NCTI Service Technician Exam Questions
And Answers
What are three principle characteristics that define an AC
waveform? -
correct answer ✅The three principle characteristics that define an
AC waveform are: (1) frequency; (2) wavelength; and (3) amplitude.
What is one of the basic principles of resistance reflected in the
familiar practices of grounding and bonding? -
correct answer ✅Grounding and bonding practices reflect the
basic principle that electricity always follows the path of least
resistance.
What comprises the impedance of a coaxial cable or a device
(connector, passive, etc.)? -
correct answer ✅The impedance comprises the combined effects
of a coaxial cable's or a device's resistance, inductance, and
capacitance.
What is a high pass filter? -
correct answer ✅A high-pass filter is a type of bandpass filter that
passes all frequencies above a specific frequency (e.g., 50 MHz),
and eliminates common path distortions, impulse noise in the
return spectrum, and any other frequencies that fall below that
specific frequency.
,NCTI Service Technician Exam Questions
And Answers
What are the differing forward-path transmission bandwidths for
traditional tree-and-branch and HFC architectures? -
correct answer ✅The feeder system in a traditional tree-and-
branch architecture supplies the forward signal up to a 50-550 MHz
pass band, and the distribution system in an HFC network transmits
the forward signal up to a 50-1,000 MHz pass band.
Where does the feeder system forward path start and end in a tree-
and-branch design? -
correct answer ✅A tree-and-branch feeder system forward path
starts at the output of the bridger amplifier module in the
trunk/bridger amplifier station and ends at the tap port of an RF
tap.
Where does the distribution system forward path begin and end in
an HFC design? -
correct answer ✅An HFC distribution system forward path begins
at the output of an RF amplifier located in the optical node and
ends at the tap port of an RF tap.
What is the purpose of a coaxial express cable in an HFC
distribution system? -
correct answer ✅A coaxial express cable allows a particular optical
node to reach farther out in the distribution system.
,NCTI Service Technician Exam Questions
And Answers
How is underground cable manufactured? -
correct answer ✅Underground cable is manufactured with a
protective outer jacket covering the aluminum sheath and flooding
compound between the jacket and the sheath.
How do frequency and cable size affect the attenuation of a
broadband signal? -
correct answer ✅The attenuation of a broadband signal increases
with higher frequencies and decreases with larger cable size.
What is the role of splitters and directional couplers in the forward
and return paths? -
correct answer ✅Splitters and directional couplers divide and
route the forward RF signal transmission throughout the
distribution system, and combine return-path signals arriving from
separate feeder runs.
How is AC power transmitted in an RF tap? -
correct answer ✅AC power passes bidirectionally through the tap,
but is prevented from passing through to the tap ports except by
design in power-distributing taps.
, NCTI Service Technician Exam Questions
And Answers
What is the distinction between a line extender amplifier and a
distribution amplifier? -
correct answer ✅The distinction is a line extender, which has a
single output port and a distribution amplifier, or minibridger,
which has multiple output ports (typically three ports; a through-
port and two auxiliary output ports).
What are five important components of an amplifier station? -
correct answer ✅Five important amplifier station components are:
(1) input and output diplex filters that separate and combine the
forward and return paths within the amplifier; (2) forward and
return plug-in pads and equalizers for controlling the input signal
levels; (3) an RF amplifier module; (4) an integrated or stand-alone
DC power supply with DC current fusing; and (5) AC power direction
control.
What factors define the extent of a power realm? -
correct answer ✅Cable resistance, combined amplifier load
requirements, individual amplifier voltage minimums, and limits on
AC current define the extent of power realms.
What are the three main components of a typical standby power
supply? -
correct answer ✅The three main components of a standby power
And Answers
What are three principle characteristics that define an AC
waveform? -
correct answer ✅The three principle characteristics that define an
AC waveform are: (1) frequency; (2) wavelength; and (3) amplitude.
What is one of the basic principles of resistance reflected in the
familiar practices of grounding and bonding? -
correct answer ✅Grounding and bonding practices reflect the
basic principle that electricity always follows the path of least
resistance.
What comprises the impedance of a coaxial cable or a device
(connector, passive, etc.)? -
correct answer ✅The impedance comprises the combined effects
of a coaxial cable's or a device's resistance, inductance, and
capacitance.
What is a high pass filter? -
correct answer ✅A high-pass filter is a type of bandpass filter that
passes all frequencies above a specific frequency (e.g., 50 MHz),
and eliminates common path distortions, impulse noise in the
return spectrum, and any other frequencies that fall below that
specific frequency.
,NCTI Service Technician Exam Questions
And Answers
What are the differing forward-path transmission bandwidths for
traditional tree-and-branch and HFC architectures? -
correct answer ✅The feeder system in a traditional tree-and-
branch architecture supplies the forward signal up to a 50-550 MHz
pass band, and the distribution system in an HFC network transmits
the forward signal up to a 50-1,000 MHz pass band.
Where does the feeder system forward path start and end in a tree-
and-branch design? -
correct answer ✅A tree-and-branch feeder system forward path
starts at the output of the bridger amplifier module in the
trunk/bridger amplifier station and ends at the tap port of an RF
tap.
Where does the distribution system forward path begin and end in
an HFC design? -
correct answer ✅An HFC distribution system forward path begins
at the output of an RF amplifier located in the optical node and
ends at the tap port of an RF tap.
What is the purpose of a coaxial express cable in an HFC
distribution system? -
correct answer ✅A coaxial express cable allows a particular optical
node to reach farther out in the distribution system.
,NCTI Service Technician Exam Questions
And Answers
How is underground cable manufactured? -
correct answer ✅Underground cable is manufactured with a
protective outer jacket covering the aluminum sheath and flooding
compound between the jacket and the sheath.
How do frequency and cable size affect the attenuation of a
broadband signal? -
correct answer ✅The attenuation of a broadband signal increases
with higher frequencies and decreases with larger cable size.
What is the role of splitters and directional couplers in the forward
and return paths? -
correct answer ✅Splitters and directional couplers divide and
route the forward RF signal transmission throughout the
distribution system, and combine return-path signals arriving from
separate feeder runs.
How is AC power transmitted in an RF tap? -
correct answer ✅AC power passes bidirectionally through the tap,
but is prevented from passing through to the tap ports except by
design in power-distributing taps.
, NCTI Service Technician Exam Questions
And Answers
What is the distinction between a line extender amplifier and a
distribution amplifier? -
correct answer ✅The distinction is a line extender, which has a
single output port and a distribution amplifier, or minibridger,
which has multiple output ports (typically three ports; a through-
port and two auxiliary output ports).
What are five important components of an amplifier station? -
correct answer ✅Five important amplifier station components are:
(1) input and output diplex filters that separate and combine the
forward and return paths within the amplifier; (2) forward and
return plug-in pads and equalizers for controlling the input signal
levels; (3) an RF amplifier module; (4) an integrated or stand-alone
DC power supply with DC current fusing; and (5) AC power direction
control.
What factors define the extent of a power realm? -
correct answer ✅Cable resistance, combined amplifier load
requirements, individual amplifier voltage minimums, and limits on
AC current define the extent of power realms.
What are the three main components of a typical standby power
supply? -
correct answer ✅The three main components of a standby power
