Garmin International Inc 01443 Manual De Usuario
GTX 3000 Installation Manual
Page 2-3
190-00926-01
Revision A
2.3.2 Antenna Location Considerations
Antenna mounting should utilize the aircraft manufacturer’s Type Certificated antenna location and style
of antenna. If a second (diversity) antenna is installed in the aircraft, considerations for its mounting
should be made as outlined in Figure 2-1. The antenna installation should be installed in accordance with
AC 43.12-2A Chapter 3. Note that penetration of the pressure vessel on the pressurized aircraft requires
additional data not contained in this manual. (See Section 2.5)
of antenna. If a second (diversity) antenna is installed in the aircraft, considerations for its mounting
should be made as outlined in Figure 2-1. The antenna installation should be installed in accordance with
AC 43.12-2A Chapter 3. Note that penetration of the pressure vessel on the pressurized aircraft requires
additional data not contained in this manual. (See Section 2.5)
Figure 2-1 Antenna Installation Considerations
a. The antenna (Garmin P/N 010-10160-00 or equivalent) should be mounted away from major
protrusions, such as engine(s), propeller(s), and antenna masts. It should also be as far as
practical from landing gear doors, access doors, or other openings that could shadow (block)
the signal between the transponder antenna and ATC radar on TCAS.
practical from landing gear doors, access doors, or other openings that could shadow (block)
the signal between the transponder antenna and ATC radar on TCAS.
b. The main antenna should be mounted vertically on the bottom of the aircraft (Figure 2-1).
The optional second (diversity) antenna should be mounted vertically on top of the aircraft.
Horizontal separation must be no more than 7.6 merers (25 feet).
Horizontal separation must be no more than 7.6 merers (25 feet).
c. Antenna Separation: DME and TCAS receive signals in the same frequency range that
aviation transponders transmit at, so their antennas should be separated from the transponder
antenna by as much as feasible. Six feet of separation is a guideline. Radar altimeters (should
one be installed on an aircraft with a GTX 3000) also have some potential to receive
interference from a transponder (the transponders’ fourth harmaonic), so it is good practice to
separate transponder and radar altimeter antennas by as much as practical also. Avoid
mounting the antenna within three feet of the ADF sense antenna or any other communication
antenna and six feet from the DME antenna.
antenna by as much as feasible. Six feet of separation is a guideline. Radar altimeters (should
one be installed on an aircraft with a GTX 3000) also have some potential to receive
interference from a transponder (the transponders’ fourth harmaonic), so it is good practice to
separate transponder and radar altimeter antennas by as much as practical also. Avoid
mounting the antenna within three feet of the ADF sense antenna or any other communication
antenna and six feet from the DME antenna.
d. To prevent RF interference, the antenna must be physically mounted a minimum distance of
three feet from the GTX 3000.
If the antenna is being installed on a composite aircraft, sufficient ground plane
material must be added. Conductive wire mesh, radials, or thin aluminum sheets
embedded in the composite material provide the proper ground plane allowing the
antenna gain pattern to be maximized for optimum transponder performance.
NOTE
DRAFT