8.2.6 Analog vs. Digital

Front

What is an analog signal?

Back

An analog signal is a continuous signal that represents physical measurements. Examples include sound waves and light waves.

Front

What is a digital signal?

Back

A digital signal is a discrete signal that represents data as binary values (0s and 1s). Examples include computer data and digital audio.

Front

What is an example of digital signal storage?

Back

Examples include CDs, DVDs, and USB drives.

Front

What is a disadvantage of analog signals?

Back

When copied, the quality of analog signals decreases.

Front

How does an analog signal look like?

Back

An analog signal is represented as a continuous wave.

Front

What is an example of an analog device?

Back

A VHS tape is an example of an analog device.

Front

What is an example of a digital device?

Back

A Blu-Ray DVD is an example of a digital device.

Front

What happens to the quality of an analog signal when it is copied?

Back

The quality goes down when an analog signal is copied.

Front

What are the two main types of signals?

Back

The two main types of signals are analog and digital.

Front

What is the main difference between analog and digital signals?

Back

Analog signals are continuous, while digital signals are discrete.