ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev G
1-6
FFS Copyright © 2016 All rights reserved.
maintenance activities and allows an Android tablet to communicate with the FDL-978 through
the ADS-B Maintenance Port Interface (MPI) Android app. Additionally, connections are shown
to an external altitude source (shared with the transponder), the transponder suppression bus,
and an air/ground detection, or Squat Switch. The GPS data can optionally be provided by an
existing aircraft GPS source if it meets the interface requirements of the FDL-978-XVR through
an ARINC 429, or serial connection (see Section 1.7 for details).
Figure 1. FDL-978-XVR Wi-Fi MPI Block Diagram (Typical)
The block diagram shown in Figure 2 identifies an installation using an aircraft mounted FWF-
125 Wi-Fi Transceiver in place of a dedicated MPI Port. This allows traffic and weather data to
be shared with a portable electronic device in flight, and can be used to simplify system
configuration during maintenance activities.
