consumer digital electronics
What angle can modern organic light-emitting diode (OLED) TVs be viewed at with no luminance degradation?
Up to 84 degrees off center.
What is the storage size required for a universal serial bus (USB) drive to hold roughly 500 hours of high-definition video and data?
1 terabyte (TB).
A set-top box (STB) diagnostics feature is able to quantify the return carrier (upstream) frequency and the signal level leaving the STB. The STB return path usually allocates carriers between what frequencies?
5 megahertz (MHz) and 20 MHz.
What is the role of the audio/video (A/V) receiver in the home theater system?
The A/V receiver processes and boosts analog and digital audio signals, processes analog and digital video signals, and provides central control and expanded input capability to the TV.
What must be done for a V-chip to intercept rating codes and allow/deny access to programming?
Both a personal identification number (PIN) and restricted content ratings must be set.
What happens if the same video-on-demand (VOD) movie session is ordered by three separate set-top box (STB) clients at three different times?
There is a separate unicast stream for each client, or three unicast streams.
What inexpensive device is used by broadband cable operators to provide digital television (DTV) services to all of their customers?
A digital terminal adapter (DTA).
When defined by the standards bodies, Internet protocol television (IPTV) was intended to have the same look and feel as TV delivered over what network medium?
A hybrid fiber/coax (HFC) network.
What is the general range of a remote control that uses a light-emitting diode (LED) that emits an infrared (IR) beam of light?
About 30 feet but is dependent on the strength of the transmitting LED.
Nyquist's theorem states that the audio sampling rate must be a multiple of the highest frequency to be sampled. What is the stated sampling rate?
At least two times the highest audio frequency.
Digital terminal adapters (DTA) support which of the following?
Basic service.
Why must the electronic program guide (EPG) be loaded into most digital set-top boxes (STB) memory before the box can be functional?
Because most STBs have a minimal or no operating system, the EPG is a middleware application that ties the STB firmware and hardware functions to the user.
What is the typical input/output operations per second (IOPS) of a solid state hard drive?
Between 3,000 and 40,000 IOPS.
Other than presenting the customer with options for viewing multiple channels, what does broadcast distribution of channels over a broadband cable network favor?
Channels intended for a specific and narrow group on customers.
What are the primary actions to take when troubleshooting a remote control that is not responding to the consumer electronics (CE) device?
Check the batteries; reprogram the remote control; replace the remote control.
What are the two basic rules to follow for making the best connection options between consumer electronic devices?
Choose the connection with the least amount of signal processing and avoid signal conversions from analog-to-digital or digital-to-analog.
Dolby decoding technology became more economical due to what?
Custom integrated circuit (IC) development.
After stereo audio, what was the major disruption to TV technology that followed decades of few notable disruptions.?
Digital TV (DTV).
What type of set-top box (STB) allows recording of video and audio onto an integrated hard drive within the STB?
Digital video recorder (DVR).
Which decoder is standard in most audio/video (A/V) receivers?
Dolby Digital.
Which High-Definition Multimedia Interface (HDMI) 2.1 feature dynamically changes the metadata for every scene or every frame to produce an image as close to the original image?
Dynamic high-dynamic range (HDR)
What terrestrial transmission technology did the Advanced Television Systems Committee (ATSC) select?
Eight-level vestigial sideband (8-VSB).
What was an original requirement for Internet protocol (IP)-formatted digital TV (DTV) delivery to be considered Internet protocol TV (IPTV)?
Exclusive delivery over a managed network.
If the customer wants more storage space to digitally record video through a digital video recorder (DVR), one method is to use an external hard drive connected to the DVR with which of the following connection protocols?
External serial advanced technology attachment (eSATA).
Which digital rights management (DRM) protocol currently only supports HTTP Live Streaming (HLS) and Common Media Application Format (CMAF) streaming protocols?
Fairplay.
What type of parental control guidelines are provided for online video games?
Games accessed online carry the notice "Online Interactions Not Rated by the Entertainment Software Rating Board (ESRB)" warning players about possible exposure to chat (text, audio, video) or other types of user-generated content outside of the ESRB rating assignment.
The Advanced Television Systems Committee (ATSC) standard A/52 specifies Dolby AC-3 to substantially reduce the amount of digital information for the compressed (or encoded) representation of the original audio signal. What aspect of the A/52 standard allows for proprietary, vendor-specific implementations?
Implementation of AC-3 codecs.
What can be said about digital interfaces when connecting consumer electronics (CE) devices?
In most situations, the digital interfaces offer the simplest connection options, while providing the highest quality picture and audio.
Which technology did the DOSSIS (Data Over Cable Service Interface Specification) Set-top Gateway (DSG) specification move to, after moving from the traditional out-of-band (OOB) transport, that preserves the essential nature of current OOB transport?
Internet protocol (IP)-based technology.
What does the Moving Picture Experts Group (MPEG) decoder do when analog signals pass through it?
It converts the analog signal from analog to digital.
What does a virtual machine (VM) do in "the cloud"?
It uses software instead of a physical computer to run programs and deploy applications.
What is one drawback of the pay-per-view (PPV) system?
Its inability to process orders quickly enough when the customer waits until the last minute to order an event.
What is the term for the standardized analog audio signal output level from consumer electronics (CE) devices?
Line level.
Which statement describes the internal process of a cathode ray tube (CRT)?
Magnetically directed electron beams, from electron guns, horizontally move back and forth, sending electron beams through a shadow mask.
Of the three layers of computing, which layer operates between the Network and Transport Layers of the Open Systems Interconnection (OSI) hybrid model?
Platform-as-a-service (PaaS).
What signal modulation technique do broadband cable operators use to transport digital television (DTV) signals through the cable network?
Quadrature amplitude modulation (QAM).
What should the technician do after creating a cabling table of preferred connection options that offer the highest quality signal?
Review the options with the customer, recognizing that signal flow is not the only criteria for determining how consumer electronic connections should be made.
What diagnostic information is checked to ensure video-on-demand (VOD) and other interactive services work properly on a set-top box (STB)?
STB Internet protocol (IP) address.
Multicast distribution is preferred for what type of TV content?
Scheduled programs or live events that begin at specific times with the potential for millions of simultaneous viewers.
Which type of digital flash memory card works in all host devices that support Secure Digital (SD) host devices?
Secure Digital (SD) card.
Some features found in today's audio/video (A/V) receivers are basic, or static features. Which feature group lists only static features?
Surround sound decoding; image rescaling; low-level harmonic distortion.
On most set-top boxes (STB), what happens when the power button is pushed?
The STB goes into standby mode and the front display turns off.
What flags programming, such as video-on-demand (VOD) and pay-per-view (PPV) so it can be recorded?
The broadcaster or service provider.
How does adaptive bit rate (ABR) technology improve the playback of streamed content on a client?
The client automatically adapts to the bit rate most appropriate for its display and the network conditions.
What is the major change in enhanced definition television (EDTV) that improves picture quality over standard definition television (SDTV)?
The use of progressive scanning in EDTV.
Which speaker characteristics are generally associated with the monopole speaker design?
They are more applicable to smaller rooms and provide sound in one direction.
What can be said about disruptive technologies?
With mainstream acceptance, what was once called disruptive is eventually deemed innovative.
What is necessary to use an analog television for viewing over-the-air (OTA) digital television (DTV) programming?
An external DTV tuner and decoder.
Which feature was first introduced in the High-Definition Multimedia Interface (HDMI) 1.4 specification and offers two-way communication between devices over a single HDMI connection?
Audio return channel (ARC)
What is a major disadvantage of organic light-emitting diode (OLED) TVs that quantum light-emitting diode (QLED) and light-emitting diode (LED) TVs do not experience?
Blue diodes within the TV screen degrade over time resulting in a noticeable picture degradation.
What is one aspect that is common between digital video interface (DVI) and High-Definition Multimedia Interface (HDMI) signaling?
Both use transition-minimized differential signaling (TMDS).
Of the four basic video properties, which property is the black level control?
Brightness.
How does using content delivery networks (CDN) to deliver streaming content from virtual multichannel video programming distributors (vMVPD) improve the viewing experience?
By shortening the distance between customers with their client devices and the servers that stream the content.
What signal security device was developed for set-top boxes (STB) that broadband cable operators use to authorize the viewing of subscribed cable services?
CableCARD.
Which Secure Digital (SD) speed class is best suited for storing and playing full-HD recordings and large high-definition files?
Class 10.
What video setting adjusts colors to appear the way the TV or movie producer intended them to appear?
Color saturation and tint.
What is the order of preference when making analog connections to an analog TV?
(1) Component video; (2) S-video; (3) composite video; and (4) radio frequency (RF).
What should a technician always do when assessing the customer's TV during an installation?
(1) Verify normal TV operation after the set-top box (STB) is provisioned; (2) Verify all digital tiers are working; (3) Verify all other components are working; (4) Make sure correct cords are used.
What is the maximum coverage range for a radio frequency (RF) remote control?
100 feet.
A technician is planning the installation of speakers in a home theater system and notices that the speaker impedance is 8 ohms and that the speaker wires are 12 gauge in size. What is the furthest distance the wires can run to connect the speakers?
120 feet.
What is the typical life span of a light-emitting diode (LED) bulb before it has to be replaced?
20,000 hours.
Which transmission scheme is used as the solution to protect critical video information such as average brightness and synchronizing pulses?
Amplitude modulation-vestigial sideband (AM-VSB)
Which statement best describes digital rights management (DRM)?
DRM is a use of technology and systems to protect copyright material and manage digital media.
Which liquid crystal on silicon (LCoS) technology has an extremely high video resolution of 35 megapixels (8192 x 4320 pixels)?
Direct-Drive Digital Image Light Amplifier (D-ILA).
In a 3D/object-based audio 5.1.4 setup, what does the "4" at the end of the audio channel setup mean?
Height information for the front and rear speakers.
What is the best recommendation for a customer wanting to purchase a projection screen for their light-emitting diode (LED) projector?
High-gain gray screen.
Of the following, which provides the most appropriate digital set-top box (STB) capabilities to allow customers to access video-on-demand (VOD), over-the-top (OTT) applications, and high definition television (HDTV), as well as record up to four shows while watching different digital channels at the same time?
Hybrid quadrature amplitude modulation (QAM)/Internet protocol (IP) STB with cloud digital video recorder (cDVR).
Which projector technology offers more than of 3,500 ANSI (American National Standards Institute) lumens?
Laser.
When Internet protocol (IP) hybrid set-top boxes (STB) are used to integrate Internet protocol TV (IPTV) into a broadband cable network, how much involvement does the operator have with virtual multichannel video programming distributors (vMVPD), streaming devices, and content listings?
Minimal.
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?
Polarized light.
Why is it recommended to place the set-top box (STB) in a bag when swapping or removing it from a customer's house?
Protects technician and company from an insect infestation.
What are the main sound quality advantages when using bi-wiring for connecting speakers?
Provides for a cleaner, more efficient transmission and a broader spectrum of sound.
Which cloud storage service provides a multi-tenant storage environment that is best suited for unstructured data?
Public cloud storage.
Which light-emitting diode (LED) technology uses artificial nanocrystals that enhance brightness and color performance within the liquid crystal display (LCD) display?
Quantum light-emitting diode (QLED).
What is one advantage of using the TOSLINK Sony/Philips Digital Interface (S/PDIF) to connect audio hardware?
TOSLINK S/PDIF produces a digital signal that is robust and less vulnerable to electrical interference.
What information about the sound wave must first be determined before the sampling analog-to-digital (A/D) process can begin?
The amplitude of the sound wave.
When should the code scan method be used to program a remote control?
When the code for a brand and/or model for the consumer electronics (CE) device to be controlled is unknown.
How many glass panels does an to liquid crystal display (LCD) projector?
Three glass panels for each color: red, blue and green.
Which type of video-on-demand (VOD) refers to a service where users can buy a particular piece of VOD content on a pay-per-view (PPV) basis?
Transactional video-on-demand (TVOD)
What sets the high definition television (UHD) standard apart from the 4K standard?
UHD is a consumer display and broadcast standard.
