Question 1

When analyzing the video signal on a waveform monitor, the view of the signal can be changed and certain parts enlarged.

Accepted Answer

That is correct. Waveform monitors allow the user to change the view and zoom in on specific parts of the video signal for analysis.

Question 2

Active video when viewed as luminance only occupies the range between 7.5 and 1000 units or IRE.

Accepted Answer

Active video in terms of luminance typically occupies the range from 0 to 100 IRE in a standard video signal, where 0 IRE represents black, and 100 IRE represents white. The 7.5 IRE setup level, often referred to as "pedestal" in NTSC video, is used for black level, not the entire active video range.

Question 3

Because some of the color information on a normal color bar display would be beyond the waveform monitor's measuring limits, a color bar signal reduced to 75% of true levels is the general standard in use.

Accepted Answer

This is true. A reduced color bar signal at 75% is used to ensure that all color information falls within the measuring limits of the waveform monitor.

Question 4

The horizontal sync pulse should be at the -40 units line.

Accepted Answer

This statement is true as the horizontal sync pulse is typically located at the 40 units (or -40 units) line on a video waveform monitor.

Question 5

The Low Pass filter on a waveform monitor (LPASS) selects the luminance portion of the signal only.

Accepted Answer

The Low Pass filter (LPASS) on a waveform monitor is used to filter out the high frequency components of the signal, such as the color information, allowing only the lower frequency luminance (brightness) information to be displayed. This helps in analyzing the luminance levels of the video signal without the interference of color information.

Question 6

Waveform monitors and vectorscopes are both measuring tools also known&#10;A) oscillators&#10;B) oscilloscopes&#10;C) zoetropes&#10;D) none of the above

Accepted Answer

Waveform monitors and vectorscopes are types of oscilloscopes used in video production and broadcasting. Oscillators and zoetropes are not relevant measuring tools in this context.

Question 7

In front of the CRT of a scope is a glass or plastic plate made up of vertical and horizontal lines used to measure the video signal. This plate is called the&#10;A) scale&#10;B) face&#10;C) target&#10;D) graticule

Accepted Answer

The plate made up of vertical and horizontal lines that is used to measure the video signal in front of the CRT of a scope is called the graticule.

Question 8

The scale on a waveform monitor that ranges from -40 to 100 IRE was referred to as how many volts of peak-to-peak video?&#10;A) One&#10;B) 1/1000&#10;C) 3.58 volts&#10;D) 100

Accepted Answer

The scale from -40 to 100 IRE on a waveform monitor represents one volt of peak-to-peak video signal in analog video systems.

Question 9

The horizontal line at zero units on a waveform monitor is referred to as the&#10;A) zero line&#10;B) base line&#10;C) unit line&#10;D) timing line

Accepted Answer

The horizontal line at zero units on a waveform monitor is called the baseline. This is because it represents the starting point from which all other peaks and troughs in the waveform are measured.

Question 10

The horizontal line at zero units is marked with vertical divisions in&#10;A) milliseconds&#10;B) microseconds&#10;C) tenths of microseconds&#10;D) both B and C

Accepted Answer

The question implies that the division markings are very fine, which suggests that the unit of time being used is very small. Both microseconds and tenths of microseconds are suitable for such fine divisions, and since the question doesn't specify between the two, either answer is correct.

Deck 8: Signal Monitoring