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Communication Systems

Communication Systems
If sampling is done at the rate of 10 kHz. The bandwidth required is

70 kHz
35 kHz
1280 kHz
10 kHz

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

1000 ohm
300 ohm
500 ohm
100 ohm

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Communication Systems
Which of the following is used to generate PDM?

JK flip-flop
Schmitt trigger
Free running multi-vibrator
Monostable multi-vibrator

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Communication Systems
Which of the following is an indirect way of generating FM?

Varactor diode modulator
Reactance FET modulator
Armstrong modulator
Reactance bipolar transistor

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Communication Systems
For attenuation of high frequencies we should use

Series capacitance
Resistance
Inductance
Shunt capacitance

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Communication Systems
A cordless telephone using separate frequencies for transmission in base and portable units is known as

Half duplex arrangement
Neither A nor B
Duplex arrangement
Either A or B

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