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If a signal is defined only at specific instants of time, then it is known as a ________ signal.

• Continuous time

• Analog

• Digital

• Discrete time

If a signal is defined for all instants of time, then it is known as a ________ signal.

• Continuous time

• Analog

• Digital

• Discrete time

The sample and hold circuit generates _____ waveform.

• PAM

• FM

• PCM

• AM

A minimum sampling rate is ___ times the highest frequency component or upper bandwidth limit of the analog signal as per the sampling theorem.

• 4

• 3

• 2

• Many

Identify the type of sampling.

• Flat-topped sampling

• Natural sampling

• Instantaneous sampling

Identify the type of modulation.

• PAM

• PWM

• PPM

• PCM

process of putting the message into a symbolic, electrical form

• sender

• encoding

• message

• media

Although digital representations are discrete, the information represented can be sounds, images, and other measurements of continuous systems.

• True

• False

• Maybe

• Not Applicable

_______is the transmission of digital pulses between two or more points in a communication system

• data communication

• digital radio

• data transmission

• digital transmission

The average probability of a _____ at the output of the decoder is a measure of the performance of the demodulator–decoder combination

• bit-rate

• bit-error

• impairment

• encryption