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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

3E
4E
2E
6E

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Communication Systems
It is found that a ship to ship communication suffers from fading. This can be avoided by using

Broad band antenna
Space diversity
Directional antenna
Frequency diversity

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Communication Systems
As per Shannon-Hartley theorem, a noise less Gaussian channel has

Zero capacity
Infinite capacity
Small capacity
None of these

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Communication Systems
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

70.2
113
102.3
80.9

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Communication Systems
For AM receivers the standard IF frequency is

10.7 MHz
455 kHz
1.07 MHz
106 kHz

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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

50 kW
0.5 kW
8 kW
20 kW

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