1-5 | 6-10 | 11-15 | 16-20 | 21-25 |
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Federal Communications Commission (FCC).
Which US government agency divides the radio frequency spectrum into different bands?
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Transceiver.
A combination transmitter and receiver, built as a single unit and shares common tuned circuits, is called a
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when the frequencies are so high that their wavelength is miniscule.
A waveguide is a type of transmission line that you would use
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no reflected waves.
A nonresonant transmission line is one with
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soil and water in the propagation path.
The Earth’s conductivity is determined by the type of
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SSB and ISB.
High-frequency (HF) transmissions are normally conducted in which two operating modes?
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Copper.
Conductor material resistance in a transmission line leads to this type of loss.
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their outer surface will arc from being very slightly damaged.
All statements concerning waveguides are true except
a. their outer surface will arc from being very slightly damaged. b. their conductive material construction is easily dented. c. their effectiveness is hindered by moisture. d. they can be destroyed by corrosion. |
maximum power transfer results from a nonresonant line.
When discussing resonant and nonresonant transmission lines,
a. resonant lines are often referred to as flat lines. b. maximum power transfer results from a resonant line. c. maximum power transfer results from a nonresonant line. d. significant loss and damage to equipment results from using a nonresonant line. |
Refraction.
This term is used to describe radio waves that bend as they travel from one medium to another that has different density.
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High frequency (HF).
Which frequency band is most susceptible to jamming?
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Frequency.
The amount of skin-effect loss is directly proportional to the
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Inductance and capacitance.
Which two transmission line properties determine its characteristic impedance (ZO)?
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Signal loss would be significant.
This will likely result if a transmission line is terminated in an open.
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atmospheric pressure, and temperature.
The refractive index of air depends on moisture,
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sensitivity
The ability of a receiver to reproduce the signal of a very weak station is characteristic of a receiver’s
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very high-resistance dielectric.
Leakage loss in a transmission line is minimized by using a
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Wavelength is inversely related to frequency.
This is the correct statement concerning a wavelength.
a. Wavelength is inversely related to frequency. b. Wavelength is directly related to frequency. c. Wavelength is determined by the line length. d. Wavelength is expressed in lambdas (λ). |
Through the air in a straight line from transmitter to receiver.
Direct waves are radio waves that travel
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Radio; 15.
When comparing the radio and optical horizons, which one is farther away and by what percentage?
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fidelity.
The ability of a receiver to reproduce the input signal accurately is characteristic of its
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rigid coaxial cable.
A transmission line that consists of a center conductor, placed inside a rigid metal tube that functions as the outer shield, is called
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1.2 meters.
Determine the wavelength of a 250 megahertz (MHz) signal.
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ground waves.
Radio waves that travel near the Earth’s surface are called
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Diffraction.
Which process permits communication in shadow regions behind obstacles?
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