Installation Instructions

ADS-B FDL-DB Dual Band Series
Installation Manual
Document No. 88552 Rev A
FFS Copyright © 2020 All rights reserved.
6-55
6.2.1 UAT Status LED/Discrete Fault Indications
The status LED/discrete is an indicator of a warning or fault reported by the FDL-DB-XVR. The
status LED is visible on the units or the discrete may be connected to a cockpit annunciator.
Potential faults that cause the UAT ST LED to turn on and the Status Discrete to be active
(ground) are listed below:
Problem Reported
Reported by
RF Transmission Failure
PBIT
Bottom Antenna Not Connected (If DC ground check configured)
PBIT
Top Antenna Not Connected (If DC ground check configured)
PBIT
RF Transmission Power Too Low
PBIT
GWSS not communicating or reporting fault
PBIT
RF Transmit Power Supply Low
PBIT
Internal Temperature Too High
PBIT
RF Transmit Reverse Power Too High
PBIT
Nominal Message Rate not once per second
PBIT
Broadcast monitor failure – All message types not transmitted
PBIT
Nominal Message Rate not once per second
PBIT
Internal Power Supply Failure
PBIT
UART Serial Channel Loopback Test Failure
POST
ARINC 429 Channel Loopback Test Failure (FDL-DB-XVR)
POST
General Processing/Interface Hardware Failure
POST
Transceiver Hardware Check Failure
POST