AET Communication Systems 2

Question 1

HF radio communication in aviation is primarily used for which purpose?

Accepted Answer

Oceanic and long-range en-route communications

Answer

Short-range ramp communications

Answer

Ground control taxi instructions

Answer

Instrument approach guidance

Question 2

What type of modulation is used by HF aviation voice transceivers?

Accepted Answer

Single Sideband (SSB)

Answer

AM double sideband

Answer

FM

Answer

Pulse amplitude modulation

Question 3

What is the function of a SATCOM system on a commercial aircraft?

Accepted Answer

Enable satellite-based voice, data, and internet communication

Answer

Provide radar weather data

Answer

Transmit transponder codes

Answer

Support VOR navigation

Question 4

Which connector type is most commonly used for VHF antenna connections in aircraft communication systems?

Accepted Answer

BNC or TNC (50Ω coaxial)

Answer

BNC

Answer

TNC

Answer

XLR

Question 5

What is a common symptom of a broken coaxial antenna feed line in a VHF COM system?

Accepted Answer

Very short transmission range and reduced receive sensitivity

Answer

No power to the radio

Answer

Stuck squelch

Answer

Excessive audio distortion

Question 6

What test instrument is used to verify antenna VSWR (Voltage Standing Wave Ratio) in aircraft communications?

Accepted Answer

Wattmeter/SWR meter

Answer

Oscilloscope

Answer

Multimeter

Answer

Spectrum analyzer only