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Progression: Maintenance Tech I - II Conventional Revised Questions and Answers / Sure A +, Exams of Information Technology

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 headend and is transmitted downstream through coaxial trunk cable and trunk amplifiers. In an HFC network, - ✔✔Processing equipment in the headend converts the forward RF signal to a light signal.

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2024/2025

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Progression: Maintenance Tech I - II
Conventional Revised Questions and
Answers / Sure A +
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 headend
and is transmitted downstream through coaxial trunk cable and trunk amplifiers.
In an HFC network, - ✔✔Processing equipment in the headend converts the forward RF signal to a
light signal.
During aerial plant construction, - ✔✔The strand is tensioned so its sag profile matches that of the
overhead utility power lines.
With underground plant construction, - ✔✔The fiber-optic and coaxial cables are often placed
underground with other utility lines to jointly share construction costs.
Standby power supplies - ✔✔Continue providing an output voltage even during a utility power
outage by using a backup power source.
Centralized power configurations - ✔✔Provide the advantage of increased reliability through sharing
of expensive backup generators and sophisticated monitoring equipment among different power
realms.
When transmitting broadband signals - 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 - ✔✔Have attenuator pads, equalizers, and diplex filters that control and route
the RF signals.
Verifying plant reliability includes - ✔✔Frequency response sweeping, which is adjusting RF amplifier
circuits to amplify all frequencies in the bandpass spectrum as equally as possible
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Progression: Maintenance Tech I - II

Conventional Revised Questions and

Answers / Sure A +

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 headend and is transmitted downstream through coaxial trunk cable and trunk amplifiers. In an HFC network, - ✔✔Processing equipment in the headend converts the forward RF signal to a light signal. During aerial plant construction, - ✔✔The strand is tensioned so its sag profile matches that of the overhead utility power lines. With underground plant construction, - ✔✔The fiber-optic and coaxial cables are often placed underground with other utility lines to jointly share construction costs. Standby power supplies - ✔✔Continue providing an output voltage even during a utility power outage by using a backup power source. Centralized power configurations - ✔✔Provide the advantage of increased reliability through sharing of expensive backup generators and sophisticated monitoring equipment among different power realms. When transmitting broadband signals - ✔✔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 - ✔✔Have attenuator pads, equalizers, and diplex filters that control and route the RF signals. Verifying plant reliability includes - ✔✔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? - ✔✔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? - ✔✔All types of leaks must be fixed. According to the FCC, the leakage log should contain which of the following? - ✔✔The probable cause of the leakage. Which of the following FCC required information must a cable system keep on file for two years? - ✔✔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? - ✔✔112 uV/m. If a large signal leak is found in the aerial plant, what is a good first step in locating the leak? - ✔✔Drive around until an absolute peak is found. Which of the following best describes demand maintenance procedures with regard to signal leakage? - ✔✔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? - ✔✔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? - ✔✔Typical sources include aircraft communication signals and ham, mobile, and government radio broadcasts.

Across 6 MHz, what is the maximum in-channel frequency response (ICFR) defined in the Data Over Cable Service Interface Specification (DOCSIS)? - ✔✔3.0 dB peak-to-valley (P/V). When sweeping the upstream return path in a hybrid fiber coax (HFC) network, where are the upstream levels and sweep responses measured? - ✔✔The headend. Even though the downstream sweep test pulses are intended to fit in the narrow frequency band between channels, what parameter can cause interference if set too high? - ✔✔Sweep test pulse amplitude. What does a normalized reference trace from a fiber-node test point eliminate from the sweep process? - ✔✔Slope and response variations of the headend and optical transport. How must a directional test point be installed in an amplifier to enable insertion of upstream sweep pulses and view the downstream sweep? - ✔✔In a path common to the downstream and upstream. What could cause low-frequency roll-off of the downstream spectrum discovered when sweeping an amplifier? - ✔✔A loose seizure screw in the downstream path. When standing waves are displayed in the sweep response, what does the frequency separation between response peaks indicate? - ✔✔The approximate distance from the test point to the fault. What do normalized reference traces taken at a fiber-node test point establish? - ✔✔Baseline sweep responses that are used to balance and sweep all the amplifiers serviced by that fiber-node. Why is the main downstream output/upstream input port of a distribution amplifier typically the first to be swept in the downstream direction? - ✔✔To select equalizers and set the output amplitude levels.