NCTI MT1-MT2 EXAM QUESTIONS &
ANSWERS16
A wavelength-isolating power meter is most commonly used in - ANSWERS-Point-to-multipoint
FTTX installations.
Optical loss test sets perform multiple functions because they include the features of multiple
pieces of test sets The features of which other test sets a combined into an optical loss test set?
- ANSWERS-A stabilized light source, an optical return loss meter, an enhanced A stabilized light
source, an optical return meter, an enhanced optical power meter, and an optical talk set.
Regarding various optical power meter types, - ANSWERS-Enhanced power meters evolved for
roles where measurements need to be easily stored, recalled transmitted, and downloaded.
When measuring transmit and receive power with an optical power meter, - ANSWERS-The
meter's calibration must be traceable to the National Institute of Standards Technology (NIST).
When measuring end-to-end attenuation, - ANSWERS-The light source and optical power meter
must be referenced together prior to making any field measurement.
A light source - ANSWERS-Is crucial for accurately measuring optical fiber power and
attenuation.
When a laser light source is used to test fibers, - ANSWERS-A 2 kHz modulation provides a test
signal that allows the fiber under test to be detected by an optical fiber identifier.
Optical fiber identifiers - ANSWERS-Detect live traffic signals or modulated test signals on an
individual optical fiber.
,According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic cable is
represented by - ANSWERS-Double arrows within a small circle on a solid line.
The forward path signal in a traditional tree-and-branch architecture - ANSWERS-originates at
the headend and is transmitted downstream through coaxial trunk cable and trunk amplifier.
In a HFC network, - ANSWERS-Processing equipment in the headend converts the forward RF
signal to a light signal.
During aerial plant construction, - ANSWERS-The strand is tensioned so its sag profile matches
that of the overhead utility power lines.
With underground plant construction, - ANSWERS-The fiber-optic and coaxial cables are often
places underground with other utility lines to jointly share construction costs.
Standby power supplies - ANSWERS-continue providing an output voltage even during a utility
power outage by using a back up power source.
Centralized power configurations - ANSWERS-provide the advantage of increased reliability
through sharing of expensive backup generators and sophisticated monitoring equipment
among different power realms.
When transmitting broadband signals - ANSWERS-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 - ANSWERS-Have attenuator pads, equalizers, and duplex filters that control
and route the RF signals.
, Verifying plant reliability includes - ANSWERS-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? - ANSWERS-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? - ANSWERS-All types of leaks
must be fixed.
According to the FCC, the leakage log should contain which of the following? - ANSWERS-The
probable cause of the leakage.
Which of the following FCC required information must a cable system keep on file for two years?
- ANSWERS-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? - ANSWERS-112 uV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating the leak? -
ANSWERS-Drive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with regard to signal
leakage? - ANSWERS-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? - ANSWERS-The backward route from the ground block to
ANSWERS16
A wavelength-isolating power meter is most commonly used in - ANSWERS-Point-to-multipoint
FTTX installations.
Optical loss test sets perform multiple functions because they include the features of multiple
pieces of test sets The features of which other test sets a combined into an optical loss test set?
- ANSWERS-A stabilized light source, an optical return loss meter, an enhanced A stabilized light
source, an optical return meter, an enhanced optical power meter, and an optical talk set.
Regarding various optical power meter types, - ANSWERS-Enhanced power meters evolved for
roles where measurements need to be easily stored, recalled transmitted, and downloaded.
When measuring transmit and receive power with an optical power meter, - ANSWERS-The
meter's calibration must be traceable to the National Institute of Standards Technology (NIST).
When measuring end-to-end attenuation, - ANSWERS-The light source and optical power meter
must be referenced together prior to making any field measurement.
A light source - ANSWERS-Is crucial for accurately measuring optical fiber power and
attenuation.
When a laser light source is used to test fibers, - ANSWERS-A 2 kHz modulation provides a test
signal that allows the fiber under test to be detected by an optical fiber identifier.
Optical fiber identifiers - ANSWERS-Detect live traffic signals or modulated test signals on an
individual optical fiber.
,According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic cable is
represented by - ANSWERS-Double arrows within a small circle on a solid line.
The forward path signal in a traditional tree-and-branch architecture - ANSWERS-originates at
the headend and is transmitted downstream through coaxial trunk cable and trunk amplifier.
In a HFC network, - ANSWERS-Processing equipment in the headend converts the forward RF
signal to a light signal.
During aerial plant construction, - ANSWERS-The strand is tensioned so its sag profile matches
that of the overhead utility power lines.
With underground plant construction, - ANSWERS-The fiber-optic and coaxial cables are often
places underground with other utility lines to jointly share construction costs.
Standby power supplies - ANSWERS-continue providing an output voltage even during a utility
power outage by using a back up power source.
Centralized power configurations - ANSWERS-provide the advantage of increased reliability
through sharing of expensive backup generators and sophisticated monitoring equipment
among different power realms.
When transmitting broadband signals - ANSWERS-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 - ANSWERS-Have attenuator pads, equalizers, and duplex filters that control
and route the RF signals.
, Verifying plant reliability includes - ANSWERS-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? - ANSWERS-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? - ANSWERS-All types of leaks
must be fixed.
According to the FCC, the leakage log should contain which of the following? - ANSWERS-The
probable cause of the leakage.
Which of the following FCC required information must a cable system keep on file for two years?
- ANSWERS-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? - ANSWERS-112 uV/m.
If a large signal leak is found in the aerial plant, what is a good first step in locating the leak? -
ANSWERS-Drive around until an absolute peak is found.
Which of the following best describes demand maintenance procedures with regard to signal
leakage? - ANSWERS-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? - ANSWERS-The backward route from the ground block to
