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NCTI MT1 Questions with complete solution 2023
NCTI MT1 Questions with complete solution 2023
[Meer zien]Voorbeeld 2 van de 11 pagina's
Voorbeeld 2 van de 11 pagina's
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Voorbeeld van de inhoud
NCTI MT1-MT2According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic
cable is represented by - correct answer Double arrows within a small circle on a solid
line.
The forward path signal in a traditional tree-and-branch architecture - correct answer
originates at the headend and is transmitted downstream through coaxial trunk cable
and trunk amplifier.
In a HFC network, - correct answer Processing equipment in the headend converts the
forward RF signal to a light signal.
During aerial plant construction, - correct answer The strand is tensioned so its sag
profile matches that of the overhead utility power lines.
With underground plant construction, - correct answer The fiber-optic and coaxial
cables are often places underground with other utility lines to jointly share construction
costs.
Standby power supplies - correct answer continue providing an output voltage even
during a utility power outage by using a back up power source.
Centralized power configurations - correct answer provide the advantage of increased
reliability through sharing of expensive backup generators and sophisticated monitoring
equipment among different power realms.
When transmitting broadband signals - correct answer In a two way hybrid fiber/coax
(HFC) network, two or more individual optical fibers are required for each optical node
location.
RF trunk amplifiers - correct answer Have attenuator pads, equalizers, and duplex
filters that control and route the RF signals.
Verifying plant reliability includes - correct answer Frequency response sweeping,
which is adjusting RF amplifier circuits to amplify all frequencies in the bandpass
spectrum as equally as possible
Which of the following is a requirement in the process for measuring leakage using a
dipole antenna, as required by the FCC? - correct answer The antenna must be placed
3 meters from the system components and 3 meters from the ground.
Many cable companies require which type of leaks to be fixed? - correct answer All
types of leaks must be fixed.
, According to the FCC, the leakage log should contain which of the following? - correct
answer The probable cause of the leakage.
Which of the following FCC required information must a cable system keep on file for
two years? - correct answer Annual CLI calculations, regular (quarterly) monitoring
programs, and a list of all channels used in the aeronautical bands.
If your leakage detector indicates there is a leak and displays a reading of 14 microvolts
per meter (uV/m) when you are 80 feet from a possible leak source, what is the
approximate calculated level of the leak from 10 feet? - correct answer 112 uV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating the
leak? - correct answer Drive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with regard to
signal leakage? - correct answer The demand maintenance procedures can improve
the CLI measurement results by identifying and correcting the largest leaks first.
When troubleshooting signal leakage in the drop system, what is indicated if all signs of
signal leakage disappear when the ground block is disconnected and terminated on the
side connected to the customer premises? - correct answer The backward route from
the ground block to the tap can be eliminated as a source of The backward route from
the ground block to the tap can be eliminated as source of leakage.
Which typical over-the-air signal sources can cause a false alarm with a signal leakage
detector? - correct answer Typical sources include aircraft communication signals and
ham, mobile, and government radio broadcasts.
When adjusting or selecting the elements of a dipole antenna for measuring signal
leakage, what is the approximate length of each element relative to the wavelength of
the signal being measured? - correct answer One-quarter wavelength.
Which of the following problem(s) are caused by egress? - correct answer Interference
with aeronautieal navigation
and communication, amateur radio public service, and cellular communications.
What cumulative leakage index (CLI) meets Federal Communications Commission
(FCC) requirements? - correct answer 64 or less
What is the maximum allowable signal detectable in the airspace during a flyover? -
correct answer 10 uv/m.
CLI calculations do not include leakage below: - correct answer 50 uv/m.
Which of the following is a repair order specification when measuring leakage levels? -
correct answer The location of the leak.
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