NCTI MT1-MT2 QUESTIONS & ANSWERS
CORRECT!!
According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic
cable is represented by - ANSWERSDouble arrows within a small circle on a solid line.
The forward path signal in a traditional tree-and-branch architecture -
ANSWERSoriginates at the headend and is transmitted downstream through coaxial
trunk cable and trunk amplifier.
In a HFC network, - ANSWERSProcessing equipment in the headend converts the
forward RF signal to a light signal.
During aerial plant construction, - ANSWERSThe strand is tensioned so its sag profile
matches that of the overhead utility power lines.
With underground plant construction, - ANSWERSThe fiber-optic and coaxial cables are
often places underground with other utility lines to jointly share construction costs.
Standby power supplies - ANSWERScontinue providing an output voltage even during a
utility power outage by using a back up power source.
Centralized power configurations - ANSWERSprovide the advantage of increased
reliability through sharing of expensive backup generators and sophisticated monitoring
equipment among different power realms.
When transmitting broadband signals - ANSWERSIn a two way hybrid fiber/coax (HFC)
network, two or more individual optical fibers are required for each optical node location.
RF trunk amplifiers - ANSWERSHave attenuator pads, equalizers, and duplex filters
that control and route the RF signals.
, Verifying plant reliability includes - ANSWERSFrequency 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? - ANSWERSThe 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? - ANSWERSAll types of
leaks must be fixed.
According to the FCC, the leakage log should contain which of the following? -
ANSWERSThe probable cause of the leakage.
Which of the following FCC required information must a cable system keep on file for
two years? - ANSWERSAnnual 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? - ANSWERS112 uV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating the
leak? - ANSWERSDrive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with regard to
signal leakage? - ANSWERSThe 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? - ANSWERSThe 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? - ANSWERSTypical 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? - ANSWERSOne-quarter wavelength.
Which of the following problem(s) are caused by egress? - ANSWERSInterference with
aeronautieal navigation
and communication, amateur radio public service, and cellular communications.
CORRECT!!
According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic
cable is represented by - ANSWERSDouble arrows within a small circle on a solid line.
The forward path signal in a traditional tree-and-branch architecture -
ANSWERSoriginates at the headend and is transmitted downstream through coaxial
trunk cable and trunk amplifier.
In a HFC network, - ANSWERSProcessing equipment in the headend converts the
forward RF signal to a light signal.
During aerial plant construction, - ANSWERSThe strand is tensioned so its sag profile
matches that of the overhead utility power lines.
With underground plant construction, - ANSWERSThe fiber-optic and coaxial cables are
often places underground with other utility lines to jointly share construction costs.
Standby power supplies - ANSWERScontinue providing an output voltage even during a
utility power outage by using a back up power source.
Centralized power configurations - ANSWERSprovide the advantage of increased
reliability through sharing of expensive backup generators and sophisticated monitoring
equipment among different power realms.
When transmitting broadband signals - ANSWERSIn a two way hybrid fiber/coax (HFC)
network, two or more individual optical fibers are required for each optical node location.
RF trunk amplifiers - ANSWERSHave attenuator pads, equalizers, and duplex filters
that control and route the RF signals.
, Verifying plant reliability includes - ANSWERSFrequency 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? - ANSWERSThe 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? - ANSWERSAll types of
leaks must be fixed.
According to the FCC, the leakage log should contain which of the following? -
ANSWERSThe probable cause of the leakage.
Which of the following FCC required information must a cable system keep on file for
two years? - ANSWERSAnnual 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? - ANSWERS112 uV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating the
leak? - ANSWERSDrive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with regard to
signal leakage? - ANSWERSThe 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? - ANSWERSThe 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? - ANSWERSTypical 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? - ANSWERSOne-quarter wavelength.
Which of the following problem(s) are caused by egress? - ANSWERSInterference with
aeronautieal navigation
and communication, amateur radio public service, and cellular communications.
