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CNM 320 Exam 1 Questions And Answers
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CNM 320 Exam 1 Questions And Answers...
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CNM 320 Exam 1 Questions And Answersradio frequency - ANSWER RF is an abbreviation for which term below?
Wavelength - ANSWER __________________ is measure from two identical points on a
graphed waveform of a RF signal.
1 - ANSWER A frequency of 1 time per second is ______________ hertz.
Effective Isotropic Radiated Power - ANSWER EIRP is ____________.
50 Mhz - ANSWER Signals with a frequency _________ or below normally reflect off the
ionized layers of the atmosphere.
Scattering - ANSWER When a signal encounters an object that is smaller in size
compared to the wavelength of the signal and the object does not absorb the signal,
which of the following occur?
Reflection - ANSWER When a signal encounters an object that is larger in size compared
to the wavelength and the object does not absorb the signal, which of the following
occur?
Refraction - ANSWER When a signal encounters two materials of different density and
the signal changes direction, this is known as what?
Diffraction - ANSWER When a signal encounters an object which will not allow the signal
to pass and the signal bends around the edges of the object, this is referred to as?
Free Space Path Loss (FSPL) - ANSWER This occurs naturally when a signal spreads
, into space.
Fresnel Zone - ANSWER _____________ can be thought of as a football shaped tunnel
between the two sites which provides a path for the RF signals.
60% - ANSWER For a quality link, the first Fresnel Zone should be __________ free of
obstructions.
Construction or Tree Growth - ANSWER If a Fresnel Zone is 60% clear, what has the
possibility of affecting it in the future to cause obstruction?
Line of Sight - ANSWER A good __________ between the sending and receiving antenna is
essential in both Point to Point and Point to Multipoint installations.
Cylinder Antanea with a top on it - ANSWER Which antenna is an Omnidirectional?
Spiky antenna - ANSWER What antenna is an example of a Yagi?
tube hanging off a pole - ANSWER What antenna is an example of a sector?
Curved surface with a pole sticking out from the middle - ANSWER What antenna is an
example of a Parabolic?
Pringles can - ANSWER Which of the following would be an example of a directional
antenna?
Transmitt - ANSWER An antenna that is used for receiving RF signals can also be used
to ____________________ signals.
The physical size of the radiating element is proportional to the wavelength - ANSWER
How does the wavelength of the signal affect the antenna?
The antenna converts radio frequency electrical energy fed to it to an electromagnetic
wave propagated into space - ANSWER What does an antenna do with the electrical
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