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NCTI Consumer Digital Electronics Question and answers rated 2023
NCTI Consumer Digital Electronics Question and answers rated 2023
[Meer zien]Voorbeeld 2 van de 9 pagina's
Voorbeeld 2 van de 9 pagina's
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Voorbeeld van de inhoud
NCTI Consumer Digital ElectronicsWhat is the name of the group that established the initial technical standards for the
television industry, ensuring a single system would deliver consistent service across the
nation? - correct answer The National Television System Committee (NTSC).
What signal modulation technique do cable operators use to transport digital television
signals through the cable network? - correct answer Quadrature amplitude modulation
(QAM).
What is the major change in enhanced definition TV (EDTV) that improved picture
quality over standard definition TV (SDTV)? - correct answer The use of progressive
scanning mode in EDTV.
What legislation required all television stations switch to digital-only broadcasting? -
correct answer The U.S. Deficit Reduction Act.
Why are digital terminal adapters (DTA) more cost effective than a full-featured set-top
box (STB)? - correct answer DTAs do not communicate RF upstream..
What terrestrial transmission technology did the Advanced Television Systems
Committee (ATSC) select?. - correct answer 8-level vestigial sideband (8-VSB)
Which system advanced television to high definition (HD)? - correct answer The
multiple sub-Nyquist sampling encoding (MUSE) system.
How do set-top boxes (STB) typically connect to high definition televisions (HDTV) to
provide the best picture quality? - correct answer To provide the best HD picture,
STBs typically connect to HDTVs via a High-Definition Multimedia Interface (HDMI).
What inexpensive device is used by cable operators to provide digital TV (DTV)
services to all of their customers? - correct answer A digital terminal adapter (DTA).
Which technology enables cable operators to control access to services by encrypting
the programming? - correct answer Conditional access (CA).
Which statement below is correct in describing the internal process of a cathode ray
tube (CRT)? - correct answer Magnetically directed electron beams, from electron
guns, horizontally move back and forth, sending electron beams through a shadow
mask.
Which type of TV technology had to overcome early disadvantages such as weak
contrast, a lag or trail effect where fast-moving images appear to "smear" and screen
door effect where viewers see a visible pixel structure at close range? - correct answer
Liquid crystal display (LCD)
, The liquid crystal in liquid crystal display (LCD) technology is suspended between two
glass plates and the crystals are normally in a twisted configuration. What type of light
follows the orientation of the crystals, and is allowed to pass through? - correct answer
Polarized Light.
Projection technology enables larger displays than those of flat panel or direct view TV
sets. With rear-projection TV sets, what does the depth of the TV set depend on? -
correct answer The size of the screen
A customer is interested in purchasing a projection display and asks how DLP
compares to other technologies. How does DLP technology compare to liquid crystal
display (LCD) technology and related technologies, such as liquid crystal on silicon
(LCoS)? - correct answer DLP images are brighter than those formed from LCD and
LCoS technologies.
A customer is interested in purchasing a video projector and asks about the different
video display technologies. Which video display technology has strength that include
high color saturation and color accuracy? - correct answer Liquid crystal display (LCD)
While much time and attention can be spent choosing a video projector technology,
choosing the correct screen should play an equal role in the home theater experience.
Viewing angle and gain are key parameters when choosing a screen. How does gain
relate to viewing angle? - correct answer The higher the gain, the lower the viewing
angle.
What features of organic light emitting diode (OLED) display technology, make it an
attractive alternative to other television technologies? - correct answer Color,
brightness, wide viewing angle, durability, a thin light profile, and low energy
consumption make OLED technology an attractive alternative to other television
technologies.
What is added to a rear-projection cathode ray tube (CRT) display in order to support a
16:9 aspect ratio, and become high definition TV (HDTV)-ready? - correct answer A
digital-to-analog (D/A) converter is added prior to the CRT's electron gun stage.
What are some commonalities of all projector displays? - correct answer Lamp life,
brightness, lens type and variability, and connectivity.
What common device normally used by an installer during the installation of an
additional TV outlet, is found inside the VCR and is part of the A/B switch? - correct
answer Two-way splitter.
VCR+ was originally designed to work with videocassette recorders (VCR), but newer
recording devices including personal video recorders (PVR) and digital video recorders
(DVR), can also have VCR+ functionality. What VCR+ functionality prompted the
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