Communication Systems Flashcards
6 cards from real AET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Communication Systems flashcards as text
What is the primary function of an audio control panel (ACP) in an aircraft?
Answer: Select and route audio between radios, navigation receivers, and crew headsets
The Audio Control Panel allows crew members to select which radio or nav receiver audio they hear and which microphone/radio they transmit on.
What does ACARS stand for?
Answer: Aircraft Communication Addressing and Reporting System
ACARS (Aircraft Communication Addressing and Reporting System) is a digital datalink system for transmitting short messages between aircraft and ground stations.
What frequency does the emergency guard channel operate on in aviation?
Answer: 121.5 MHz
121.5 MHz is the international aviation emergency (guard) frequency monitored continuously by ATC and rescue services.
What is the impedance of a standard aviation VHF antenna system?
Answer: 50Ω
Aviation VHF antenna systems are designed for 50-ohm impedance to match standard coaxial cables and transceiver output stages.
In aircraft interphone systems, what is the purpose of a hot microphone (hot mic) mode?
Answer: Allow continuous open-mic communication without PTT
Hot microphone mode keeps the microphone continuously active so crew can communicate hands-free without pressing the push-to-talk switch.
Which regulation governs avionics communication equipment approval in the US?
Answer: TSO (Technical Standard Order) standards
FAA Technical Standard Orders (TSOs) define minimum performance standards that aviation communication equipment must meet for approval and installation.