PseudoTest Flashcards
What is the United Nation’s agency for information and communication technology?
ITU (International Telecommunication Union)
Who manages the US spectrum for non-governmental use?
FCC (Federal Communications Commission)
Who manages the US spectrum for governmental use?
NTIA (National Telecommunications and Information Administration)
What is the offset from the baseline wave? What is it measured in?
Phase. Measured in degrees.
What is the relationship between Wavelength and Frequency?
They are inversely proportional. The higher the frequency, the shorter the wavelength.
What are the two types of wavelength polarization?
Linear and circular
What part of the spectrum is most adversely affected by Scintillation?
UHF (low frequencies)
What part of the spectrum is most adversely affected by the atmosphere?
EHF (high frequencies)
What is the wideband “sweet spot”?
X-band
What are the regions of the EM spectrum where signals can be sent with little interference?
Atmospheric Window
What is a Continuous wave that changes over a time period?
Analog signal
What is a Discrete wave that carries information in binary form?
Digital signal
How many symbols and bits per symbol are in QPSK?
4 symbols. 2 bits per symbol.
What does AM do to its wavelength?
Changes the power of the wave amplitude.
What three processes convert analog signals into digital codes?
Pulse Code Modulation: Sampling, Quantizing, and Encoding.
