NCTI - Installer Book (All Correct 100%)

Which of the following will strengthen signals as they move farther away from the headend through the trunk express system? correct answers B) Distribution amplifiers. Which of the following describes a carrier wave? correct answers B) A wave with a much higher frequency than the input signal. Which of the following describes modulation? correct answers B) The reshaping of a carrier wave to include information contained by an input signal. Which of the following is the symbol for power? correct answers W = watts Which of the following describes the process of measuring an analog signal at a specific interval? correct answers Sampling Which of the following is true about the base 10 system? correct answers B) Digits 0 through 9 are used. Which of the following best describes post bit-error-rate (BER)? correct answers A) A measurement of all bit error after forward error correction has been applied. Which of the following compression rates will enable six digital programs to be transmitted rather than one analog channel in a 6 MHz bandwidth? correct answers 6:1 At what modulation error ratio (MER) should a 256-quadrature amplitude modulation (QAM) signal operate? correct answers 32db or greater On the return path, signals from many sources must be sent on the same cable. What is the name of the technique that allows the signals to be sent without losing data integrity? correct answers B) Time division multiple access (TDMA). In a coaxial cable, what is the purpose of the shielding? correct answers C) Prevents ingress and egress. Which of the following describes attenuation? correct answers A reduction in signal strength through a cable system. Which of the following is a feature of multimode fiber? correct answers B) It is easier to handle and terminate than single-mode fiber. Which of the following describes the structure of fiber-optic cable? correct answers B) Drop fiber cables may use buffer tubes containing steel wire. Which of the following is true about CAT-1 cabling? correct answers C) It is typically used in voice applications.