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Communication Systems

Communication Systems
For a given carrier wave, maximum undistorted power is transmitted when value of modulation is

1
0.8
0.5

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Communication Systems
To eliminate ghosts in the picture

Twist the transmission line
Connect a booster
Use a longer transmission line
Change the antenna orientation of location

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Communication Systems
Full duplex operation permits transmission in both directions at the same time.

False
True

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Communication Systems
In EM waves, polarization

Is due to transverse nature of waves
Is always vertical in an isotropic medium
Is caused by reflection
Results from longitudinal nature of waves

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Communication Systems
The characteristic impedance of a twin wire feeder used for TV signals is about

1000 ohm
300 ohm
100 ohm
500 ohm

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Communication Systems
The maximum power output of a standard A earth station over the total band allocated to satellite communication is about

20 kW
50 kW
8 kW
0.5 kW

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