4-59
SMPTE — contd.
Test
Deflection linearity
Method
If the overall height and width of the display’s
active video area match the sizes in the format,
the large circle should be perfectly round. Each
box in the crosshatch pattern should be the same
size and shape. For more information on testing
linearity, please see the discussion on the Linearty
test image.
Test
High contrast resolution
Method
All the 0 and 100% level stripes in all the resolution
patches should be separate and distinct.
Test
Low contrast resolution and noise
Method
All the mid-level 2 on - 2 off stripes in all the
resolution patches should be visible and distinct.
This is a sensitive test for noise in the display’s
video amplifiers.
Test
Quick gamma check
Method
The average brightness level of the small gamma
dither box should match the brightness of the larger
surrounding box. This is a visual check to see if
the display’s gamma correction is producing the
correct mid-level response.
Test
Video gain linearity and gamma
Method
The individual gray-scale boxes all should be at
their indicated levels. A small aperture photometer
is usually required to get accurate and repeatable
readings.
Test
Contrast and brightness check
Method
On a display with properly adjusted brightness
and contrast controls, both the 5% and 95% contrast
boxes should be clearly visible inside their larger
surrounding 0% and 100% boxes.
Содержание 801GC, 801GF, 801GX
Страница 1: ...Owner s and Programmer s Manual Model 801GC 801GF 801GX Portable Video Signal Generators ...
Страница 16: ...xiv Table of Contents Models 801GC 801GF 801GX Rev A Notes ...
Страница 17: ...1 1 Features Product Overview Chapter 1 Introduction ...
Страница 21: ...2 1 Operating Modes Displays Indicators Knobs Switches Buttons Chapter 2 Basic Operation ...
Страница 31: ...3 1 Introduction Format charts Chapter 3 Built In Formats ...
Страница 39: ...4 1 Description of the test images and how to use them Chapter 4 Built In Images ...
Страница 126: ...5 14 Chapter 5 Making Connections Model 801GC 801GF 801GX Rev A Notes ...
Страница 304: ...6 178 Chapter 6 Programming Model 801GC 801GF 801GX Rev A Notes ...
Страница 305: ...7 1 Power on Computer Interfacing If all else fails Chapter 7 Troubleshooting ...
Страница 309: ...8 1 System Errors Format Errors System Error Message Summary Format Error Message Summary Chapter 8 Error Messages ...
Страница 335: ...9 1 Chapter 9 Service New Product Warranty Product Updates Service Agreements Authorized Service Centers ...
Страница 346: ...A 6 Appendix A Specifications Model 801GC 801GF 801GX Rev A Notes ...
Страница 355: ...Notes ...