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RSLC Commo Questions and Answers 100% Solved
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Exam of 6 pages for the course MSLC at MSLC (RSLC Commo)
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RSLC Commo3 factors that influence LOS range - answer Frequency of operation
Radio output power
Antenna height
LOS antenna formula – answer Dist (km) = sqrt(12.7x antenna length in meters)
Common LOS radios – answer ASIPS
MBITR
MBITR2
Harris AN/PRC 152
Two types of BLOS – answer TACSAT/SATCOM
High frequency
AN/PRC freq range - answer1.6-60 MHz
AN/PRC 150 VHF power output - answer10 watts
AN/PRC 150 HF power output - answer20 watts
AN/PRC 150 LOS range - answer7-10 km
RF-7800H-MP freq range - answer1.5-60MHz
RF-7800H-MP VHF power outputs - answer1, 5, & 10 watts
RF-7800H-MP HF power outputs - answer1, 5, & 20 watts
RF-7800H-MP LOS range - answer7-10 km
ASIP freq range - answer30-87.975 MHz
ASIP power output - answer4.0-4.4 watts
MBITR freq range - answer30-512 MHz
2 types of HF propagation - answerGround wave
Sky wave
3 components of HF ground wave signal - answerDirect wave
, Surface wave
Ground reflected wave
4 factors that affect ground waves - answerElectrical characteristics of the earth
Height of antenna
Power output and frequency of transmitter
Shape and conductivity of the earth
What do obstacles do? - answerReflect
Diffract
Block
(Absorb)
Where is the ionosphere? - answer30-375 miles above earth's surface (50-600km)
Ionization - answerWhen sunlight breaks apart atoms and "charges" the atmosphere
What is the opposite of ionization? - answerRecombination
What are the four layers of the ionosphere from closest to furthest from earth? -
answerD
E
F¹
F²
What frequencies can reach the F layer of the ionosphere in daytime? - answer10-
20MHz
What does MUF stand for? - answerMaximum usable frequency
What does LUF stand for? - answerLowest usable frequency
What does FOT stand for? - answerFrequency of Optimal Transmission
How can you estimate the FOT? - answer85% of MUF
Two types of atmospheric variations - answerRegular variations
Irregular variations
Three types of regular variations - answerSeasonal variations
11 year sunspot cycle
27 day sunspot cycle
Three types of irregular variations - answerSporadic E - cloud-like patches of ionization
in A layer of ionosphere
Sudden Ionosphere Disturbance (SID) -caused by solar flares
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