Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Jeopardy 2016 Garza > NCT 4 16 > Flashcards

NCT 4 16 Flashcards

(108 cards)

Start Studying
1
Q

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

A

Output Capability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

used to set the amplifier’s output tilt

A

Interstage Equalizer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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:

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

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

A

Mop-up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

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

A

Activation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

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

A

Optical Modulation Index (OMI)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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

A

The Laser

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Device used to convert an analog signal to a digital signal

A

Digitizer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

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

A

Beat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

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

A

Co-Channel Interference

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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

A

Ghosts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

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

A

Common Path Distortion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

Oxidation:

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

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

A

Harmonics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

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

A

Termination Noise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

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

A

Power Passing Chokes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

an overload effect noted through digital signal processing equipment.

A

Spectral Re-growth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

FCC

A

Federal Communications Commission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Cumulative Leakage Index

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Environmental Factors That Affect Signal Leakage

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

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

A

March and October

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
LTE stands for
Long-Term Evolution
26
LTE operates in the
700 MHz to 800 MHz frequency range
27
cable operator arrives at a cumulative (average-weighted) score. The pass/fail score is
64
28
The FCC requires that cable operators file an annual CLI calculation, using a Form 320. The completed Forms 320 are kept in
your system’s public file.
29
During a flyover, an airplane flies over the system, measuring any detectable leaks. This is done at an altitude
1500 feet
30
Subatomic particles found in atoms that balance out the positive charge of a proton (within the nucleus) with their negative charge
Electrons
31
Substance that allows heat or electricity to pass along or through it, for example, cables, wires, metal surfaces, and water
Conductor
32
The device that uses the electricity. It is any device that draws current
Load
33
electromotive force (or pressure) that causes electrons to flow in a circuit
Voltage
34
opposition a material offers to the flow of current
Resistance
35
The amount of electrons that pass a given point in the conductor in one second
Coulomb
36
The difference in voltage between one point and another
Potential Difference
37
defined as one complete sine wave.
cycle
38
the physical length of one cycle of the voltage waveform.
Wavelength
39
the amount of time it takes an AC waveform to complete one cycle
Period
40
the position of the amplitude value as related to time.
Phase
41
peak value of an AC waveform
Amplitude
42
Span Current × Span Resistance =
Voltage Drop
43
The amount of energy available to move a certain number of electrons from one point to another in an electrical circuit.
Voltage
44
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
15 minute wait rule
45
There are three methods for testing batteries:
Battery load test Battery voltage test Battery conductance test
46
Always wear______ when working with batteries
acid-resistant hand protection and apron, safety glasses, and face shields
47
Compares the speed of light through a material to the speed of light through a vacuum
Index of Refraction
48
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.
Total Internal Reflection
49
In the 1960s, _____ work with lasers gave us the ability to add information to light waves.
Theodore Maiman’s
50
your system adds or changes information on the design map. The corrected map is called an
As-Built Map
51
anchors are designed for use in soft soil where screw anchors are less effective
Never Creep Anchors
52
designed to expand in holes bored in rock or concrete
Rock or concrete anchors
53
A cable positioner is pushed in front of a lasher by a cable block pusher to uniformly position multiple cables that are being lashed
magic box
54
This device is used to push equipment ahead of a pulled lasher
Cable block pusher, also known as a shotgun or a shuttle.
55
8-16 bit Hexidecimal numbers seperated by colons
IPV6
56
Additional bits (symbols) added to data to detect + correct errrors
FEC
57
the number of errored bits compared to the total number of bits
BER
58
an overall digital signal quality measurement
MER
59
the standard for HSI in a CATV system
DOCSIS
60
According to the book, fwd levels could be as high as
50dBmv
61
in watchtower jobs, TSI, outages, are associated to what network element
Node
62
List two items that TSI checks
911 check and % of commercial customers
63
what is the importance of suspending a job when you will temporary stop working on it
time accountabliity
64
combining multiple QAM to form a single "wide band channel"
channel bonding
65
a set of rules for how devices on a network exchange information
Protocol
66
DOCSIS 3.0 two new advanatage
IPV6 and channel bonding
67
what would be a likely reason for having excessive distortions at the output of an amp
overdriving, high input hybrid to amp
68
what would be a likely reason for having a low CNR at the input of and amp
starving, low inputs into hybrid to amp
69
a card that can detect if light is on a fiber
photosensitive card
70
when the amp gain = the losses before the amp
unity gain
71
what 2 factors impact a cables DC Loop resistance
Length and diameter
72
In analog NTSC tv analog channel, how man MHZ away from the video carrirer is the color and audio
3.58 is the color, and 4.5 mhz is the audio
73
when information is superimposed onto a carrier
modulation
74
audio carrier is how many db lower than the video carrirer
10-17db
75
A distortion caused from oxidation between 2 dissimilar metals
common path distortion
76
a mode in flux used to identify multiple DOCSIS devices that share one common problem
signature
77
the most effective method for measuring and correcting frequency response problems
sweep
78
whats the most accurate way to test PS batteries
under load
79
a graphic representation of the 4 phase states of a QPSK and QAM signal
constellation
80
it measures pulling tension applied to cables
dynanometer
81
strand splices should be within ____ to ____ from the pole
18' to 24" inches
82
the most commonly used hardline connector
pin
83
what 3 electrical characteristics impact a cables impedance
capacitance, inductance, resistance
84
most used fiber type used in HFC plant
single mode
85
prevents the cable from being over tensioned during pulling
breakaway swivel
86
sending AC power from 2 different Power Supplies
bucking power
87
32 bit address 8 bit per octet written in dotted decimal notation
IPV4
88
aeronautical frequency range
108 to 137 MHZ
89
the position of the amplitue of an AC waveform as it relates to time
Phase
90
used to determine the distance to a known fault from a specific location
TDR
91
TDR has same polarity causes an
OPEN
92
TDR has different polarity causes a
SHORT
93
failure to get a response from the CMTS to a RNG-REQ
T3 (200ms)(16 missed in a row)
94
Failure to get a response to a station maintenance request
T4 (30-35 sec)
95
a CM modulates in ____path and it demodulates in the ___path
Return and Forward
96
SCDMA manages
Code
97
TDMA
Time slots
98
this protocol Does NOT allow for data retransmissions
UDP
99
this protocol Does allow for data retransmissions
TCP
100
a simple mathematical representation of an analog signal
digital signal
101
3 steps of digitizing and analog signal
1. sampling(Nyquist rule) 2. quanitization(signing values to the samples) 3. encoding(convert binary bit stream)
102
varying amplitude, frequency, or phase of a carrier wave by superimposing information (data) onto it
modulation
103
superimposing 60 Cycles Per Second AC onto RF signals
Hum modulation
104
unwanted sum/diff frequencies resulting from heterodyning (mixing) of 2 or more carriers
Beats
105
undesired change in the shape of a waveform
distortion
106
combonation of QPSK and ASK
QAM
107
digital modulation that varies phase and amplitude
QAM
108
If the input level (in dBmV) numerically equals an amplifier’s NF, the output C/N ratio will always be
59.2 dB.

Jeopardy 2016 Garza (21 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions