B-007-08: Scatter - HF, VHF, UHF
B-007-08-01:
What kind of propagation would best be used by two stations within each other's skip zone on a certain frequency?
Ground-wave
Scatter-mode
Sky-wave
Ducting
B-007-08-02:
If you receive a weak, distorted signal from a distance, and close to the maximum usable frequency, what type of propagation is probably occurring?
Scatter
Ground-wave
Line-of-sight
Ducting
B-007-08-03:
What is a characteristic of HF scatter signals?
A wavering sound
Reversed modulation
Reversed sidebands
High intelligibility
B-007-08-04:
What makes HF scatter signals often sound distorted?
Energy scattered into the skip zone through several radio-wave paths
Auroral activity and changes in the earth's magnetic field
Propagation through ground waves that absorb much of the signal
The state of the E-region at the point of refraction
B-007-08-05:
Why are HF scatter signals usually weak?
Only a small part of the signal energy is scattered into the skip zone
Propagation through ground waves absorbs most of the signal energy
The F region of the ionosphere absorbs most of the signal energy
Auroral activity absorbs most of the signal energy
B-007-08-06:
What type of radio-wave propagation allows a signal to be detected at a distance too far for ground-wave propagation but too near for normal sky-wave propagation?
Scatter
Short-path skip
Sporadic-E skip
Ground wave
B-007-08-07:
When does scatter propagation on the HF bands most often occur?
When communicating on frequencies above the maximum usable frequency (MUF)
When the sunspot cycle is at a minimum and D-region absorption is high
At night
When the F1 and F2 regions are combined
B-007-08-08:
Which of the following IS NOT a scatter mode?
Absorption scatter
Meteor scatter
Tropospheric scatter
Ionospheric scatter
B-007-08-09:
Meteor scatter is most effective on what band?
6 metres
40 metres
15 metres
160 metres
B-007-08-10:
Which of the following IS NOT a scatter mode?
Inverted scatter
Side scatter
Back scatter
Forward scatter
B-007-08-11:
In which frequency range is meteor scatter most effective for extended-range communication?
30 - 100 MHz
10 - 30 MHz
3 - 10 MHz
100 - 300 MHz
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