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Communication Systems

Communication Systems
For a plate-modulated class C amplifier the plate supply voltage is E. The maximum plate cathode voltage could be almost high as

4E
3E
2E
6E

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

False
True

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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

8 kW
0.5 kW
50 kW
20 kW

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Communication Systems
Which of the following is a digital modulation technique?

PCM
PSK
DM
All

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

Armstrong modulator
Varactor diode modulator
Reactance FET modulator
Reactance bipolar transistor

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Communication Systems
For AM receivers the standard IF frequency is

10.7 MHz
106 kHz
1.07 MHz
455 kHz

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