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

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