117-00020 Rev 4.0 Effective Date: 28 October 2022
Page 6 of 12
Section 4:
Components required for installation
Connectors and fasteners
The modem is connected to a wiring harness which is in turn is connected to a Flightcell DZMx (or
a PC/embedded device).
Following are the terminating connectors and fasteners used with the modem.
Connectors
Main connector
M24308/4-2F (DA-15 Male)
Antenna connector
TNC
Fasteners
4 x M4 screws or bolts sized to fit mounting
surface
Antenna
The Flightcell Iridium Modem requires an antenna installed on the top of the aircraft, or in a location
with a clear view of the sky (for standalone installations), mounted as close to horizontal as
possible. The following should be considered when determining a mounting location on an
aircraft:
»
Maintain good separation from other antennas. Preferred separation is 750mm from L-
band (GPS), TCAS or transponder antennas, but a lesser separation can be applied if
there is limited space on the aircraft.
»
On a helicopter, the antenna can be installed below the rotor blades, but avoid installing it
close to the rotor hub, as the hub and inner rotor can block the
antenna’s
view of the sky.
»
Keep coax cable lengths short to minimize attenuation of transmit and receive signals.
Iridium antenna cables must be selected to keep signal loss within accepted levels. Total signal
loss on the Iridium connection between the DZMx and the antenna should not exceed 3dB at
1645MHz.
Following are recommended Flightcell antennas. These can be used on an aircraft or stand alone.
These can be obtained from Flightcell International or your authorised Flightcell dealer.
Antenna
Application
Part number
Dual Flat Antenna L1 GPS/Iridium BNC/TNC
TSO Cert
Where both Iridium and
GPS are required
ANP_00043
Single Flat Antenna Iridium TNC White TSO
Cert
Iridium only
ANP_00045
