NCTI MT1-MT2 QUESTIONS AND ANSWERS 2023
According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic cable is represented by
Double arrows within a small circle on a solid line.
The forward path signal in a traditional tree-and-branch architecture
originates at the heade...
verifying plant reliability includes frequency res
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NCTI MT1-MT2 QUESTIONS AND
ANSWERS 2023
According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic
cable is represented by - answer Double arrows within a small circle on a solid line.
The forward path signal in a traditional tree-and-branch architecture - answer
originates at the headend and is transmitted downstream through coaxial trunk cable
and trunk amplifier.
In a HFC network, - answer Processing equipment in the headend converts the
forward RF signal to a light signal.
During aerial plant construction, - answer The strand is tensioned so its sag profile
matches that of the overhead utility power lines.
With underground plant construction, - answer The fiber-optic and coaxial cables are
often places underground with other utility lines to jointly share construction costs.
Standby power supplies - answer continue providing an output voltage even during a
utility power outage by using a back up power source.
Centralized power configurations - 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 - 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 - answer Have attenuator pads, equalizers, and duplex filters that
control and route the RF signals.
Verifying plant reliability includes - 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? - 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? - answer All types of
leaks must be fixed.
, According to the FCC, the leakage log should contain which of the following? - answer
The probable cause of the leakage.
Which of the following FCC required information must a cable system keep on file for
two years? - 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? - 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? - answer Drive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with regard to
signal leakage? - 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? - 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? - 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? - answer One-quarter wavelength.
Which of the following problem(s) are caused by egress? - 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? - answer 64 or less
What is the maximum allowable signal detectable in the airspace during a flyover? -
answer 10 uv/m.
CLI calculations do not include leakage below: - answer 50 uv/m.
Which of the following is a repair order specification when measuring leakage levels? -
answer The location of the leak.
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