Question

QUESTION 1

1. A signal containing information will be associated with an infinite bandwidth; however most of the signal’s energy is contained in the effective bandwidth which can be isolated using a passbandRF filter. This is why we call a modulated carrier wave a passband signal.

True

False

10 points   

QUESTION 2

1. If we limit a signals frequency bandwidth too narrowly, we introduce signal distortion.

True

False

10 points   

QUESTION 3

1. What is the difference between a signal amplifier and signal repeater?

		a. an amplifier “amplifies” both signal and noise, while a “repeater” only repeats the digital data, and not the noise
		b. repeaters are only used on digital signals, while amplifiers can be used on both analog as well as digital signals
		c. both a and b are correct
		d. neither a nor b are correct

Answer 1

Q1.True

Bandwidth means the range of frequencies over which most of the signal energy is concentrated.

In modulation techniques,modulated carrier wave carries the message signal over certain range of frequencies so the name pass band signal.

Q2.True

When the signal bandwidth is too small than channel bandwidth , distortion is introduced.

Q3.c both a and b are correct

Repeaters are used in digital communication to repeat the digital signal or to amplify the digital signal where signal strength is very weak

Signal amplifier are used to strengthen the signal (Amplify).