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Communication Systems

Communication Systems
Full duplex operation permits transmission in both directions at the same time.

False
True

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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
Better linearity
The lower modulating power requirement

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Communication Systems
Which of the following is used to generate PDM?

JK flip-flop
Free running multi-vibrator
Monostable multi-vibrator
Schmitt trigger

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

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

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

Low frequency
Medium frequency
Very high frequency
High frequency

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Communication Systems
In TV systems, equalising pulses are sent during

Serrations
Horizontal blanking
Vertical blanking
Horizontal retrace

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