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Jared Nationals > Network Cable Theory 1&2 > Flashcards

Network Cable Theory 1&2 Flashcards

1
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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2
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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3
Q

A battery or generator that provides electrical power to the circuit. For example, batteries and generators.

A

Power source

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4
Q

A conductor, such as the copper wire.

A

Path

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5
Q

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

A

Load

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6
Q

The copper-clad aluminum center of the coaxial cable is this

A

conductor

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7
Q

the electromotive force that causes electrons to flow in a circuit.

A

Voltage (E)

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8
Q

Components of a Circuit; E represents this:

A

Voltage

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9
Q

Components of a Circuit; I represents this:

A

Current

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10
Q

Components of a Circuit; R or Ω (Omega) represents this:

A

Resistance

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11
Q

measured in volts and is designated mathematically as E

A

Voltage

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12
Q

The pressure that causes electrons to flow in a circuit.

A

Electromotive force

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13
Q

the flow of electrons through a conductor

A

Current

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14
Q

measured in Amperes

A

Current

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15
Q

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

A

Coulomb

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16
Q

One coulomb passing through a given point in one second is equivalent to this

A

One Amp

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17
Q

the opposition a material offers to the flow of current

A

Resistance

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18
Q

used to control the amount of amperage in a circuit

A

Resistance

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19
Q

measured in Ohms

A

Resistance

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20
Q

states that current is directly proportional to voltage and inversely proportional to resistance.

A

Ohm’s law

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21
Q

What is the formula for Ohm’s Law

A

R=E/I or resistance equals voltage divided by current

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22
Q

Ohm’s Law calculation; E=

A

E= I x R

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23
Q

Ohm’s Law calculation; I=

A

I= E/R

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24
Q

Ohm’s Law calculation; R=

A

R= E/I

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25
Q

the effect of voltage causing the movement of current for a certain length of time

A

Power

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26
Q

Formula for Power

A

P = I x E

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27
Q

Formula for Power; P represents this:

A

Power in Watts

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28
Q

Formula for Power; I represents this:

A

Current in Amperes

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29
Q

Formula for Power; E represents this:

A

EMF in Volts

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30
Q

In a cable network what component is a Load

A

Nodes and Amplifiers

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31
Q

In a cable network what component is a Power Source

A

Power Supply

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32
Q

In a cable network what component is a Conductor

A

Coax cable and Taps

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33
Q

the exponent or the power to which a fixed number (the base) must be raised in order to produce a given number

A

Logarithm

34
Q

used for shortening mathematical calculations

A

Logarithm

35
Q

The exponent of 10 required to equal the number

A

Logarithm

36
Q

the number of times the base is multiplied by itself.

A

Exponent

37
Q

he number being raised

A

Base

38
Q

Any number raised to the exponent 0 is equal to

A

1

39
Q

Any number raised to the exponent 1 is equal to

A

Itself

40
Q

Prefixes; Giga

A

G 10^9

41
Q

Prefixes; Mega

A

M 10^6

42
Q

Prefixes; Kilo

A

k 10^3

43
Q

Prefixes; Milli

A

m 10^-3

44
Q

Prefixes; Micro

A

µ 10^-6

45
Q

Prefixes; Pico

A

n 10^-12

46
Q

Prefixes; Nano

A

p 10^-9

47
Q

by definition, one tenth of a bel

A

decibel

48
Q

he unit for expressing, in logarithmic terms, the ratio between two power levels

A

bel

49
Q

10 log(P1/P2)

A

dB

50
Q

Early television signal levels were measured with a field strength meter calibrated in this

A

microvolts

51
Q

20 log (E (mV) / 1)

A

dBmV

52
Q

20 log (E1 (mV)/ E2 (mV))

A

dBmV

53
Q

Resistance is measured between the center conductor and sheath with the other end shorted when measuring for this:

A

DC Loop Resistance

54
Q

The difference in voltage between one point and another.

A

Potential Difference

55
Q

The direction of an electrical field in a radiated wave.

A

Polarity

56
Q

DC

A

Direct Current

57
Q

AC

A

Alternating Current

58
Q

An electrical current, of which the polarity is periodically reversed.

A

Alternating Current (AC)

59
Q

Types of AC Waveforms

A

Sine, Square, Quasi-square, Sawtooth wave

60
Q

This waveform represents the characteristics of the voltage/current that feeds your home, powers your power supplies, and the television channels that carry the program information to your customers’ homes.

A

Sine Wave

61
Q

This waveform is often found within the switching regulator DC output power supplies in amplifiers.

A

Square Wave

62
Q

A CATV power supply without a load produces a near square wave that combines a non-linear increase and decrease of voltage or current with an extended maximum positive and negative peak value.

A

Quasi-square Wave

63
Q

This waveform is typically used to drive the horizontal trace on an oscilloscope or spectrum analyzer.

A

Sawtooth Wave

64
Q

The square root of the arithmetic mean of the squares of a set of values.

A

Root Mean Square (RMS)

65
Q

a graphical representation of the relationship between two signal attributes

A

waveform

66
Q

defined as one complete sine wave.

A

cycle

67
Q

CPS

A

cycles per second

68
Q

defined as the number of cycles of an AC waveform that occur in one second

A

Frequency

69
Q

can be defined as the physical length of one cycle of the voltage waveform

A

Wavelength

70
Q

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

A

Period (T)

71
Q

the peak value of an AC waveform

A

Amplitude

72
Q

the position of the amplitude value as related to time

A

Phase

73
Q

concept is used in every large cable system that uses amplifiers.

A

Unity Gain

74
Q

The human ear can hear AC waveforms over what range?

A

16-16,000 Hz

75
Q

Channel 2’s analog visual carrier operates at an AC frequency of what?

A

55.25 MHz

76
Q

the point at which the filament in a light bulb reaches a temperature that causes it to glow is called what?

A

Incandescence

77
Q

On the graph of an AC waveform, what is displayed on the vertical axis?

A

Voltage or Current

78
Q

On the graph of an AC waveform, what is displayed on the horizontal axis?

A

Time

79
Q

The section of a waveform above the horizontal axis generally corresponds to what?

A

Positive Polarity

80
Q

The section of a waveform below the horizontal axis generally corresponds to what?

A

Negative Polarity

81
Q

This german physicist was the first to produce radio waves artifically

A

Heinrich Rudolph Hertz

Jared Nationals (14 decks)

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