IT2 EXAM QUIZZES WITH VERIFIED
ANSWERS | RATED 100% .
refraction - Correct Answer -RF passing thru a medium and bending
ducting - Correct Answer -Refractive index of layers of air differing and causing rf waves to
travel through a duct.
reflection - Correct Answer -rf bouncing of a surface.
difraction - Correct Answer -rf bending around solid objects
dopplar effect - Correct Answer -fq shift due to moving closer/farther to/from source of rf
modulation - Correct Answer -carrying mesage signal inside another signal that can be
transmitted.
multiplexing - Correct Answer -Allows multiple signals to be combined for transmission
multiplexing equipment - Correct Answer -td-1271 md-1324 both are modems.
similar ways to do dif things.
tdma= time division multiple access
fdma-fq div multiple access
waveform - Correct Answer -shape of wave, act of modulating wave, and equipment used to
move waveform to create comms.
1
, tranverse waves - type of wave - Correct Answer -rf/em
longitudinal - type of wave - Correct Answer -sound
space - type of wave - Correct Answer -antenna to antenna; travels thru troposphere
surface - type of wave - Correct Answer -follows curve of earth; travels near ground.
sky - type of wave - Correct Answer -indirect path from antenna to antenna travels thru
ionosphere.
troposphere - Correct Answer -weather happens here (6-10 miles)
stratusphere - Correct Answer -stable (10-50 miles)
ionosphere - Correct Answer -layer affected by sun's ionizing radiation (50-250 mi)
ionosphere sub layers - Correct Answer -D - 30-55 miles
E - 55-90
F - 80-250
Satellite Orbits - Correct Answer -Geosynchronous - in synch with earths orbt
Molniya- elliptical orbit for use in polar regions. pioneered by users.
Satellite Beam - Correct Answer -Earth coverage beam- less concentrated (17.5); higher
intercept.
spot beam - concentrated
2
ANSWERS | RATED 100% .
refraction - Correct Answer -RF passing thru a medium and bending
ducting - Correct Answer -Refractive index of layers of air differing and causing rf waves to
travel through a duct.
reflection - Correct Answer -rf bouncing of a surface.
difraction - Correct Answer -rf bending around solid objects
dopplar effect - Correct Answer -fq shift due to moving closer/farther to/from source of rf
modulation - Correct Answer -carrying mesage signal inside another signal that can be
transmitted.
multiplexing - Correct Answer -Allows multiple signals to be combined for transmission
multiplexing equipment - Correct Answer -td-1271 md-1324 both are modems.
similar ways to do dif things.
tdma= time division multiple access
fdma-fq div multiple access
waveform - Correct Answer -shape of wave, act of modulating wave, and equipment used to
move waveform to create comms.
1
, tranverse waves - type of wave - Correct Answer -rf/em
longitudinal - type of wave - Correct Answer -sound
space - type of wave - Correct Answer -antenna to antenna; travels thru troposphere
surface - type of wave - Correct Answer -follows curve of earth; travels near ground.
sky - type of wave - Correct Answer -indirect path from antenna to antenna travels thru
ionosphere.
troposphere - Correct Answer -weather happens here (6-10 miles)
stratusphere - Correct Answer -stable (10-50 miles)
ionosphere - Correct Answer -layer affected by sun's ionizing radiation (50-250 mi)
ionosphere sub layers - Correct Answer -D - 30-55 miles
E - 55-90
F - 80-250
Satellite Orbits - Correct Answer -Geosynchronous - in synch with earths orbt
Molniya- elliptical orbit for use in polar regions. pioneered by users.
Satellite Beam - Correct Answer -Earth coverage beam- less concentrated (17.5); higher
intercept.
spot beam - concentrated
2
