable high / low).
•
PTT stuck detection.
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Generation of an artificial sidetone from the mike signal for radio transceivers which do not
feature a built-in sidetone during transmission (e.g. FM radios).
o
Natural sidetone.
o
Duplex sidetone.
o
The sidetone can be individually programmed for every of the 8 transceivers by
configuration software from system integrator.
•
Muting of receiver audio during transmission.
•
Phone amplification of summed audio signal to 250 mW into 300
Ω or 500
mW into 8
Ω.
