Fiber Optic and Broadband Cable Technician (REP2) Exam Study Guide

REP1- REP 2 EXAM QUESTIONS q q q q q




When light strikes a medium at an angle less than the critical angle, what happens to the light? - It
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q is reflectedq




In a fiber optic cable, what is the purpose of the cladding? -q
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To guideqthe light down theqfiber q q q q q




You are planning a fiber optic network and want to amplify the signal so you can sendqit farther
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into the field. At which wavelength must the laser emit? -
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1550 nm q




It is important to follow safety procedures when installingqand handling fiber optic cable. What
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should you useqto pickqup fiber pieces after you splice a cable? -
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Tweezers

You are doing an aerial installation of fiber optic cable. When you survey the installation path,
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you see that theqpath runs near several short outbuildings and over a series of hedges. Which in
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stallation method should you use? -
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The pull in method q q q




Poor performance in the fiber optic network leads you to believe that there is a fault in the fiber
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opticqcable and youqwant to testqa section of the network with an optical time domain reflectom
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eter OTDR, How should you connect the OTDR to the fiber optic cable? -
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With an optical mechanical splice q q q q




As you prepare to set up the fiber optic network, you realize you need a coupler that will allow
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any of its ports to be used as either input or output. Which coupler should you choose? -
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A reflective star coupler q q q




As cable companies have expanded their use of fiber optic cable, they have also brought it clos
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er to the customer premises, increasing the bandwidth available to customers. Which answer b
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elow represents theqprogression of fiber optic network architecture? -
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Fiber to the feeder *FTTF* - Fiber to theqneighborhood *FTTN* - q q q q q q q q q q


Fiber to the curbq*FTTC* - and Fiber to the home *FTTH*
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Why is the broadband cable industry developingqits own passive optical network (PON) standa
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rd instead of usingqstandards already developed by theqInternational Telecommunication Unio
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n (ITU) and the Institute of Electrical and Electronics Engineers (IEEE) -
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The industry has invested a lot of money in HFC Networks, Data Over Cable ServiceqIn
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terfaceqSpecification, and other systems and devices that are still currently being used, but they
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are not compatible with ITU and IEEE PON standards.
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What serves as an amplifier in fiber optic networks, allowingqlight signals to travel farther whil e
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retainingqsignal strength? -
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EDFA, Anqerbium-doped fiber amplifier q q q




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, What is the name of the group that established standards for the television industry, ensuring a
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single system would deliver consistent service across the nation? -
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The National Television System Committee (NTSC) q q q q q




What signal modulation technique do cable operators use to transport digital television signals
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through the cable network? -
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QAM Quadrature Amplitude Modulation q q q




What is the major change in enhanced definition TV (EDTV) that improves picture quality ove r
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SDTV -
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The use of progressive scanning in EDTV q q q q q q




What legislation required all television stations to switch to digital only broadcasting? -
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The US Deficit Reduction Act
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Why are digital terminal adapters more cost effective than a full featured set top box? -
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DTA's do not require RF upstream
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What terrestrial transmission technology did the Advanced Television Systems Committee (A
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TSC) select? -
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Eight level vestigial sideband (8-VSB) q q q q




Which system advanced television to high definition? -
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MUSE Theqmultiple sub-Nyquist sampling encoding system q q q q q




How do set top boxes typically connect to high definition televisions to provide the best picture
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quality? -
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HDMI

What inexpensive device is used by cable operators to provide digital tv services to all of their
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customers? -
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A DTA q




Which technology enables cable operators to control access to services by encrypting the progr
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amming? -
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Conditional Acess (CA) q q




What major sources of television programming are available to broadband cable operators? -
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Over the air, terrestrial microwave, direct cable feed, and local origination programmin
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g

What are the three main elements of a broadband cable network? -
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The headend, the distribution network composed of coaxial cable and/or fiber optical ca
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ble, and the drop at the customer premises.
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In a broadband cable network, what group is responsibleqfor ensuring that theqnetwork remains
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qin smooth running order by dispatching crews to carry out routingqsystem testing, preventative
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qmaintenance, and equipment servicing and replacement? - q q q q q q


Network operations center (NOC) q q q




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