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Communication Systems

Communication Systems
The frequency range of 300 kHz to 3000 kHz is known as

High frequency
Very high frequency
Medium frequency
Low frequency

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Communication Systems
In Modulation, “carrier” is

Resultant wave
Voltage for which frequency, phase or amplitude is varied
Voltage with constant frequency, phase or amplitude
Speech voltage to be transmitted

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Communication Systems
VSB modulation is preferred in TV because

It results in better reception
None of these
It avoids phase distortion at low frequencies
It reduces the bandwidth requirement to half

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Communication Systems
PAM stands for

Pulse Amplitude Modulation
Phase Analogue Modulation
Phase Amplitude Modulation
Pulse Analogue Modulation

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

Varactor diode modulator
Reactance bipolar transistor
Reactance FET modulator
Armstrong modulator

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Communication Systems
SSB can be generated by

Good attenuation characteristics
All of these
Filter method
Phase cancellation method

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