Practice Test--Cable Technician Exam
1
Which transmission modes are used to send data between secondary hubs
and the headend? - -microwave, coax, and fiber
-After the RF signals are combined into one broadband signal and amplified
to the proper level, what must happen to the signal before it can be
transmitted over fiber-optic cable? - -The signal must be converted into light
frequencies
-In a coaxial-only plant, which of the following is true? - -Bridger filters are
used to block the signal from the feeder system
-In a hybrid fiber/coax system - -The trunk is fiber and the feeder and drop
systems are coax
-The primary function of line extenders is to extend signals farther down the
feeder line into the service area. As they do this, what do line extenders add
to cable signal? - -Noise and distortion
-Insertion loss - -The signal loss between the tap's input port and its output
port
-Which of the following receives power from a power distributing tap? - -
Network interface unit (NIU)
-A broadband signal whose voltage varies continually over time is? - -An
analog signal
-When a customer makes a phone call using a CBR network, which of the
following is true? - -the call is carried to the PSTN by the cable system
-Reverse path signals go from the customer premises to the headend. How
are reverse path signals sent to the headend - -reverse path signals travel to
the headend on sub-band RF carriers on the coaxial cable, which are
converted into digital light signals to travel on the fiber-optic cable
-Which of the following represents 1,000,000,000 cycles per second - -One
gigahertz
-The RF spectrum is made up of several bands of frequencies. What is the
name of the band located between 216 MHz and 300 MHz? - -Super-band
1
Which transmission modes are used to send data between secondary hubs
and the headend? - -microwave, coax, and fiber
-After the RF signals are combined into one broadband signal and amplified
to the proper level, what must happen to the signal before it can be
transmitted over fiber-optic cable? - -The signal must be converted into light
frequencies
-In a coaxial-only plant, which of the following is true? - -Bridger filters are
used to block the signal from the feeder system
-In a hybrid fiber/coax system - -The trunk is fiber and the feeder and drop
systems are coax
-The primary function of line extenders is to extend signals farther down the
feeder line into the service area. As they do this, what do line extenders add
to cable signal? - -Noise and distortion
-Insertion loss - -The signal loss between the tap's input port and its output
port
-Which of the following receives power from a power distributing tap? - -
Network interface unit (NIU)
-A broadband signal whose voltage varies continually over time is? - -An
analog signal
-When a customer makes a phone call using a CBR network, which of the
following is true? - -the call is carried to the PSTN by the cable system
-Reverse path signals go from the customer premises to the headend. How
are reverse path signals sent to the headend - -reverse path signals travel to
the headend on sub-band RF carriers on the coaxial cable, which are
converted into digital light signals to travel on the fiber-optic cable
-Which of the following represents 1,000,000,000 cycles per second - -One
gigahertz
-The RF spectrum is made up of several bands of frequencies. What is the
name of the band located between 216 MHz and 300 MHz? - -Super-band
