Selecting Image - Quantum Data 881 User Manual

Selecting image

882 Video Test Instrument User Guide (Rev A.35)
Component high definition television formats
Component high definition television formats, like the standard definition television
formats, are named by their vertical resolution, scanning method, and frame rate. These
formats are applicable in the case of RGB, YPbPr, and YCbCr. These initial characters
indicating the resolution are followed by the scanning method. The two characters
following the scanning method indicate the frame rate. A typical example of a component
high definition TV video format is:
• 1080i30 (for a vertical resolution of 1080 active vertical lines with interlaced scanning
and a 30 Hz frame refresh rate).
Computer display formats
Computer display formats are assumed to use progressive scanning. Computer display
format names consist of four blocks. The initial three characters indicate the vendor ID
using the EISA ID (for example, IBM, SUN, and VSC) or the standard body or acronym
(for example, SMT, DMT, GTF, CEA, and EIA). The next two characters provide the first
two digits of the horizontal resolution in pixels. Following the horizontal resolution are two
characters which indicate the frame rate. The final character indicates the aperture, which
is used only if the aperture is not 1.33 (A). The following are examples of computer display
formats:
• VSC1275 for Viewsonic 1280 by 1024 at 75 Hz
• DMT0685 for Discrete Monitor Timing with 680 by 480 at 85 Hz
Viewing or modifying format parameters
You can use the Format image to view detailed information about formats in the 882.
You can also modify format parameters through the front panel, through the command line
interface, or through the Format Editor. These procedures are provided in
format parameters" on page 177.
Once you have determined the format or formats appropriate for testing the display, you
will apply a series of images suitable for evaluating the display. Of primary importance is
determining what type of display you are testing (for example, CRT or digital flat panel
display). You must also determine if you are testing composite TV and use images
appropriate for these formats and video types.
Each image in the 882's library is intended to test one or more attributes of a particular
display type and video type.
Rendering images
Use the following procedures to view primary images.
"Configuring
47