4-48
Chapter 4: Built-In Images
Model 801GC, 801GF & 801GX¥Rev. X1
/8 /7 /6 /5 /4 /3 /2 1X 2X 3X 4X 5X 6X 7X 8X
5 3 3 1 0 1
Test
Phosphor persistence
Purpose
The phosphors on the face of most CRTs continue
to glow for a short period of time after the electron
b e a m h a s s t o p p e d e n e r g i z i n g t h e m . T h i s
phenomenon is called persistence. A certain amount
of persistence is desirable in most applications. It
prevents a flickering of a displayed image that
most users would find objectionable. On the other
hand, a CRT with an overly long persistence time
causes moving objects to leave a blurred trail.
Method
A flickering in the slower moving boxes indicates
that the combination of refresh rate and phosphor
persistence is not suitable for long-term viewing.
A fading tail left behind by the faster moving boxes
indicates that the display may not be suitable for
viewing animated images.
Summary of Contents for 801GC, 801GF, 801GX
Page 1: ...Owner s and Programmer s Manual Model 801GC 801GF 801GX Portable Video Signal Generators ...
Page 16: ...xiv Table of Contents Models 801GC 801GF 801GX Rev A Notes ...
Page 17: ...1 1 Features Product Overview Chapter 1 Introduction ...
Page 21: ...2 1 Operating Modes Displays Indicators Knobs Switches Buttons Chapter 2 Basic Operation ...
Page 31: ...3 1 Introduction Format charts Chapter 3 Built In Formats ...
Page 39: ...4 1 Description of the test images and how to use them Chapter 4 Built In Images ...
Page 126: ...5 14 Chapter 5 Making Connections Model 801GC 801GF 801GX Rev A Notes ...
Page 304: ...6 178 Chapter 6 Programming Model 801GC 801GF 801GX Rev A Notes ...
Page 305: ...7 1 Power on Computer Interfacing If all else fails Chapter 7 Troubleshooting ...
Page 346: ...A 6 Appendix A Specifications Model 801GC 801GF 801GX Rev A Notes ...
Page 355: ...Notes ...