PowerFLARM Core Manual v.150 International
8
•
The PowerFLARM CB must be separate from other CBs of
essential avionics.
•
In flight the pilot must be able to isolate PowerFLARM Core
from the aircraft's electrical power system without inter-
rupting the power supply to other essential avionics.
Display
•
Use high quality shielded cable for the RX and TX connec-
tions.
•
Up to 5m cable length are acceptable.
•
In case the display requires 3VDC operating voltage, the re-
spective connection on the RJ45 or D-Sub connector may be
used. Otherwise, the display should be supplied directly
from the aircraft’s bus and protected by its own CB as per
the display’s installation manual.
External antennas
The antennas provided with PowerFLARM Core are suitable for in-
cabin use only. External antennas for FLARM and ADS-B are howev-
er recommended for most aircraft. If external antennas are in-
stalled, please follow the considerations below.
•
Ensure high quality in custom-made cable/connector as-
semblies.
•
Minimize cable lengths to ensure maximum signal strength.
•
Antennas should be spaced at least 30cm apart, including
other antennas like COM/NAV, XPDR etc.
•
See also the ‘Connections’ section for antenna and place-
ment considerations.
FLARM A/B
•
Use low-
loss 50Ω coaxial cable such as
Aircell 7, RF-240,
LMR-195, RG-58 or RG-174.
•
Total attenuation of the cable at 900MHz should not exceed
3dB. This translates into a maximum cable length of ca.
15m for Aircell 7 or 3m for RG-174.
