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Communication Systems

Communication Systems
A buffer amplifier is

None of these
A cathode follower stage
A high gain D.C. amplifier
A double-tuned amplifier

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

100 ohm
1000 ohm
300 ohm
500 ohm

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Communication Systems
If in a broadcasting studio, a 1000 kHz carrier is modulated by an audio signal of frequency range 100-5000 kHz, the width of channel is __________ kHz.

10
5
4.9
995

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Communication Systems
Commercial Frequency deviation of FM is

80 kHz
70 kHz
75 kHz
65 kHz

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Communication Systems
Skip distance depends on time of day and angle of incidence.

True
False

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Communication Systems
What is the purpose of peak clipper circuits in radio transmitters?

To prevent overmodulation
To increase bandwidth
To regulate oscillator I/P voltage
To reduce bandwidth

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