LESSON 2
PRACTICE EXERCISE
The following items will test your grasp of the material covered in this lesson. There is only one
correct answer for each item. When you complete the exercise, check your answers with the
answer key that follows. If you answer any item incorrectly, study again that part of the lesson
which contains the portion involved.
1.
You are the S3 of a signal battalion. Using the information below and nonlinear graph
paper (page 2-20), conduct a manual profile to determine if LOS exists between points A
and B.
Elevation at point A
100 meters
Elevation at point B
160 meters
Antenna heights at both sites
50 meters
Point A to point B distance
40 kilometers
High and low points between the two sites are:
4-kilometer distance
120 meters
10-kilometer distance
108 meters
14-kilometer distance
126 meters
18-kilometer distance
120 meters
24-kilometer distance
144 meters
28-kilometer distance
156 meters
34-kilometer distance
150 meters
38-kilometer distance
168 meters
Based on your profile, LOS exists between the two sites.
A.
True
B.
False
2.
Using the preceding profile, determine the first Fresnel zone for the LOS path where d1 =
28 kilometers, d2 = 12 kilometers, f = 4 GHZ, and D = 40 kilometers.
A.
C = about 50 meters
B.
C = about 25 meters
C.
C = about 100 meters
D.
None of the above
2-17
SS0121
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