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Subel. C
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60 questions
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48 questions
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60 questions
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60 questions
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30 questions
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Subelement C
Receiving Systems
Section 27
Interference Issues
8
27C1
One of the best methods of reducing noise in a RADAR receiver is?
A.
Changing the frequency.
Correct Answer
B.
Isolation
.
C.
Replacing the resonant cavity.
D.
Changing the IF strip.
8
27C1
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8
27C2
The primary cause of noise in a RADAR receiver can be attributed to:
A.
Electrical causes.
B.
Atmospheric changes.
C.
Poor grounding.
Correct Answer
D.
Thermal
noise
caused by
RADAR
receiver
components
.
8
27C2
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8
27C3
Noise can appear on the LCD as:
Correct Answer
A.
Erratic
video
and
sharp
changes in
intensity
.
B.
Black spots on the screen.
C.
Changes in bearings.
D.
None of the above.
8
27C3
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8
27C4
RADAR interference on a communications receiver appears as:
A.
A varying tone.
B.
Static.
C.
A hissing tone.
Correct Answer
D.
A
steady
tone.
8
27C4
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8
27C5
In a RADAR receiver the most common types of interference are?
Correct Answer
A.
Weather and sea return.
B.
Sea return and thermal.
C.
Weather and electrical.
D.
Jamming and electrical.
8
27C5
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8
27C6
Noise can:
A.
Mask larger targets.
B.
Change bearings.
Correct Answer
C.
Mask
small
targets.
D.
Increase RADAR transmitter interference.
8
27C6
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