Lesson II NCTI STUDY GUIDE question and answers rated A+ 2023
Through 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 t...
Lesson II NCTI STUDY GUIDE question
and answers rated A+ 2023
Through 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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