Interference Test
6-4 Chapter 6: Verification 98-158751-C
6.4 Interference Test
6.4.1 Introduction
It is recommended to do an interference test to ensure that transmission from the
AVIATOR 700S system does not influence any of the primary avionics on the aircraft.
6.4.2 Test procedure
During the test, the aircraft must be on ground. A skilled person should be observing the
instruments.
1. Determine the approximate location and direction towards the relevant satellite to be
used.
2. Position the aircraft so that the SATCOM antenna transmits in the direction of the
other antennas on the aircraft.
Example: If the satcom antenna is tail-mounted, place the aircraft with the nose
pointing in the direction of the satellite. The antenna will then transmit in
the direction of the other antennas located in front of it.
3. You can establish a transmission by, for example, making a video call or sending a
large file via a laptop that is connected to the EFB 1 Ethernet interface.
4. While transmission is ongoing, observe all primary navigation instruments, autopilot,
VOR/ILS, ADF and DME etc. and make sure none of the instruments are influenced
by the AVIATOR 700S transmission.
5. Check aircraft GPS signal-to-noise ratio.
6. Monitor all VHF communication and make sure squelch is not opened unintentionally.
7. If TCAS/ACAS is installed, verify that it is not flagged “FAILED” during SATCOM
transmission.
Important
This test is not a replacement for any EMC tests in connection with e.g. an
STC (Supplemental Type Certificate), TC (Type Certificate) or Field
Approval. It is only an additional practical test of the application.
Important
Make sure that all possible avionics/equipment are powered on when A/C in
ground state.
Note
If any additional avionics are installed at a later stage, do the interference test
again.
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