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Communication Systems

Communication Systems
The maximum power output of a standard A earth station over the total band allocated to satellite communication is about

20 kW
8 kW
50 kW
0.5 kW

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Communication Systems
Commercial Frequency deviation of FM is

75 kHz
65 kHz
70 kHz
80 kHz

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Communication Systems
A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is

15
8
1
16

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Communication Systems
Under ordinary circumstances, impulse noise can be reduced in

FM only
AM only
None of these
Both AM and FM

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Communication Systems
The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?

Gets halved
Gets doubled
Gets increased by 50 percent
Remains unchanged

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Communication Systems
For AM receivers the standard IF frequency is

455 kHz
10.7 MHz
1.07 MHz
106 kHz

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