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NCTI - 2023 Exam Questions With Well Elaborated Answers
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NCTI - 2023 Exam Questions With Well Elaborated Answers
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NCTI - 2023 Exam Questions With WellElaborated Answers
What major sources of television programming are available to broadband cable
operators? - AnswerOver-the-air; terrestrial microwave; direct cable feed; satellites; and
local origination programming.
What are the three main elements of a broadband cable network? - AnswerThe
headend; the distribution network composed of coaxial cable and/or fiber-optic cable;
the drop at the customer premises.
In a broadband cable network, what group is responsible for ensuring that the network
remains in smooth running order by dispatching crews to carry out routine system
testing, preventative maintenance, and equipment servicing and replacement? -
AnswerNOC
In a broadband cable network, which administrative group maintains communication
with installers, construction and maintenance technicians, and the customer service
departments? - AnswerDispatch
In the United States, downstream broadband RF
Radio frequency
signals traveling inside coaxial cable begin at what frequency? - Answer54 MHz.
What is typically used to represent computer characters or words? - AnswerASCII code.
What analog TV impairments are no longer problems in digital video? - AnswerGhosting
and snow.
What happens as RF Radio frequency signals travel over cable? - AnswerRF signal
levels decrease over distance.
What type of traffic is transported over a broadband cable network's return path? -
AnswerVoice and data traffic along with communications via STB Set-top boxes and
other monitoring devices throughout the network.
What are the factors that determine a conductor's resistance? - AnswerConductor
material, diameter, length, and temperature.
OTA Over-the-air broadcast signals are acquired at the headend using - AnswerYagi
and log periodic antennas.
, During the 1980s, what led to the expansion in cable system channel capacity? -
AnswerFiber-optic technology.
Digital and analog signals are different in that - AnswerDigital networks can combine, or
multiplex, several different signals into one transmission
In the CARS
Cable antenna relay service - AnswerThe over-the-air signal is converted to a frequency
in the 12.7-13.2 GHz band.
One difference between FM Frequency modulation and AML Amplitude modulated link
techniques in microwave signal transmission is that - AnswerFM transmits a single
channel, and AML sends blocks of broadband channels between headends and hubs.
A satellite transponder - AnswerReceives, amplifies, transmits (at a different frequency),
and re-amplifies analog or compressed digital signals.
A single-beam TV receive-only (TVRO) antenna - AnswerHas a parabolic shape that
reflects the downlinked signal from all locations on the dish surface onto a central focal
point, which collects the reflections and provides maximum signal reception
What device in the headend separates an incoming signal into baseband video and
audio elements? - AnswerDemodulators.
Which of the following is occurring inside the headend? - AnswerVideo signals are
amplitude modulated; audio signals are frequency modulated; and color signals are
amplitude and phase modulated.
Once signals are ready for transmission out of the headend, what is the last thing that
needs to be done to the signals? - AnswerMultiplexed.
In the tree-and-branch architecture, how is the downstream signal from the trunk fed to
the distribution branches? - AnswerWithin each trunk amplifier, a portion of the
downstream is fed to a bridger amplifier to boost the signal before being split and routed
to the distribution branches.
What is a common solution when congestion from modem activity and traffic becomes
unacceptable in a HFC
Hybrid fiber/coax
network? - AnswerNode splitting, the subdividing of serving areas into two or more
smaller serving areas.
How can a less-experienced technician identify what non-standard symbols on the
network design maps represent? - AnswerThe legend at the bottom of the network
design map that defines the map symbols, cable types, and amplifier data.
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