Delivering Cable Services 2023 with verified questions and answers

what major sources of television programming are available to broadband cable operators over-the-air, terrestrial microwave, direct cable feed, satellites, and local originating programming what are 3 main elements of a broadband cable network? the headend, the distribution network composed of coax and fiber, and the drop at the customers premise In a broadband network, what group is responsible for ensuring that the network remains in smooth running order by dispatching crews to carry out routine system testing, preventative, maintenance, and equipment testing/replacement? Network operations Center (NOC) In a broadband cable network, which administrative group maintains communication with installers construction/maintenance techs, and the customer service department? Dispatch In the United States, downstream broadband radio frequency (RF) signals traveling inside the coax cable start at what frequency? 54 MHz What is typically used to represent computer characters or words? ASCII code what analog TV impairments are no longer problems in digital video? Ghosting and Snow What happens as RF signals travel over cable? RF signal levels decrease over distance What type of traffic is transported over a broadband cable network's return path? Voice and data traffic along with communications via set-top boxes and other monitoring devices throughout the network. What are factors that determine a conductor's resistance? Conductor material, diameter, length, and temperature Which of the following organizations set of rules and regulations provides regulations for the safeguarding of persons during installation, operation, or maintenance of electrical supply and communication lines and associated equipment? The National Electrical Safety Code (NESC) Installing drop cable involves complying with routing restrictions such as avoiding aerial trespass. What is aerial trespass? Installing aerial drop cable across property lines. A cable caddy holds the cable reel, which helps the installer from damaging the cable when carrying it unreeling it. In most cases where should you place the cable caddy so that all lengths of cable can be routed and cut without having to move the cable caddy very far? Near the ground block. Whenever there is any possibility of pedestrian traffic near the cable stringing route, what should be done? Safety cones should be placed along the cable stringing route. Before climbing a pole, perform the OSHA specified pole test. What does this test ensure? That the poll will support the weight of the climber. Why are messenger drop wire clamps used in aerial drop applications? To preserve the signal-carrying capability of an aerial drop cable Which of the following is a factor when determining where to place a span clamp on a strand? the polls location relative to the customers premises. what is the minimum horizontal climbing space must be left to clear? 30 Inches Square What is the first step when attaching aerial drop cable to a house hook? To lift up the drop cable to the house hook to simulate the proper cable sag from the poll to the strand. When light strikes a medium ar an angle less than the critical angle, what happens to the light? It is reflected. In a fiber optic cable, What is the purpose of cladding? To guide the light down the fiber. You are planning a fiber optic network and want to amplify the signal so that you can send it further into the field. At which wavelength must the laser emit? 1,550 nm What should you use to pick up fiber optic pieces after you splice a cable? Tweezers You are doing an aerial installation of fiber optic cable. When you survey the installation path, you see the path runs near several short outbuildings and over a series of hedges. Which installation method should you use? The pull in method. How should you connect the OTDR to the fiber optic cable? With an optical mechanical splice As you prepare To set up the fiber optic network, you realize you need a coupler that will allow any of its ports to be used as either an input or output. Which coupler should you use? A reflective star coupler Which answer below best represents the Progression of fiber optic network architecture? Fiber to the feeder, fiber to the neighborhood, fiber to the curb, fiber to the home Why is the broadband cable Industry developing its own passive optical network standard instead of using standards already developed by the enter national telecommunication Union and the institute of electrical and electronics engineers? The industry has invested a lot of money and HFC networks, data over cable service interface specifications, and other systems and devices that are still currently being used, but they are not compatible with ITU and IEEE PON standards _______, is a short length of fiber that serves as an amplifier and fiber optic networks, allowing light signals to travel Further while retaining signal strength An erbium-doped fiber amplifier Over the air broadcast signals are acquired at the head and using: Yagi and log periodic antennas During the 1980s, what led to the expansion and cable system channel capacity? Fiber optic technology In the cable antenna relay service: Over the air signal is converted to frequency and the 12.7 to 13.2 GHz band One difference between frequency modulation and the amplitude modulated link Techniques in microwave signal transmission is that FM transmits a single Channel, and AML since blocks of broadband channels between headends and hubs A satellite transponder: Receives, amplifies, transmits, and re amplifies analog or compressed digital signals A Single beam TV receive only antenna: Has a parabolic shape that reflects The downlink signal from all locations on the dish surface onto a central focal point, which collects the reflections and provides maximum signal reception What device separates incoming signal and video and audio elements? Demodulators Inside the headend: Video signals are amplitude modulated, audio signals are frequency modulated,and color signals are amplitude and phase modulated Once signals are ready for transmission out of the head and, what is the last thing that needs to be done to the signals? Multiplexed What is or are the primary considerations when choosing a ground block location? Grounding and bonding requirements. What type of cable should be used in an underground service drop installation between the tap and the ground block? Non messenger flooded coaxial drop cable When planning the route for an underground drop cable, why should surface item such as vegetable or flower gardens be avoided? Someone would likely cut the drop in the future In most cases, coaxial drop cable is prepared for burial later by a 3rd party. When preparing the drop cable for in later burial, it is important to point out the location of the and buried drop to the customer. If the customer is not home, what is the best way to notify the customer about the drop? Tag the customer's door with a note indicating the temporary drop status After selecting an underground drop cable routes and locating the other underground utilities, you or a 3rd party must bury the underground drop cable. Which of the following methods is most common when directly burying underground drop cable and new construction areas? Cable plowing Long, continuous links of flexible polyethyle conduit can either be plowed or pulled into the ground with a cable clown. To people are required to plow in the conduit. One person drives the plow. What does the other person do? Feed the conduit into the cable chute Sometimes service drop cable needs to be routed under a driveway, sidewalk, front porch, or other surface obstacles. This can be done manually or with a boring machine. To bore the whole manually, how long should the length of the starting trench be? Long enough to accommodate the pipe or rod length used for the bore In order to close and secure the lid of of the pedestal or vault, it is important to properly Answer the service drop cable. How should service drop cable be routed and to the pedestal or vault in preparation for tap connection? Under and inside When connecting drop cable to a tap port, what does applying a light amount of grease to the tap port threads or using shrink tubing or sealing tape at the port do? Prevents moisture penetration When attaching cable to wood exteriors, the installer must attach the cable with a clip gun or with metal or plastic cable clips. how should the cable clips be spaced? At different distances between the clips What is the name of the group that establish standards for the television industry, enuring a single system would deliver consistent service across across the nation? The national television system committee What signal modulation technique too cable operators use to transport digital television signals through the cable network? Qam What is the major change in enhance definition TV that improves picture quality over standard definition TV ? The use of progressive scanning and EDTV What legislation act required all television stations to switch to a digital only broadcasting? The US deficit reduction act Why are digital terminal adapters or Dta's more cost effective than a full featured set top Box Digital adapters do not communicate RF upstream What are terrestrial transmission technology did the advanced television systems committee select? 8 level vestigial sideband Which system advanced television to high definition The multiple sub-nyquist sampling coding system AKA MUSE How do you set up boxes typically connect to the high definition television to provide the best picture quality? To provide the best HD picture, set up boxes typically connect to an HDTV via a HDMI cord What is an inexpensive device that is used by cable operators to provide digital TV services to all their customers? A digital terminal adapter or DTA Which technology enables cable operators to control access to certain services by encrypting the programming? conditional access What is one aspect that is common between digital video interface or DVI and high definition multimedia interface HDMI signaling? Both use transition minimized differential signaling or TDMS What could prevent a consumer electronic device from being able to record, play back, or display license digital content? Device copy protection that is incompatible with licensed copy protection embedded within the content. What can be said about digital interfaces when connecting consumer electronic devices? In most situations, the digital interfaces offer the simplest connection options, while providing the highest quality pictures in audio. What are the 2 basic rules to follow for making the best connection options between consumer electronic devices? Choose a connection with the least amount of signal processing and avoid signal conversions from analog to digital or digital-to-analog. What should the technician do after creating a cable 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 is the role of the AV receiver and a home theater system The AV receiver, along with surrounding receivers, offer a significant number of input and output interfaces, Most of which are used to provide an along and digital audio signals. List the order of preference when making analog connections to an analog TV. Component video, S video, composite video, and radio frequency What is the term for standardized analog audio signal output level from consumer electronic devices? Line level What is one advantage of using these Sony/philips digital interface or S/PDIF to connect audio hardware? S/PDIF produces a signal that is robust and less vulnerable to electrical interference. Why is it considered a best practice to use RCA cables provided by the cable operator and set of RCA cables provided by the customer? RCA cables provided by the customer are sometimes of questionable quality. The public switched telephone network or PTSN Uses pulse code modulation to perform what function? Convert an analog signal or human voice and to digital signals so that many calls can travel over the same wire In plain old telephone service or pots, the _______________is a pair of wires connecting the customer location to the telephone company local loop circuit What do the following statements is an accurate comparison between packet switching and circuit switching technologies? Packet switching uses the network only when words are spoken, while circuit switching uses the network consistently throughout the entire telephone conversation ____________, added to the media access control protocol in Docsis 1.1, wasd a first attempt away prioritizing IP traffic according to its application, giving priority to real time data packets such as streaming video over other types of packets such as email. Service flow PacketCable was designed to: Deliver real time Internet protocol or ip application such as voice and video services with the same level of quality as circuit switching technology did for the Plain old telephone service. The 3 networks included and packet cable 1.0 architecture are: Docsis hybrid Fiber/coax access network, the managed ip network, and the public switch telephone network Which of the following is an accurate description of the benefits of a packet cable managed Internet protocol network? Packet cable managed ip networks deliver higher voice quality than other voice over ip networks because they use a managed ip network and stead of the Internet to deliver packets to the public switched telephone network or PTSN. Which are the following statement is an accurate comparison between the signaling of traditional telephone call and a packet cable voice over ip call? Signaling of traditional telephone call is initiated when equipment in the central office senses a dial tone while signaling of packet cable voice call is initiated when the EMTA senses a dial tone. Customer premises devices that can be impacted by cable telephone service include Medical or device's home computer networks and alarm systems Which Tier of voice over ip service is computer to computer based? Tier III or Tertiary VoIP services such as Skype or computer to computer based. When were additional rules enacted by the FCC that required close captioning of much of the programming delivered via Internet protocol or ip 2012 What year did the emergency alert system replace the emergency broadcast system 1997 The cable communications policy act of 1984 mandates that cable operators must hold out reach programs such as job fairs, and turn sheds, mentoring, and interaction with schools and community groups. What other employment practices are mandated by this act? The cable operator must make their equal employment opportunity procedures available for public inspection on their websites. What is the role of a franchise authority? To provide the permissions necessary to allow a cable operator to use the public right of way within the franchise area, in order to access and connect customer premises. What is these justification for state issued franchises and place of local franchises? To promote competition. State as you'd franchises are typically much easier to renew and manage because there's only one main authority intead of many local franchises. How often must take broadband cable operator with a network of more than 1000 customers perform proof of performance testing? Twice a year What is the name of of the form that broadband cable operator must file each year with the FCC listing all measured leakage levels in their network? A form 320. What type of cellular phone service can suffer interference caused by leakage from broadband cable networks? Long term evolution or LTE What does the common alerting protocol or cap add to the emergency alert system? CAP Adds the ability to receive national EAS alerts from the Internet rather than exclusively from broadcast stations. What did the sec allow broadband cable operators to do after amending some roles and October 2012 to help operators cut down on service theft? Encryption of the limited basic tier What type of injuries are desperate and office employees at risk of suffering while on the job? Chronic back pain, eyestrain, and musculoskeletal disorders What are 3 common categories of safety procedures that proben cable operators practiced to safeguard the public? Protecting against lightning and power surges, following safe driving practices, and protecting customers and the general public against injury. Which articles of the NEC apply to broadband cable networks question Articles 820 and 830 What are the consequences for an employer that fails to comply with standards set by the OSHA Substantial fines to the employer Which osha standards below pertain to a cable operators field personal? Safety training, personal protective equipment, inspecting climbing equipment, testing utility Poles before climbing, and working with hazardous substances. One test performed to ensure that a Polish stable and without decay involves wrapping A-pole with a hammer starting near the ground light and continuing upwards around the Pole. What results indicate that the pool has decay pockets? A dull thud sound Which aspects of an extension ladders construction should an inspection include? The condition of the rungs, side rails, rope and pulley, latter feat, strand hooks, and the rung latch mechanism. What possible consequences could result from an osha investigation that proves an accident was due to lack of or improper training? Osha can find the employer up to $10000 for each employee who was improperly trained How often are the Nic and NESC updated? every 3 years What could be the safety consequences of leaving a raised extension ladder unintended, while working inside the customers premises? An unintended, raised extension ladder could attract a curious child who could play on, or climb the ladder, possibly leading to serious injury or death from falling.