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Related Flashcards
Cards In This Set
| Front | Back |
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What are some results of multipath interference? (Choose all that apply.)
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Upfade and Excessive retransmissions
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What term best defines the distance traveled in one positive to negative to positive oscillation of an electromagnetic signal?
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Wavelength
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Which of the following statements are true about amplification? (Choose all that apply.
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Antennas are passive gain amplifiers that focus the energy of a signal in one direction.
Signal strength may passively increase due to multipath |
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A standard measurement of frequency is called what?
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Hertz
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When an RF signal bends around an object, this propagation behavior is known as what?
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Diffraction
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When the multiple RF signals arrive at a receiver at the same time and are _________ with theprimary wave, the result can be ____________.
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180 Degrees, & out of Phase which is known as cancellation of the RF signal
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Which of the following is true for a RF signal that experiences multipath(choose all that apply)
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As a result of upfade, a final received signal will never be stronger than the original transmitted signal.
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What is the frequency of an RF signal that cycles 2.4 million times per second
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2.4 MHZ
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What is an example of a time domain tool that could be used by an RF engineer?
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Oscilloscope
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What are some objects or materials that may cause reflection? (Choose all that apply.)
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Metal, Asphalt Road, Lake
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Which of these propogation behaviors can result in multipath
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Refraction, Diffraction, Reflection, Scattering
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Which behavior can be described as an RF signal encountering a chain link fence, causing the signal to bounce into multiple directions?
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Scatter
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What is another name for background noise?
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Noise Floor
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Which of the following can cause refraction of an RF signal traveling through it? (Choose all that apply.)
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Shift in Air Temperature, Change in Air Pressure, Humidity, Smog
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Which of the following statements are true about free space path loss? (Choose all that apply.)
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1.RF signals will attenuate as they travel despite the lack of attenuation caused by obstructions.2. Path loss occurs at a logarithmic rate.
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