NCTI Troubleshooting
Advanced Services
100% SOLUTIONS
REVISED 2023//2024
To resolve where the source of a digital video problem lies, a technician uses -
ANSWER C) The divide-and-conquer method for troubleshooting, which can begin with
measurements on customer premise equipment that offer ...
NCTI Troubleshooting
Advanced Services
100% SOLUTIONS
REVISED 2023//2024
To resolve where the source of a digital video problem lies, a technician uses -
ANSWER C) The divide-and-conquer method for troubleshooting, which can begin with
measurements on customer premise equipment that offer easier access for testing.
In addition to being accurate and detailed, a successful troubleshooter knows that -
ANSWER B) A critical step in troubleshooting is verifying the signal levels and signal
quality at the tap to establish the baseline performance for the installation.
In troubleshooting a digital-to-analog converter, try the suspect converter in a different,
working outlet to - ANSWER B) Determine if the original outlet needs to be repaired.
Digital set-top box diagnostics can aid a technician with which of the following
parameters while troubleshooting? - ANSWER A) Service authorization, received signal
quality, and return path operations.
If a digital video service customer reports that the set-top box does not respond to the
remote control, what is the quickest and easiest thing to do first? - ANSWER C) Check
the line of sight between the remote control and the set-top box.
When a communications issue is suspected in an HDMI device, the technician should -
ANSWER A) Try an alternate HDMI port on the device, if one is available.
, When equipment is connected via the component video output, - ANSWER C) Format
settings for vertical resolution, scan method, and aspect ratio may need to be adjusted
manually.
To eliminate possible causes of audio issues, a technician can - ANSWER A) Check the
set-top box (STB) and the television set to ensure audio connections have been made
correctly.
Which of the following are among the reasons why a customer may not be able to order
video-on-demand (VOD)? - ANSWER C) VOD or pay-per-view (PPV) credit limits might
have been reached, indicating that purchases have not been collected due to a return
path problem.
If a digital video service customer calls with an issue related to not being able to delete
a recorded program, it could be caused by - ANSWER C) The program is being played
on a second set-top box in a whole house or multi-room digital video recording (DVR)
configuration.
Quality of service (QoS), as measured by availability, describes the - ANSWER B) Ratio
of time that a system or service is available for use to total time.
To determine if objective network data measured by quality of service (QoS) parameters
match a customer's overall satisfaction level, - ANSWER B) Cable operators use a
quality of experience (QoE) measurement based on mean opinion score (MOS) and
perceptual quality metrics (PQM).
Perceptual quality metrics (PQM) provide cable operators with - ANSWER B) An
objective measurement of human visual perception based on a statistical analysis of
quality of service (QoS) measurements and MPEG encoding data.
Chrominance subsampling, which usually takes place in the studio environment, is the
process of - ANSWER D) Compressing a raw digital video file so that each pixel retains
its own luminance information, but the chrominance is averaged from the original pixel
pairs to a 4:2:2 profile.
In intraframe coding, data for redundant pixel arrays are - ANSWER B) Transmitted
once with data that tells the decoder where, on the single frame, the array is displayed.
Interframe coding, a form of temporal compression, uses - ANSWER A) An intra-coded
frame to compare picture information between consecutive frames, using motion
vectors, which results in predicted frames (P-frames).
Rate shaping, a possible point of failure for digital video in the headend, describes -
ANSWER B) The process of managing the data rates of multiplexed individual channels
on a quadrature amplitude modulation (QAM) carrier.
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