EM Wave Characteristics
Radio Frequency Basics
Signal Basics
Modulation
Antenna Basics
100
3 things you can change about a wave
What is frequency, amplitude and phase
100
Waves that follow curvature of earth
What are ground waves
100
2 types of downlinks
What is telemetry and mission data
100
Digital modulation is also called
What is shift keying
100
Oscillator is made up of
What is capacitor and inductor
200
Flow of energy through space
What is Electromagnetic Radiation
200
Frequencies that mainly broadcast as ground waves
What is LF and MF
200
EM wave of specific frequency serves as base to attach information
What is Carrier Wave
200
Digital info is modulated onto carrier wave by altering
What is amplitude, frequency or phase of wave
200
Applying oscillation to an electrical current in a wire results in generation of
What is EM wave of same frequency
300
Decrease in amplitude while traveling over a distance through medium
What is attenuation
300
Layer formed in ionosphere during the day
What is D layer
300
Physical connection (wire/wireless) through air and space
What is Channel
300
Multiple occurrences of same information are often transmitted to provide additional level of assurance
What is Forward Error Correction
300
Vertical compression with the resulting signal having increased horizontal range
What is Gain
400
EM Spectrum order
What is radio, microwave, infrared, visible light, ultraviolet, x-rays, and gamma rays
400
Manages RF spectrum and satellite orbits worldwide
What is International Telecommunication Union Radio (ITU-R)
400
Information added to carrier wave
What is base band
400
Hybrid modulation technique that works by varying amplitude and phase
What is Quadrature Amplitude Modulation
400
Measurement of Maximum and Minimum values of a standing wave pattern along a transmission line to which a load is connected
What is Voltage Standing Wave Ratio
500
Period is _______________ to frequency
What is inversely proportional
500
HF mainly exists as
What is Skywaves
500
5 operations mission of satellite network
What is voice/data transmission, PNT, missile warning, weather, intelligence
500
Used to convert analog to digital, recognizes varying amplitude values and assigns binary code
What is Pulse Code Modulation
500
________ circuits achieve greatest impedance at resonant frequency
What is parallel resonant circuit
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