Becker RT6201 - Recommendation for the Installation of Two Transceivers in One Aircraft

Becker Avionics
Installation
Aircraft Wiring
DV14307.03 Issue 06 February 2021 Transceivers 6200 Series 107
Recommendation for the Installation of two Transceivers in one Aircraft
This information gives guidance to installers for installations with two AR/RT series VHF air band
communication radios on-board of the same aircraft.
In order to minimize the risk of cross talk issues, a special care has to be applied during the
installation of the subsequent antennas on the fuselage, see "Antenna Installation" page 66.
Becker recommends to configure the muting functionality in the AR/RT series and to do the related
wiring as described here.
2.9.11.1 Configuration - Two Transceivers in one Aircraft
To use the AR/RT series in a dual com context, a muting function can be set. Obey the procedure that
follows:
• The radio has two input and output configurations which are changeable by the installer in
the configuration setup menu.
• The selection of configuration 1 or configuration 2 is done by an external input called
external mike switch.
o To do this it is necessary to adapt a cross link wire from the "Push-To-Talk" input of the
first transceiver to the "External Mike Switch" of the second transceiver.
External Mike Switch (/MIKE_SW)
Pin No.
Pin Name
Direction
Function
J1-24 /MIKE_SW IN
Configuration selector CFG1 and CFG2.
ACTIVE state - closed contact to GND
• The external mike switch is used for selection between the audio in/out configurations
CFG1 and CFG2.
• When /MIKE_SW is active then configuration CFG2 is in use.
• When /MIKE_SW is inactive then CFG1 is in use.
• The configurations CFG1 and CFG2 contain parameters which are set in the configuration
setup pages (for details see "Configuration" page 75).
• You can change the configurations during the flight in the configuration setup.
Push-To-Talk (/PTT)
Pin No.
Pin Name
I/O
Function
P1-17 /PTT1 IN
Push-To-Talk key input 1
ACTIVE state - closed contact to GND
J1-5 /PTT2 IN
Push-To-Talk key input 2
ACTIVE state - closed contact to GND
• There are two Push-To-Talk inputs available /PTT1 and /PTT2 (e.g. one for the pilot and
one for the co-pilot).
• Each input has an internal pull up.
• While the input is connected to ground a current of < 1 mA flows.
o The transceiver enters transmit operation, if one or both inputs are connected to
ground.
• According to microphone(s) configuration, the signal from particular inputs can or cannot
modulate transmissions.