TRT800A / P/N 800ATC-A-(2xx)-(3xx)
Operation and Installation
18
Document-No: 03.2114.010.71e / Revision: 2.00
3.6
Equipment Connections
3.6.1
Electrical Connections
One 15 pin D-SUB miniature connector includes all electrical
connections, except for the antenna. Use only an External Memory
TRT800EMxx as this is part of the certification and includes a memory
device in which the ICAO 24-bit Aircraft Address is stored.
3.6.1.1 Mutual Suppression
Other equipment on board (e. g. DME) may transmit in the same
frequency band as the transponder.
If such a device is installed a suppression wiring shall be installed in
order to protect the receiving parts of the different devices from in-band
transmissions.
Mutual suppression is a synchronous pulse that is sent to the other
equipment to suppress transmission of a competing transmitter for the
duration of the pulse train transmission. The transponder transmission
may be suppressed by an external source and vice versa.
To activate mutual suppression connect the SUPP_I/O signal to the
according signals of the other equipment
3.6.1.2 Ground Switch
If an external Ground-Switch is connected to the transponder and
activated in the setup, the transponder can detect if the aircraft is
airborne or on the ground This allows the transponder to automatically
activate the Ground mode whenever the aircraft is on ground.
In order to activate this feature, the input „FLY-GND“ must be connected
to an external switch which connects the input pin with „GND“ when the
gear is weighted, or remains open in the other case.
This feature must additionally be activated in the Setup. For details on
configuration please refer to section 4.5.4.
The (+UB Power) wire has to protected by circuit breaker
(2 Amp.)!
