Code Knob; Warning Messages; Fault Annunciation; Preliminary Checkout - FreeFlight ADS-B FDL-978 Series Installation Manual

ADS-B FDL-978 Series and
Lite Series Installation Manual
Document No. 87343 Rev F

3.1.2.4 Code Knob

The CODE knob is used to set Squawk Codes and Call Sign/Flight IDs. The FN button selects
which item will be updated. Turning the knob will highlight the first digit on the display, then the
digit can be changed as required. Press the ENT button to advance to the next digit. When the
ENT button is pressed on the last digit, the new Squawk Code or Call Sign/Flight ID will replace
the previous value. If the code entry is not completed within 7 seconds the changes are ignored
and the previous code restored.
Code
1200
7000
7500
7600
7700
The Call Sign/Flight ID should correspond to the aircraft call sign entered on flight plan. If no
flight plan is active the aircraft registration should be used as the Call Sign/Flight ID. Use only
letters and digits. If the Call Sign/Flight ID is less than eight characters long entering a blank
character will end it.

3.1.2.5 Warning Messages

If the FDL-978 Lite Series and FDL-978-XVR detects a malfunction, the
indicate that warning messages are present. Depending on the nature of the problem the unit
may not be transmitting ADS-B messages.
To enter the Warning View mode, press the FN button four times and WARNING will be
displayed top center along with a brief description of the fault. In this mode, the Controller
continually requests the active warning messages from the FDL-978-XVR and displays them on
the Controller. Press the FN button again to exit this mode and return to normal operation.

3.1.2.6 Fault Annunciation

If the transponder detects a catastrophic internal failure the screen will indicate FAULT with a
brief statement of the problem. No ADS-B messages will be transmitted when a fault has been
detected.
3.2

Preliminary Checkout

Before the unit is installed and tested, verify that all cables are properly secured. With the FDL-
978 Series, FDL-978 Lite Series, and TC978 removed, turn on aircraft power, and verify the
following:
1. Verify that Aircraft DC bus voltage is present on pins 1 and 16 of P1.
2. Verify that ground is present on pins 17 and 31 of P1.
3-8
Description
VFR Code in the USA
VFR Code commonly used in Europe.
Hijack Code
Loss of communications
Emergency Code
MSG icon appears to
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