1253 B&K Precision, 1253 Datasheet - Page 13

• Manufacturer Part Number: 1253
• Description: GENERATOR HANDHELD HDTV PATTERN
• Manufacturer: B&K Precision
• Type: NTSC Handheldr

Specifications of 1253

• Patterns: ANSI, Bar, Checker, Crosshatch, Focus, Multiburst, Needle, PLUGE, Raster, Staircase, Window
• Connection Method: BNC, S-Video
• Power Source: 9V Battery
• Equipment Type: NTSC Color Generator
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Description:
The outer rectangle is at 75% gray, with an inner rectangle at 50% (mid) gray. The border of the outer
rectangle occupies 10% of the width and height of the rectangles. Through the center of this border is a
black line at 5%. This simulates the output of a DVD player generating an image area displayed by the
rectangles. The 10% border is 10% of the image width and height, and not of the screen width and height.
Variations:
DVD aspect ratios (1.33:1, 1.78:1, 1.85:1, 2.35:1). These aspect ratios cover 87% of all movies recorded
to DVD media. Read Appendix E: DVD Aspect Ratios for particular movies.
Today's DVD players output one of the following formats:
Pattern Usage:
ratio as seen in a theater, and is normally what is recorded onto film.
Many newer monitors detect the image aspect ratio coming in, from a DVD for example, and digitally
zoom for the best fit. A wide-screen (16:9) TV will display a 1.78 movie to fit the whole screen, a 1.33
movie will have black bands on the left and right, and a 1.85 or 2.35 movie will have black bands on the
top and bottom.
Make sure you see at least the black line around all sides of the screen, which allows up to 5% overscan
on the monitor. If not, you are zoomed in too much, in which case you may need to turn off the auto-fit
function on the TV.
Examples of Uncalibrated Displays:
overscan. The left and right portions of the pattern are cut off. Check to see the auto-zoom function is
turned on, or if the zoom is manually adjustable then set it so the whole pattern is visible.
Too much left-right overscan
720x480 60p (the newer progressive scan DVD), or
720x480 30i (regular NTSC DVD), or
720x576 25i (PAL DVD, in Europe).
Pressing the DVD Aspect Ratio button multiple times, sequences through the most popular
Grayscale rectangles occupying a user selected aspect ratio, on top of a black background.
DVDs output several aspect ratios (width-to-height ratio), which is normally the aspect
The following image indicates a TV with too much horizontal