5 Communications Flashcards
How many HF radios are installed?
Two independent HF communication radios are installed.
How many VHF radios are installed?
Three independent VHF radios are installed,
The ACARS data link is connected to a radio. Which?
The center VHF radio is dedicated to ACARS data link.
ACARS communicates incoming and outgoing data and messages through:
- The VHF C
- The SATCOM system
Does ACARS use VHF or SATCOM?
The ACARS will automatically switch between VHF and SATCOM as required.
The SATCOM system four priority levels:
1 - emergency and distress calls (activates ground station alarm)
2 - regulatory and flight safety calls
3 - non-safety related service calls
4 - passenger cabin calls.
The Iridium SATCOM
communication involves three basic components:
1 - The airplane based Iridium SATCOM system
2 - The ground based Iridium SATCOM network which consists of a gateway and five control stations
3 - The satellite constellation which consists of 66 Low-Earth-Orbit (LEO)
satellites.
SATCOM means?
SATCOM system has failed
SATCOM VOICE means?
SATCOM Voice communication is not available
SATCOM LOST means?
SATCOM Voice communication is temporarily lost
SATCOM AVAIL means?
Resume use of SATCOM Voice communication
SATCOM CALL means?
A GTA incoming call is received
SATCOM DATALINK means?
SATCOM datalink system has
failed.
GROUND CALL means?
Incoming call from the ground crew
Regarding the ACARS. For airborne event sensing and flight crew alerting, the MU interfaces with:
- Digital flight data acquisition unit (DFDAU)
- The flight management computers (FMC)
- The EICAS computers
- The SELCAL system
- The flight deck printer