The '3d1x3 Vol 1 CDC Ed 2' quiz assesses knowledge on RF modulation techniques, including why modulation is used, types of modulation, and calculations for modulation percentages. It is crucial for understanding effective long-distance RF transmission and is tailored for individuals in military communications roles.
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.
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Modulating signal, upper sideband, and lower sideband.
Carrier, upper sideband, and lower sideband.
Upper sideband and modulating signal.
Carrier and modulating signal.
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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.
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Two times the modulating signal.
The same as the modulating signal.
Determined by the modulation index.
Defined in terms of maximum amount of modulation.
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81.8
85.5
88
122
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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.
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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.
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1
3
10
0.1
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Deviation divided by frequency of modulation.
Deviation times frequency of modulation.
Sideband divide by carrier frequency.
Sideband times carrier frequency.
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5
0.5
0.3
3
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Space
Guard Band
Buffer zone
Prevention field
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Frequency
Amplitude
Height
Phase
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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.
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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.
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Sampling
Rectifying
Oscillating
Band Limiting
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Control
Parity
Start
Stop
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One Character
Block of data
A parity bit
A stop bit
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Determines parity.
Determines transmission rate.
Determines whether transmission is in ASCII format.
Determines whether transmission is synchronous or asynchronous.
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Checksum.
Cyclic redundancy check
Vertical redundancy check.
Longitudinal redundancy check.
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Receiving end.
In the oscillator.
Transmitting end.
In the primary buffers.
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Photo transistors.
Hybrid photodiodes.
Semiconductor laser diodes.
Integrated photodiode/preamplifiers.
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Incoherent.
Coherent.
Ordinary.
Invisible.
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Positive intrinsic negative and avalanche photodiode.
Light-emitting diode and avalanche photodiode.
Light emitting diode and semiconductor laser.
Tunnel and zener diodes.
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Light emitting diode.
Avalanche photodiode.
Positive intrinsic negative diode.
Integrated photodiode/preamplifier.
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Receiver.
Repeaters.
Regenerators.
Optical amplifiers.
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Pigtail
Jumper
Patch cord
Breakout cables
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Biconic.
Field (FC).
Straight tip (ST).
Sub-miniature, type A (SMA).
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Mastro
Scholten
Kirk
Feeley
1 hertz to 1 kilohertz.
1 hertz to 1 gigahertz.
10 hertz to 10 kilohertz.
10 hertz to 10 gigahertz.
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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.
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Is a problem for electronic components in satellites and reentry vehicles.
Has a vertical amplitude that decreases inversely with distance, but remains significant for many kilometers.
Has very intense radial electrical fields, azimuthal magnetic fields, and time-varying air conductivity.
Is the only nuclear environment that may be imposed on many systems simultaneously with the expenditure of very few weapons.
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Secondary.
Radiated.
Plasma.
Source
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Blackout effects.
Absorption effects.
Scintillation effects.
Attenuation effects.
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Scintillation.
Local effects.
Source region.
Long-line effects.
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Linear
AC line.
DC line.
Power line.
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Line noise.
Internal to the radio.
External to the radio.
Radio receiver trouble.
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Enemy jamming.
Internal interference.
Radio receiver trouble.
Unintentional interference.
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Rusty bolt.
Co-channel.
Brute force.
Spurious responses.
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Transmitter.
Rusty-bolt.
Spurious
Receiver.
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Change the bulb.
Ground out the light fixture.
Install a noise reject filter on the light.
Install a noise reject filter on the receiver.
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Relays.
Lighting.
Power line.
Switching equipment.
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Mishap prevention.
Frequency management.
Electrostatic discharge control.
Spectrum interference resolution.
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Affected unit.
Affected major command.
Electromagnetic environmental effects office.
Spectrum interference resolution office.
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Request engineering assistance.
Contact the base frequency manager.
Systematically gather data for analysis.
Contact the spectrum interference resolution office.
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The operator.
Major command.
The frequency manager.
Federal Communications Commission.
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The operator.
Joint spectrum center.
Installation spectrum manager.
Federal Communications Commission.
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Circuit jacks.
Rotary switch.
Range push button.
Touch-hold button.
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Digital.
Annunciator.
Range indicator.
Analog bar graph.
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Quiz Review Timeline (Updated): Mar 21, 2023 +
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