ATSEP BASIC - COM 2026 Questions with
Verified Correct Answers
What function of an electromagnetic wave is described in hertz?
Frequency
How is the relationship between wavelength and frequency?
The lower the frequency, the longer the wavelength
What is the method to change properties like amplitude or frequency of a periodic wave
to convey a message to it called?
Modulation
What is meant by refraction of a radio wave?
The change in direction of propagation of a wave due to change in its transmission medium
What is meant by a duplex communication system?
Telecommunication between two stations can take place in both directions simultaneously
What aeronautical service is used between 118 - 137 MHz?
Voice communication on the VHF band
What is the purpose of the PTT button on a radio?
To activate the radio transmitter
What is SELCAL?
A selective calling system that allows a ground radio operator to alert an aircrew that the
operator wishes to communicate with that aircraft.
, What communication system allows a controller and an aircraft to communicate via
data link text messages
CPDLC
What is the functionality of the radio receiver?
Amplify and demodulate the signal to make it audible and pass it to the loudspeakers
Which connections are normally used for ground-ground communication between ATS
units?
Telephone or intercom connections
What is the message handling system used to exchange for instance flight plans and
MET messages between ATS units called?
AFTN
What is an example of the aeronautical fixed telecommunication service?
AMHS
What is the functionality called that enables the VCS to select the receiver with best
reception?
BSS
What is the storage requirements for recordings of voice communication?
30 days
What technique is used to share several transmissions on the same transmission path?
Multiplexing
What is meant by circuit switching?
Verified Correct Answers
What function of an electromagnetic wave is described in hertz?
Frequency
How is the relationship between wavelength and frequency?
The lower the frequency, the longer the wavelength
What is the method to change properties like amplitude or frequency of a periodic wave
to convey a message to it called?
Modulation
What is meant by refraction of a radio wave?
The change in direction of propagation of a wave due to change in its transmission medium
What is meant by a duplex communication system?
Telecommunication between two stations can take place in both directions simultaneously
What aeronautical service is used between 118 - 137 MHz?
Voice communication on the VHF band
What is the purpose of the PTT button on a radio?
To activate the radio transmitter
What is SELCAL?
A selective calling system that allows a ground radio operator to alert an aircrew that the
operator wishes to communicate with that aircraft.
, What communication system allows a controller and an aircraft to communicate via
data link text messages
CPDLC
What is the functionality of the radio receiver?
Amplify and demodulate the signal to make it audible and pass it to the loudspeakers
Which connections are normally used for ground-ground communication between ATS
units?
Telephone or intercom connections
What is the message handling system used to exchange for instance flight plans and
MET messages between ATS units called?
AFTN
What is an example of the aeronautical fixed telecommunication service?
AMHS
What is the functionality called that enables the VCS to select the receiver with best
reception?
BSS
What is the storage requirements for recordings of voice communication?
30 days
What technique is used to share several transmissions on the same transmission path?
Multiplexing
What is meant by circuit switching?
