Question 1

What is the major characteristic of a digital signal?&#10;A) it consists of on/off pulses represented by 0's and 1's&#10;B) it fluctuates opposite the original signal&#10;C) it is interlaced&#10;D) it is progressive&#10;E) it is lossless

Accepted Answer

A digital signal consists of a series of on/off pulses represented by 0's and 1's, which distinguishes it from an analog signal that is continuous and variable.

Question 2

What is the major characteristic of an analog signal?&#10;A) it must be amplified before it can be transported&#10;B) it must be coded&#10;C) it fluctuates exactly like the original signal&#10;D) it fluctuates similar to the original signal&#10;E) it consists of 0's and 1's

Accepted Answer

An analog signal fluctuates exactly like the original signal.

Question 3

What three colors are used in televisions?&#10;A) black, white, and yellow&#10;B) magenta, yellow, and cyan&#10;C) red, green, and blue&#10;D) yellow, red, and blue&#10;E) white, gray, and black

Accepted Answer

Televisions use a color system called RGB (red, green, blue), in which these three primary colors are combined to create all other colors on the screen.

Question 4

What is the correct order of digitization steps?&#10;A) sampling, quantizing, anti-aliasing, coding&#10;B) quantizing, sampling, anti-aliasing, coding&#10;C) coding, quantizing, sampling, anti-aliasing&#10;D) anti-aliasing, sampling, quantizing, coding&#10;E) coding, anti-aliasing, sampling, quantizing

Accepted Answer

The correct order of digitization steps is anti-aliasing, sampling, quantizing, and coding. Anti-aliasing filters are used to limit the bandwidth of the signal to satisfy the Nyquist criterion and prevent aliasing. Sampling is the process of converting a signal from continuous to discrete time by taking samples at discrete time intervals. Quantizing is the process of mapping the amplitude of samples to discrete values. Coding is the process of representing the quantized values with binary code.

Question 5

Which system scans all lines in successive order?&#10;A) interlaced&#10;B) digital&#10;C) compression&#10;D) lossy&#10;E) progressive

Accepted Answer

Progressive scanning is the system that scans all lines in successive order.

Question 6

Which of the following ATSC systems is similar to the old analog TV system?&#10;A) 480p&#10;B) 720i&#10;C) 720p&#10;D) 1080i&#10;E) 1080p

Accepted Answer

480p is similar to the old analog TV system in terms of resolution. It is considered standard definition (SD), which is closer to the resolution of older analog TV systems compared to the higher resolutions of 720p, 1080i, and 1080p, which are considered high definition (HD).

Deck 5: Analog and Digital Television