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COMMUNICATION SYSTEMS

Communication Systems
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is

Improved efficiency
High power output per transistor
The lower modulating power requirement
Better linearity

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Communication Systems
Leak type bias is used in plate modulated class C amplifier to

Increase the bandwidth
Prevent tuned circuit damping
Prevent over modulation
Prevent excessive grid current

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Communication Systems
FM transmitting and receiving equipment as compared to AM equipment is

Costly
None of these
Cheaper
Almost equally costly

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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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Communication Systems
A modem is classified as low speed if data rate handled is

Upto 250 bps
Upto 600 bps
Upto 400 bps
Upto 100 bps

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