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WorksheetsF023 TAv 21 - Comms EO 21.01
Total questions: 14
Worksheet time: 9mins
What factor(s) determine the range of a Ground Wave?
The terrain the wave is traversing (Land or Sea)
The time of day
The height of the ionosphere
The line of sight in relationship to the horizon
What factor(s) determine the range of a Sky Wave?
The terrain the wave is traversing (Land or Sea)
The frequency
The condition of the ionosphere
The line of sight in relationship to the horizon
Transmitter power
Which radio band is used in systems to permit aircraft to operate within controlled airspace (air to air and air to ground)
(a)
Which radio band is used in systems that enable the aircraft to operate successfully in a battlefield scenario, (secure communications with allied platforms)
(a)
Which of the following radio wave bands use Ground (surface) Waves as their method of propagation?
VLF
MF
HF
UHF
VHF
Which of the following radio wave bands use Sky Waves as their method of propagation?
VLF
MF
HF
UHF
VHF
Which of the following radio wave bands use Direct (space) Waves as their method of propagation?
VLF
MF
HF
UHF
VHF
in the diagram regarding sky wave propagation what term is being represented by a?
Critical Frequency
Sky Wave
Ground Wave
Dead Space
Skip Distance
in the diagram regarding sky wave propagation what term is being represented by b?
Critical Frequency
Sky Wave
Ground Wave
Dead Space
Skip Distance
in the diagram regarding sky wave propagation what term is being represented by c?
Critical Frequency
Sky Wave
Ground Wave
Dead Space
Skip Distance
in the diagram regarding sky wave propagation what term is being represented by e?
Critical Frequency
Sky Wave
Ground Wave
Dead Space
Skip Distance
A radio system that only allows transmission in one direction at a time is called...
Simplex
Duplex
Multiplex
PoliPlex
A radio system that allows transmission in both directions simultaneously is called...
Simplex
Duplex
Multiplex
PoliPlex
the range of a Space Wave signal depends on...
The distance to the horizon
The altitude of the transmitter and receiver
Obstacles
The condition of the ionosphere
The frequecy
