Garrecht Avionik GmbH
TRX-2000 ADS-B Traffic Monitor
User Manual
Revision: 1.0b
15
19 DEC 2011
For external ADS-B antenna installation, the use of an of-the-shelf SSR-
transponder antenna (stub or fin type) is recommended.
If a Mode-S transponder is installed in your aircraft, be sure to have entered the
24 Bit aircraft address into the external Flarm (if present) to avoid ghost targets.
2.3.4. FLARM TX/RX Antenna (devices with integral FLARM® module only)
A
λ
/4 - 868 MHz stub antenna (longer antenna) is supplied with the TRX-2000. All instructions for ADS-
B 1090 MHz antennas shown above are mandatory for this antenna as well.
The FLARM® antenna is connected to the TRX-2000 FLARM(R) antenna socket via a MCX type
connector (self locking).
For outdoor installation, appropriate 868 MHz antenna are supplied by the several companies. These
antennas are designed to comply with the requirements for installation in aircraft or cars (withstanding
drag, moisture etc.). For installation of this antenna type, please follow the instructions for installing
external antennas (free line of sight, groundplane etc.) to avoid reducing system performance as the
FLARM(R) system is sensitive against poor antenna installation.
2.3.5. GPS Antenna (devices with integral FLARM® module only)
For operating the TRX-2000. an active GPS antenna with MCX connector is required and supplied with
the device.
All general consideration for antenna installation shown above are suitable for GPS antennas. For
proper function, a GPS antenna requires free line of sight in horizontal and vertical direction.
To avoid interference with other GPS antennae installed in your aircraft, make sure to keep a
minimum distance of 0,6m (2ft) to other GPS antennae.
A GPS antenna must not be installed on the bottom side of the airframe nor under conductive or
shielding material.
As the antenna supplied with the TRX-2000 does not provide cut off capability, it may not installed on
top or bottom of an instrument panel cover, which is part of a removable canopy.
The SMB type connector acts as a pull to release connector for disconnecting
the antenna in case of canopy release for emergency exit. For proper
disconnection in case of pulling, a loose installation of at least 0,3m (1ft) of
the antenna line after the antenna connector is recommended. The remaining
part of the antenna line should be tied to a fixed part.
Do not use a transponder antenna, which is
used by an installed transponder already!!!