TSM-321 Practice Problem 1 Fresnel Zone Clearance
How tall must the antennas be if the link operates on a frequency of 1450Mhz, D1=7miles, D2=11miles, and the obstruction is 85 feet high?
TSM-321 Practice Problem 2 Fresnel Zone Clearance
How tall must the antennas be if the link operates on a frequency of 2.450Ghz, D1=5miles, D2=11miles, and the obstruction is 60 feet high?
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9
Miles
4.5
Miles
How tall must the antennas be if the link operates on a frequency of 900Mhz and the total distance is 12 miles? Heights are in feet above sea level and distance is in miles. HAASLHA = 550 feet, HAASLHB = 545 feet, HAASLOBS-4.5mi = 545 feet, HAASLOBS-9mi = 545 feet.

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What is the minimum height of Ha if Hb has to be mounted 60’ above the calculated level?

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10
miles
6
miles
How tall must the antennas be if the link operates on a frequency of 2.450Ghz and the total distance is 18 miles? Assume a 60’ obstruction at each point of concern. Heights are in feet above sea level and distance is in miles. HAASLHA = 460’, HAASLHB = 455’, HAASLOBS-6mi = 480’, HAASLOBS-10mi = 480’.
Obstruction at 6 miles Obstruction at 10 miles
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How much must HB increase if HA is limited to 2/3 of the equal tower height solution?
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How must Ha and HB change to adjust for the terrain HAASL?
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