3D1X3 Volume 1

2. (017) When you use the Fluke 8025A, which voltage range do you select to measure 50 volts DC?

Volts AC

Volts DC

Millivolts AC

Millivolts DC

3. (023) What type of equipment helps resolve intermittent electrical problems because of poor grounding?

Earth ground tester

Frequency counter

Spectrum analyzer

Oscilloscope

4. (001)What are the three general categories used to produce modulation in radio frequency (RF) transmission today?

Binary amplitude shift keying, frequency shift keying, and phase shift keying.

Pulse amplitude, pulse width, and pulse position.

Amplitude, frequency, and phase.

Analog, digital and shift keying.

5. (015) Who is initially responsible for reporting an electromagnetic interference?

The operator

Major command

The frequency manager

Federal Communications Commission

6. (040) What type of uninterruptible power supply (UPS) has traditionally been referred to as "offline" by technicians?

Passive standby

Line interactive

Double conversion

Ferro resonant standby

7. (023) How often must you continue to test system grounds?

Randomly

Periodically

Every 10 years

Just one time only

8. (001)What is one reason for modulation that involves modulating low frequency signals for transmission over long distances?

Spectrum conservation

Channel allocation

Ease of radiation

Companding

9. (015) At what level does the Air Force want electromagnetic interference problems resolved?

Affected unit

Affected major command

Electromagnetic environmental effects office

Spectrum interference resolution office

10. (016) Which feature of the Fluke 8025A multimeter do you use to select various measurement functions?

Circuit jacks

Rotary switch

Range push button

Touch-hold button

11. (027) A power reading that uses the abbreviation dBm indicates the

Ratio of decibels relative to a 1-milliwatt standard

Ratio of decibels relative to a 1-megawatt standard

Actual power level expressed in milliwatts

Actual power level expressed in megawatts

12. (016) Which feature of the Fluke 8025A locks the measurement into the display for viewing and automatically updates the display when you take a new measurement?

Rotary switch.

Range push button

Power-up self-test

Touch-hold push button

13. (036) What are the three main functions of grounding?

Personnel safety, equipment protection, and noise reduction

Signal amplification, personnel safety, and emissions security

Equipment protection, signal amplification, and capacitance reaction

Corrosion prevention, emissions security, and over-voltage protection

14. (017) When testing a diode with the 8025A, the leads across a "good" diode produces an "OL" (open) on the display in one direction while reversing the leads produces

A continuous audible tone

“SL” (short) on the display

A wavering audible tone

Three short beeps

15. (014) How can you normally eliminate electromagnetic interference noise bursts caused by sodium and mercury vapor lights that have stopped working while the power is still applied?

Change the bulb

Ground out the light fixture

Install a noise reject filter on the light

Install a noise reject filter on the receiver

16. (033) What operational capability of the communication service monitor produce sine, square and triangle waveforms?

Scope

Duplex

Receiver

Function generator

17. (020) What area of a digital storage oscilloscope takes digitized samples and performs numerous manipulations on the data including measuring rise and fall times, periods, time intervals, and math computations?

Microprocessors

Acquisition

Memory

Input

18. (008) What type of light is emitted from a laser?

Incoherent

Coherent

Ordinary

Invisible

19. (002)The bandwidth of an amplitude modulated signal is

Two times the modulating signal.

The same as the modulating signal.

Determined by the modulation index.

Defined in terms of maximum amount of modulation.

20. (004) In phase modulation, what part of the carrier signal is varied?

Frequency

Amplitude

Height

Phase

21. (015) What do you do when you are reasonably sure electromagnetic interference exists?

Request engineering assistance

Contact the base frequency manager

Systematically gather data for analysis

Contact the spectrum interference resolution office

22. (040) What power line fault category is more typically referred to as Electro-Magnetic Interference and Radio Frequency Interference?

Sag

Spike

Noise

Blackout

23. (010) Which repeater amplifies optical signal without converting to and from the electrical domain?

Receiver

Repeaters

Regenerators

Optical amplifiers

24. (011) Which fiber-optic connector uses quick-release, keyed bayonet couplings that are preferred in situations where severe vibrations are not expected?

Biconic

Field (FC)

Straight tip (ST)

Sub-miniature, type A (SMA)

25. (012) A system-generated electromagnetic pulse is a problem for satellites and reentry vehicles that are

Susceptible to the wideband frequency phenomenon

Directly exposed to nuclear radiations from a high-altitude burst

Affected by the azimuthal magnetic fields and time-varying air conductivity

Influenced by the signal fading or waveform distortion caused by the structured plasma field

26. (014) What type of electromagnetic interference occurs when a receiver responds to off-frequency signals?

Rusty bolt

Co-channel

Brute force

Spurious responses

27. (018) How are voltage, time, and depth represented on the oscilloscope display?

Voltage = intensity, time = vertical axis, and depth = horizontal axis

Voltage = intensity, time = horizontal axis, and depth = vertical axis

Voltage = horizontal axis, time = vertical axis, and depth = intensity

Voltage = vertical axis, time = horizontal axis, and depth = intensity

28. (006) In asynchronous transmissions, what bit is used by the receiving device to verify that the transmission was received correctly?

Control

Parity

Start

Stop

29. (007) When using vertical redundancy check, what significance does the amount of ones have in a data bit pattern?

Determines parity

Determines transmission rate

Determines whether transmission is in ASCII format

Determines whether transmission is synchronous or asynchronous

30. (007) When using forward error control as a method of error correction, where does error correction take place?

Receiving end

In the oscillator

Transmitting end

In the primary buffers

31. (014) If the interference can be eliminated by disconnecting the receiving antenna, the source of the disturbance is most likely

Line noise

Internal to the radio

External to the radio

Radio receiver trouble

32. (034) Why should the number of splices be controlled during fiber optic installation?

Prevent eavesdropping

To aid in troubleshooting

Reduce potential damage

Minimize transmission loss

33. (041) How many phases of generator power are usually required for industrial and commercial applications?

Single

Double

Three

Four

34. (002)If a carrier frequency of 1 MHz and a modulating tone of 10 kHz goes to the modulator, the output signal include

1.01 MHz, 1 MHz, and 0.99 MHz.

1.1 MHz, 1 MHz, and 0.9 MHz.

1.11 MHz, 1 MHz, 0.99 MHz.

1.111 MHz, 1 MHz, 0.999 MHz.

35. (002) Which statement concerning bandwidth is true?

Overmodulating increases bandwidth because the distortion produces harmonics.

Undermodulating increases bandwidth because the distortion produces harmonics.

Overmodulating increases bandwidth because the output’s increased amplitude.

Undermodulating increases bandwidth because the output’s decreased amplitude.

36. (012) Atmospheric disturbances from initial nuclear radiation on higher frequencies affect communications by

Blackout effects

Absorption effects

Scintillation effects

Attenuation effects

37. (014) What man-made noise results from voltage surges, arcing, or corona discharges?

Relays

Lighting

Power line

Switching equipment

38. (029) The two switches on the front panel of the wattmeter correspond to the

Power range of the reverse element

Power range of the forward element

Frequency range of the reverse element

Frequency range of the forward element

39. (003) A 5 kHz modulating signal has enough peak voltage to cause a deviation of 15 kHz. What is the modulation index?

5

0.5

0.3

3

40. (008) Light sources that are applicable to fiber optic waveguide are light-emitting diodes and

Photo transistors

Hybrid photodiodes

Semiconductor laser diodes

Integrated photodiode/preamplifiers

41. (011) A short section of single fiber cable that has a connector at each end is called a

Pigtail

Jumper

Patch cord

Breakout cables

42. (015) What Air Force program is used to resolve an electromagnetic interference incident?

Mishap prevention

Frequency management

Electrostatic discharge control

Spectrum interference resolution

43. (022) Which of these bit rates do you use for a bit error rate test on a 64 kbps data circuit?

511 bps

9600 bps

64 kbps

1.544 Mbps

44. (003) What is it called when a narrow frequency band between adjacent stations prevent frequency modulated sidebands from overlapping?

Space

Guard band.

Buffer zone.

Prevention field.

45. (009) What photo detector converts one photon to one electron?

Light emitting diode

Avalanche photodiode

Positive intrinsic negative diode

Integrated photodiode/preamplifier

46. (014) Which type of intermodulation interference varies significantly with temperature and weather conditions?

Transmitter

Rusty-bolt

Spurious

Receiver

47. (029) What feature is useful for making adjustments to optimize any of the parameters which the wattmeter measures?

Peaking aid

Minimum reading

Maximum reading

Standing wave ratio

48. (033) What operational capability of the communication service monitor receives amplitude and frequency modulated signals?

Scope

Receiver

Generator

Function generator

49. (003) What is the formula to find the modulating index?

Deviation divided by frequency of modulation.

Deviation times frequency of modulation.

Sideband divide by carrier frequency.

Sideband times carrier frequency.

50. (020) What type of sampling does a digital storage oscilloscope normally use on single-shot or seldom-occurring signals?

Sequential

Repetitive

Real-time

Random

51. (020) In acquiring a 4K record length on a digital storage oscilloscope, how many samples can you view at one time?

1,000

2,000

3,000

4,000

52. (002)When the modulating signal and carrier signal are combined within a modulator, the output signal contains

Modulating signal, upper sideband, and lower sideband.

Carrier, upper sideband, and lower sideband.

Upper sideband and modulating signal.

Carrier and modulating signal.

53. (006) If an error should occur, what transmission is lost in an synchronous transmission?

One character

Block of data

A parity bit

A stop bit

54. (028) During what operation is the radio frequency blanking output used on the HP 436A power meter?

While in WATT mode operation

While in REMOTE mode operation

During the automatic zeroing operation

During calibration adjustment operation

55. (038) What are the two basic functions of shielding?

Prevent interference between multiple emanating systems and minimize compromisingemanations

Prevent interference between multiple emanating systems and block all emanations fromexiting a secure facility

To equalize all electronic systems to the same potential and minimize compromisingemanations

To equalize all electronic systems to the same potential and block all emanations from exiting asecure facility

56. (019) Which oscilloscope probe is essentially just a shielded piece of wire?

Current

Passive 1:1

Passive divider, 1:10

Active field effect transistor

57. (005) What is the first step in the pulse code modulation process?

Discrete amplitudes are assigned to the sampling pulses

A binary code number is assigned to the sample

The quantizer limits the amplitude of the pulses

The analog signal is band limited

58. (005) What part of the pulse code modulation process converts a continuous time signal into a discrete time signal?

Sampling

Rectifying

Oscillating

Band limiting

59. (013) Currents and voltages induced on power lines, cable links, and pipelines by electromagnetic pulse are called

Scintillation

Local effects

Source region

Long-line effects

60. (003) In frequency modulation, a significant sideband contains at least what percentage of the total transmitted power?

1

3

10

0.1

61. (014) Little or no variations in the strength of the interfering signal when moving the receiving antenna for short distance normally indicates

Enemy jamming

Internal interference

Radio receiver trouble

Unintentional interference

62. (037) What kind of bonds are normally applied to signal reference bonds?

None

Brazing

Welding

Mechanical

63. (021) Which pattern simulator section of a bit error rate test set controls the clock selector and selects either the external clock or the internal clock for processing?

Clock drivers

Code converter

Data/sync selector

Data/clock select encoder

64. (015) Who is tasked to provide interference resolution support to the unified commanders?

The operator

Joint spectrum center

Installation spectrum manager

Federal Communications Commission

65. (036) What facility ground subsystem uses surge arrestors?

The earth electrode

The fault protection

The signal reference

The lightning protection

66. (002) Use the formula on page 1–3. If an oscilloscope displays a modulation envelope having an Emax of 200 volts and an Emin of 20 volts, what is the modulation percentage?

81.8.

85.5

88

122

67. (004) In phase modulation, the carrier's

Phase is shifted at the rate of the modulating signal

Phase shifted with the phase of the modulating signal

Amplitude is shifted at the rate of the modulating signal

Amplitude is shifted with the phase of the modulating signal

68. (026) Which one of these is not an application of a radio frequency generator?

Verifying transmitter frequencies

Troubleshooting receivers

Checking antenna systems

Aligning galvanometers

69. (025) What component of a protocol analyzer discards frames based on its definition or activates a trigger based on the trigger definition?

Filter

Buffer

Counter

Central processing unit

70. (024) Resistance reading on the ground under test is plotted on a graph of

Resistance versus distance

Current versus distance

Frequency versus time

Amplitude versus time

71. (012) High-altitude electromagnetic pulse is a wideband phenomenon that involves which frequency range?

1 hertz to 1 kilohertz

1 hertz to 1 gigahertz

10 hertz to 10 kilohertz

10 hertz to 10 gigahertz

72. (031) Which electronic counter measurement represents the average bit-to-bit time of an input signal?

Period

Scaling

Frequency

Time interval

73. (009) What are the two main types of photodetectors?

Positive intrinsic negative and avalanche photodiode

Light-emitting diode and avalanche photodiode

Light emitting diode and semiconductor laser

Tunnel and zener diodes

74. (012) High-altitude electromagnetic pulse environment protection is important for critical, time urgent mission systems because it

Is a problem for electronic components in satellites and reentry vehicles

Has a vertical amplitude that decreases inversely with distance, but remains significant formany kilometers

Has very intense radial electrical fields, azimuthal magnetic fields, and time-varying airconductivity

Is the only nuclear environment that may be imposed on many systems simultaneously with theexpenditure of very few weapons

75. (012) Which distinct region of the source region electromagnetic pulse is produced by the interactions between the weapon products and the earth's atmosphere?

Secondary

Radiated

Plasma

Source

76. (016) Which part of the Fluke 8025A's display section indicates the absolute value of the input?

Digital

Annunciator

Range indicator

Analog bar graph

77. (032) What function is not part of the communication service monitor?

Radio frequency generator

Analog multimeter

Oscilloscope

Receiver

78. (013) Which type of filters are always used in combination with surge arresters?

Linear

AC line

DC line

Power line

79. (030) Which measurement is not made with a spectrum analyzer?

Frequency stability

Peak-peak voltage

Amplitude modulation

Subcarrier oscillator outputs

80. (038) What equipment should be designated as RED?

Equipment processing unencrypted unclassified information

Equipment processing clear-text unclassified information

Equipment processing encrypted classified information

Equipment processing clear-text classified information

81. (019) Which probe does not need to actually make contact with the circuit under test?

Current

Passive 1:1

Active (FET)

Passive divider, 10:1

82. (020) Sampled data points are stored in the memory of a digital storage oscilloscope as

Sequential records

Waveform points

Record lengths

Record points

83. (037) Bonds in the earth electrode subsystem normally are direct permanent bonds and do not exceed a resistance of

1 milliohm

2 milliohms

5 milliohms

10 milliohms

84. (025) What protocol analyzer test window provides information concerning the network utilization and frame error that are related to a specific protocol?

Media Access Control (MAC) node statistics

Connection statistics

Protocol statistics

Node discovery

85. (003) The output of the oscillator in a frequency modulation (FM) modulator increases in frequency with each

Positive half cycle of the carrier.

Negative half cycle of the carrier.

Positive half cycle of the modulating signal.

Negative half cycle of the modulating signal.

86. (018) Which oscilloscope's input coupling position allows you to view both AC and DC components of the input signal?

DC

AC

Norm

Ground

87. (028) The measurable frequency and power ranges of the HP 436A power meter are determined by the

Digital display

Power sensor

Power meter

Interface

88. (020) In real-time sampling, what type of interpolation is used when measuring pulse waves?

Sine

Linear

Non-uniform

Companding

89. (021) What pattern simulator section of the bit error rate test set accepts a 48-bit parallel word and generates a serial pattern?

48-bit transmitter only

48-bit register and 8-bit word display

Pseudo random noise (PRN) generator

Pseudo random noise (PRN) comparator

90. (031) Which are the correct four classes of electronic counters?

Frequency counters, time counters, microwave counters, and reciprocal counters

Frequency counters, universal counters, microwave counters, and reciprocal counters

Frequency counters, universal counters, period counters, and reciprocal counters

Scaling counters, universal counters, microwave counters, and reciprocal counters

91. Which one do you like?

Option 1

Option 2

Option 3

Option 4

92. (019) Which probe lets you use the oscilloscope to measure higher voltage levels, raises the input impedance, does not require a bias voltage, and attenuates noise?

Current

Passive 1:1

Active (FET)

Passive divider, 10:1

93. (007) What error detection method is used for checking a data block greater than 512 and is about 99 percent effective in most applications?

Checksum

Cyclic redundancy check

Vertical redundancy check

Longitudinal redundancy check

94. (039) Which of these is considered a primary cell?

Nickel cadmium

Carbon zinc

Lead-acid

Lithium

95. (022) On the bit error rate test set, the 25-pin connectors are designed to operate with data modems to

Simplify connection of test equipment to the modem under test and to transmit the test pattern

Isolate test equipment from the data circuit under test and to transmit the test pattern

Isolate test equipment from the data circuit under test and to carry the necessary signaling andhandshake signals for modem operations

96. (024) A known current is generated by the earth ground tester between the earth ground electrode and the

Grounding point

Inner earth stake Y

Auxiliary current probe

Auxiliary potential probe

97. (025) What protocol analyzer test window provides information concerning the bandwidth utilization and the number of connections that are related to specific nodes?

Media Access Control (MAC) node statistics

Connection statistics

Protocol statistics

Node discovery

98. (035) Which is a function of Air Force Communications Special Instructions?

Permanently change technical order procedures

Means to issue optional equipment modifications

Provide significant system repair history for equipment transfers

Paraphrases technical order procedures via quick reference index cards

99. (022) Which is the primary means of measuring the quality of transmitted digital information, and how is this means derived?

Bit error rate (BER), the ratio of the number of bits in error to total number of bits transmitted

Bit error rate (BER), the difference between the number of bits transmitted and the totalnumber of bits received

Distribution of errors, the ratio of the number of bits in error to total number of bits transmitted

Distribution of errors, the difference between the number of bits transmitted and the totalnumber of bits received

100. (036) What facility ground subsystem is also called the safety ground?

The earth electrode

The fault protection

The signal reference

The lightning protection

101. (025) What protocol analyzer test window automatically runs in the background when the protocol analyzer application is activated?

Media Access Control (MAC) node statistics

Connection statistics

Protocol statistics

Node discovery

3D1X3 Volume 1

1. QUESTION?

2.

What first name or nickname would you like us to use?

2. (017) When you use the Fluke 8025A, which voltage range do you select to measure 50 volts DC?

3. (023) What type of equipment helps resolve intermittent electrical problems because of poor grounding?

4. (001)What are the three general categories used to produce modulation in radio frequency (RF) transmission today?

5. (015) Who is initially responsible for reporting an electromagnetic interference?

6. (040) What type of uninterruptible power supply (UPS) has traditionally been referred to as "offline" by technicians?

7. (023) How often must you continue to test system grounds?

8. (001)What is one reason for modulation that involves modulating low frequency signals for transmission over long distances?

9. (015) At what level does the Air Force want electromagnetic interference problems resolved?

10. (016) Which feature of the Fluke 8025A multimeter do you use to select various measurement functions?

11. (027) A power reading that uses the abbreviation dBm indicates the

12. (016) Which feature of the Fluke 8025A locks the measurement into the display for viewing and automatically updates the display when you take a new measurement?

13. (036) What are the three main functions of grounding?

14. (017) When testing a diode with the 8025A, the leads across a "good" diode produces an "OL" (open) on the display in one direction while reversing the leads produces

15. (014) How can you normally eliminate electromagnetic interference noise bursts caused by sodium and mercury vapor lights that have stopped working while the power is still applied?

16. (033) What operational capability of the communication service monitor produce sine, square and triangle waveforms?

17. (020) What area of a digital storage oscilloscope takes digitized samples and performs numerous manipulations on the data including measuring rise and fall times, periods, time intervals, and math computations?

18. (008) What type of light is emitted from a laser?

19. (002)The bandwidth of an amplitude modulated signal is

20. (004) In phase modulation, what part of the carrier signal is varied?

21. (015) What do you do when you are reasonably sure electromagnetic interference exists?

22. (040) What power line fault category is more typically referred to as Electro-Magnetic Interference and Radio Frequency Interference?

23. (010) Which repeater amplifies optical signal without converting to and from the electrical domain?

24. (011) Which fiber-optic connector uses quick-release, keyed bayonet couplings that are preferred in situations where severe vibrations are not expected?

25. (012) A system-generated electromagnetic pulse is a problem for satellites and reentry vehicles that are

26. (014) What type of electromagnetic interference occurs when a receiver responds to off-frequency signals?

27. (018) How are voltage, time, and depth represented on the oscilloscope display?

28. (006) In asynchronous transmissions, what bit is used by the receiving device to verify that the transmission was received correctly?

29. (007) When using vertical redundancy check, what significance does the amount of ones have in a data bit pattern?

30. (007) When using forward error control as a method of error correction, where does error correction take place?

31. (014) If the interference can be eliminated by disconnecting the receiving antenna, the source of the disturbance is most likely

32. (034) Why should the number of splices be controlled during fiber optic installation?

33. (041) How many phases of generator power are usually required for industrial and commercial applications?

34. (002)If a carrier frequency of 1 MHz and a modulating tone of 10 kHz goes to the modulator, the output signal include

35. (002) Which statement concerning bandwidth is true?

36. (012) Atmospheric disturbances from initial nuclear radiation on higher frequencies affect communications by

37. (014) What man-made noise results from voltage surges, arcing, or corona discharges?

38. (029) The two switches on the front panel of the wattmeter correspond to the

39. (003) A 5 kHz modulating signal has enough peak voltage to cause a deviation of 15 kHz. What is the modulation index?

40. (008) Light sources that are applicable to fiber optic waveguide are light-emitting diodes and

41. (011) A short section of single fiber cable that has a connector at each end is called a

42. (015) What Air Force program is used to resolve an electromagnetic interference incident?

43. (022) Which of these bit rates do you use for a bit error rate test on a 64 kbps data circuit?

44. (003) What is it called when a narrow frequency band between adjacent stations prevent frequency modulated sidebands from overlapping?

45. (009) What photo detector converts one photon to one electron?

46. (014) Which type of intermodulation interference varies significantly with temperature and weather conditions?

47. (029) What feature is useful for making adjustments to optimize any of the parameters which the wattmeter measures?

48. (033) What operational capability of the communication service monitor receives amplitude and frequency modulated signals?

49. (003) What is the formula to find the modulating index?

50. (020) What type of sampling does a digital storage oscilloscope normally use on single-shot or seldom-occurring signals?

51. (020) In acquiring a 4K record length on a digital storage oscilloscope, how many samples can you view at one time?

52. (002)When the modulating signal and carrier signal are combined within a modulator, the output signal contains

53. (006) If an error should occur, what transmission is lost in an synchronous transmission?

54. (028) During what operation is the radio frequency blanking output used on the HP 436A power meter?

55. (038) What are the two basic functions of shielding?

56. (019) Which oscilloscope probe is essentially just a shielded piece of wire?

57. (005) What is the first step in the pulse code modulation process?

58. (005) What part of the pulse code modulation process converts a continuous time signal into a discrete time signal?

59. (013) Currents and voltages induced on power lines, cable links, and pipelines by electromagnetic pulse are called

60. (003) In frequency modulation, a significant sideband contains at least what percentage of the total transmitted power?

61. (014) Little or no variations in the strength of the interfering signal when moving the receiving antenna for short distance normally indicates

62. (037) What kind of bonds are normally applied to signal reference bonds?

63. (021) Which pattern simulator section of a bit error rate test set controls the clock selector and selects either the external clock or the internal clock for processing?

64. (015) Who is tasked to provide interference resolution support to the unified commanders?

65. (036) What facility ground subsystem uses surge arrestors?

66. (002) Use the formula on page 1–3. If an oscilloscope displays a modulation envelope having an Emax of 200 volts and an Emin of 20 volts, what is the modulation percentage?

67. (004) In phase modulation, the carrier's

68. (026) Which one of these is not an application of a radio frequency generator?

69. (025) What component of a protocol analyzer discards frames based on its definition or activates a trigger based on the trigger definition?

70. (024) Resistance reading on the ground under test is plotted on a graph of

71. (012) High-altitude electromagnetic pulse is a wideband phenomenon that involves which frequency range?

72. (031) Which electronic counter measurement represents the average bit-to-bit time of an input signal?

73. (009) What are the two main types of photodetectors?

74. (012) High-altitude electromagnetic pulse environment protection is important for critical, time urgent mission systems because it

75. (012) Which distinct region of the source region electromagnetic pulse is produced by the interactions between the weapon products and the earth's atmosphere?

76. (016) Which part of the Fluke 8025A's display section indicates the absolute value of the input?

77. (032) What function is not part of the communication service monitor?