POWERFLARM FUSION
INSTALLATION MANUAL
Date: 2020-11-10
Version: 1.0
Page: 21 of 38
FLARM Technology Ltd
Hinterbergstrasse 15
CH-6330 Cham
Document Number:
FTD-077
Antennas should be spaced at least 30 cm apart, including other antennas
like COM/NAV, XPDR, etc.
Note:
Installing external antennas on aircraft with a pressure cabin normally
requires an STC.
In addition, the following requirements are applicable for the specific antenna
installations. Approved and acceptable antennas are listed in Appendix B.
2.5.1.1
FLARM A/B
Use the AV-75 external FLARM antennas for most installations. The primary
antenna (FLARM A) should have good view upwards and into the direction of flight
and normally be placed on top of the aircraft. FLARM B (if installed) should be
placed to complement the field of view of FLARM A, normally below the aircraft.
The antennas must be mounted vertically since the radio waves are vertically
polarized (this is unrelated to the radiation pattern). Up to 15° tilt is normally
acceptable.
If using other than the AV-75 antennas, the antennas must be insulated to protect
against electrostatic discharges, e.g. from the human body. Otherwise, the device
may be damaged.
2.5.1.2
SSR/ADS-B 1090ES
The antenna must be mounted vertically, normally on top of the aircraft. Up to 15°
tilt is normally acceptable.
2.5.1.3
GPS
Use a low-attenuation
50 Ω coaxial cable. Attenuation values at 1.57 GHz are
relevant.
Preamplifier gain minus cable attenuation must exceed 17 dB.
The antenna must accept Fusion’s 4.7 V supply and must not draw more than 200
mA. DC resistance of the cable must be taken into account.
The antenna should be mounted horizontally or according to the instructions from
the manufacturer and with a good sky view.
Operation with an existing GPS antenna and an RF splitter may be possible
provided the antenna has a high gain preamplifier and cable losses are not too
high. A splitter with a DC block on one path must be used.
