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NCTI exam 2023 with 100% correct answers
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NCTI exam 2023 with 100% correct answers
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NCTIThrough what equipment does a signal pass in the downstream path in the tree-and-branch
architecture? - correct answer -through trunk coax and amplifiers. Line splitters and directional couplers
route some of the signal onto additional trunk runs.
What is the role of amplifiers? - correct answer -boost the power of a signal
How do HFC networks divide the broadband cable operator's coverage area? - correct answer -divide
the broadband cable operator's coverage area into small "serving areas" of 150 to 2,500 customers.
How is the RF signal converted and transmitted in an HFC architecture? - correct answer -at the headend
the light is transmitted by laser over fibers until reaching optical receivers in the nodes.
On the upstream path, what happens to RF signals at the node? - correct answer -When they enter the
node they are converted into light.
What is the benefit of replacing coax with fiber? - correct answer -to provide a more efficient upstream
path because separate fibers are used.
What are the basic components of coax (from the inside out)? - correct answer -(1) the center
conductor; (2) dielectric; (3) solid aluminum sheath or outer conductor; (4) armor (if used); (5) jacket (if
used); and (6) messenger (if used).
What can the center conductor be made of? - correct answer -solid copper or aluminum with a copper
cladding (or coating).
What is the role of the dielectric? - correct answer -To support the center conductor while providing
insulation between the center conductor and aluminum sheath.
, What are the functions of the sheath? - correct answer -to encloses the signals and prevents ingress and
provide structural support, return , and a constant impedance
To operate, what do active devices require? - correct answer -electrical power
How is unity gain maintained in amplifiers? - correct answer -input attenuators and equalizers adjust the
loss so that the gain remains the same and the signal level at the amplifier output is equal across the
network.
What does a trunk station contain? - correct answer -it has attenuation pads, equalizers, slope and gain
controls, and diplex filter and a separate Bridger
What does an optical node on a two-way network contain? - correct answer -optical receivers, upstream
path transmitters, and forward and return RF amplifiers.
What are several uses of status monitoring equipment? - correct answer -It can indicate which
amplifiers need level readjustments, record intermittent problems not present during normal working
hours, Status monitoring equipment & predict failures before they occur by monitoring levels
What are several types of passive devices? - correct answer -RF line splitters, directional couplers,
multitaps, line equalizers, power inserters, and the cable itself.
What are common passive devices used throughout the fiber-optic trunk? - correct answer -Optical
connectors, splitters, and splices
When do non-standby power supplies operate? - correct answer -only when electricity is fed to them by
the utility company
How do standby supplies provide voltage during a power utility outage? - correct answer -with a 12-volt
backup batteries and an AC inverter
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