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Jeopardy 2016 Garza > NCT 4 16 > Flashcards

NCT 4 16 Flashcards

1
Q

A measure of an amplifier’s output level to the level of distortion it produces.

A

Output Capability

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2
Q

used to set the amplifier’s output tilt

A

Interstage Equalizer

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3
Q

The deviation in response at the output of an amplifier or passive device when compared to the response at its input

A

Signatures:

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4
Q

used to correct for a frequency response problem seen at the output of the amplifier station where installed

A

Mop-up

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5
Q

A circuit, usually within a forward amplifier module, which monitors temperature changes and causes an increase or decrease in its attenuation (and sometimes tilt as well) in an attempt to hold the amplifier’s output constant with ambient temperature changes

A

Thermal Level Control

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6
Q

To energize or power the equipment (nodes, amplifiers, and other active devices in the RF portion of the network

A

Activation

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7
Q

Refers to the percentage of optical modulation, per channel, driving a laser transmitter

A

Optical Modulation Index (OMI)

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8
Q

This device produces a “light” on which the RF signals from the return path are modulated

A

The Laser

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9
Q

Device used to convert an analog signal to a digital signal

A

Digitizer

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10
Q

The unwanted sum of and/or difference in frequencies resulting from the heterodyning (mixing) of two or more signals

A

Beat

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11
Q

caused in one channel by the carrier from another transmitter operating on the same channel

A

Co-Channel Interference

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12
Q

Outline or multiple images of the primary TV picture offset to either side.

A

Ghosts

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13
Q

characterized by a significant rise in the noise floor in the return portion of the spectrum

A

Common Path Distortion

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14
Q

A chemical change caused by a reaction to oxygen, such as rust

A

Oxidation:

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15
Q

A component frequency of the signal that is an integer multiple of the fundamental frequency

A

Harmonics

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16
Q

A theoretical temperature equivalent to the absolute absence of heat and equal to -273.15 degrees C, -459.67 degrees F, or 0 degrees Kelvin.

A

Absolute Zero

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17
Q

Noise added to the response due to a lack of, or improper termination.

A

Termination Noise

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18
Q

Amplifier circuit paths that allow AC voltage to be directed onto specific distribution cables

A

Power Passing Chokes

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19
Q

an overload effect noted through digital signal processing equipment.

A

Spectral Re-growth

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20
Q

FCC

A

Federal Communications Commission

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21
Q

When and where was the was a problem caused in leakage to make FCC create a standard for leakage

A

In 1976, signal leaking from a cable system in Harrisburg, PA, interfered with air traffic communication

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22
Q

Cumulative Leakage Index

A

A figure of merit derived mathematically from the number and severity of signal leaks in a cable system

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23
Q

Environmental Factors That Affect Signal Leakage

A

static electricity, temperature ,lightning, solar emmisions, and UV rays

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24
Q

sun transit (sun outage), and happens twice a year in

A

March and October

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25
Q

LTE stands for

A

Long-Term Evolution

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26
Q

LTE operates in the

A

700 MHz to 800 MHz frequency range

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27
Q

cable operator arrives at a cumulative (average-weighted) score. The pass/fail score is

A

64

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28
Q

The FCC requires that cable operators file an annual CLI calculation, using a Form 320. The completed Forms 320 are kept in

A

your system’s public file.

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29
Q

During a flyover, an airplane flies over the system, measuring any detectable leaks. This is done at an altitude

A

1500 feet

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30
Q

Subatomic particles found in atoms that balance out the positive charge of a proton (within the nucleus) with their negative charge

A

Electrons

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31
Q

Substance that allows heat or electricity to pass along or through it, for example, cables, wires, metal surfaces, and water

A

Conductor

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32
Q

The device that uses the electricity. It is any device that draws current

A

Load

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33
Q

electromotive force (or pressure) that causes electrons to flow in a circuit

A

Voltage

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34
Q

opposition a material offers to the flow of current

A

Resistance

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35
Q

The amount of electrons that pass a given point in the conductor in one second

A

Coulomb

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36
Q

The difference in voltage between one point and another

A

Potential Difference

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37
Q

defined as one complete sine wave.

A

cycle

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38
Q

the physical length of one cycle of the voltage waveform.

A

Wavelength

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39
Q

the amount of time it takes an AC waveform to complete one cycle

A

Period

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40
Q

the position of the amplitude value as related to time.

A

Phase

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41
Q

peak value of an AC waveform

A

Amplitude

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42
Q

Span Current × Span Resistance =

A

Voltage Drop

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43
Q

The amount of energy available to move a certain number of electrons from one point to another in an electrical circuit.

A

Voltage

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44
Q

stop working (and descend pole or ladder) for 15 minutes when you see lightning; resume work if no lightning is observed, what is this rule

A

15 minute wait rule

45
Q

There are three methods for testing batteries:

A

Battery load test
Battery voltage test
Battery conductance test

46
Q

Always wear______ when working with batteries

A

acid-resistant hand protection and apron, safety glasses, and face shields

47
Q

Compares the speed of light through a material to the speed of light through a vacuum

A

Index of Refraction

48
Q

occurs when light strikes an interface at an angle of incidence (with respect to the normal) greater than the critical angle, allowing it to be continually reflected from the interface between two materials with different refractive indices.

A

Total Internal Reflection

49
Q

In the 1960s, _____ work with lasers gave us the ability to add information to light waves.

A

Theodore Maiman’s

50
Q

your system adds or changes information on the design map. The corrected map is called an

A

As-Built Map

51
Q

anchors are designed for use in soft soil where screw anchors are less effective

A

Never Creep Anchors

52
Q

designed to expand in holes bored in rock or concrete

A

Rock or concrete anchors

53
Q

A cable positioner is pushed in front of a lasher by a cable block pusher to uniformly position multiple cables that are being lashed

A

magic box

54
Q

This device is used to push equipment ahead of a pulled lasher

A

Cable block pusher, also known as a shotgun or a shuttle.

55
Q

8-16 bit Hexidecimal numbers seperated by colons

A

IPV6

56
Q

Additional bits (symbols) added to data to detect + correct errrors

A

FEC

57
Q

the number of errored bits compared to the total number of bits

A

BER

58
Q

an overall digital signal quality measurement

A

MER

59
Q

the standard for HSI in a CATV system

A

DOCSIS

60
Q

According to the book, fwd levels could be as high as

A

50dBmv

61
Q

in watchtower jobs, TSI, outages, are associated to what network element

A

Node

62
Q

List two items that TSI checks

A

911 check and % of commercial customers

63
Q

what is the importance of suspending a job when you will temporary stop working on it

A

time accountabliity

64
Q

combining multiple QAM to form a single “wide band channel”

A

channel bonding

65
Q

a set of rules for how devices on a network exchange information

A

Protocol

66
Q

DOCSIS 3.0 two new advanatage

A

IPV6 and channel bonding

67
Q

what would be a likely reason for having excessive distortions at the output of an amp

A

overdriving, high input hybrid to amp

68
Q

what would be a likely reason for having a low CNR at the input of and amp

A

starving, low inputs into hybrid to amp

69
Q

a card that can detect if light is on a fiber

A

photosensitive card

70
Q

when the amp gain = the losses before the amp

A

unity gain

71
Q

what 2 factors impact a cables DC Loop resistance

A

Length and diameter

72
Q

In analog NTSC tv analog channel, how man MHZ away from the video carrirer is the color and audio

A

3.58 is the color, and 4.5 mhz is the audio

73
Q

when information is superimposed onto a carrier

A

modulation

74
Q

audio carrier is how many db lower than the video carrirer

A

10-17db

75
Q

A distortion caused from oxidation between 2 dissimilar metals

A

common path distortion

76
Q

a mode in flux used to identify multiple DOCSIS devices that share one common problem

A

signature

77
Q

the most effective method for measuring and correcting frequency response problems

A

sweep

78
Q

whats the most accurate way to test PS batteries

A

under load

79
Q

a graphic representation of the 4 phase states of a QPSK and QAM signal

A

constellation

80
Q

it measures pulling tension applied to cables

A

dynanometer

81
Q

strand splices should be within ____ to ____ from the pole

A

18’ to 24” inches

82
Q

the most commonly used hardline connector

A

pin

83
Q

what 3 electrical characteristics impact a cables impedance

A

capacitance, inductance, resistance

84
Q

most used fiber type used in HFC plant

A

single mode

85
Q

prevents the cable from being over tensioned during pulling

A

breakaway swivel

86
Q

sending AC power from 2 different Power Supplies

A

bucking power

87
Q

32 bit address 8 bit per octet written in dotted decimal notation

A

IPV4

88
Q

aeronautical frequency range

A

108 to 137 MHZ

89
Q

the position of the amplitue of an AC waveform as it relates to time

A

Phase

90
Q

used to determine the distance to a known fault from a specific location

A

TDR

91
Q

TDR has same polarity causes an

A

OPEN

92
Q

TDR has different polarity causes a

A

SHORT

93
Q

failure to get a response from the CMTS to a RNG-REQ

A

T3 (200ms)(16 missed in a row)

94
Q

Failure to get a response to a station maintenance request

A

T4 (30-35 sec)

95
Q

a CM modulates in ____path and it demodulates in the ___path

A

Return and Forward

96
Q

SCDMA manages

A

Code

97
Q

TDMA

A

Time slots

98
Q

this protocol Does NOT allow for data retransmissions

A

UDP

99
Q

this protocol Does allow for data retransmissions

A

TCP

100
Q

a simple mathematical representation of an analog signal

A

digital signal

101
Q

3 steps of digitizing and analog signal

A
  1. sampling(Nyquist rule)
  2. quanitization(signing values to the samples)
  3. encoding(convert binary bit stream)
102
Q

varying amplitude, frequency, or phase of a carrier wave by superimposing information (data) onto it

A

modulation

103
Q

superimposing 60 Cycles Per Second AC onto RF signals

A

Hum modulation

104
Q

unwanted sum/diff frequencies resulting from heterodyning (mixing) of 2 or more carriers

A

Beats

105
Q

undesired change in the shape of a waveform

A

distortion

106
Q

combonation of QPSK and ASK

A

QAM

107
Q

digital modulation that varies phase and amplitude

A

QAM

108
Q

If the input level (in dBmV) numerically equals an amplifier’s NF, the output C/N ratio will always be

A

59.2 dB.

Jeopardy 2016 Garza (21 decks)

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