Technical data

TRT800H Installation and Operation

Dokument-Nr.: 03.2121.010.71e / Revision: 1.03

2.4.4 Mutual Suppression

Other equipment on board (e. g. DME or TACAN) may transmit in the

same frequency band as the transponder.

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.

2.5 Antenna

2.5.1 Antenna Selection

• For applicable antennas refer to 1.10 Accessories

• Choose an antenna type compatible with the vehicle and the

mounting location.

• Specified features depend on proper installation of the antenna.

• The radiation pattern needs to be verified per aircraft type. Credit

can be taken from the approval of a similar type.

• The electrical interference between the antenna and any other

equipment must be taken into account in such a way that no

reduction of the performance of any other system will occur.

2.5.2 Installation Recommendations

In order to avoid the possibility of human body damage

(e. g. to eyes) and/or ignition of combustible materials by

radiated energy, a safe distance to the installed antenna

must be ensured by adequate installation provisions!

• Take note of the antenna manufacturer’s instructions.

• Blade antennas are ground plane antennas. They can be installed

in metal aircrafts or where a ground plane can be installed.

For installation in composite aircrafts, ground planes are to be

added. The ground plane should be as large as possible but not

less than 30 cm x 30 cm. If in doubt, please contact the aircraft

manufacturer.