Appendix A - Get the most from your unit
The aim of this section is to help you exploit some of th ese applicat ions an d functions to
get the best possible results from your unit.
Hints & Tips
1. Use S-Video in preference to Composite Video, if your equipment has such an
input. S-Video keeps the color and brightness in a video signal separate,
whereas composite video requires extra filters to separate them electronically -
these filters degrade the image.
2. Don't forget the ZOOM. If you have problems reading the small text, then
selecting the ZOOM mode will make things much easier, especially if using the
Composite Video output. This is particularly useful for presentations.
3. Zoom modes may require a different Flicker Reduction setting. Lowering the
Flicker Reduction value may help to increase legibility of small text.
4. The lower the graphics resolution and refresh rate, the better the image quality.
All scan converters store the computer image to be converted to video in their
own internal memory, and to do so the computer image has to be 'sampled'
many times during each scan-line. Each sample stores one pixel of information
in the memory. The number of samples taken is proportional to the image
quality - i.e. the more samples the better. Higher graphic resolutions take less
time to display each scan-line than lower ones, so it means that there will be
more samples per line for lower resolution modes because there's more time for
more samples to be taken - and hence will give a better image quality.
5. The lower the graphics resolution, the better the 'vertical' image quality. Video
monitors have a fixed number of lines available for displaying pictures - for
PAL it is 576, for NTSC it is 480, although some of these are off the top and
bottom edges of the screen. So the more scan-lines a graphics resolution has
(e.g.. an 800x600 resolution has 600 scan-lines), the more difficult it is for your
unit to squeeze all these lines into the limited number available on the monitor.
So lowering your graphic resolution will help improve image quality.
(Remember to run AutoSet after you change the resolution)
6. Cables and Connectors. Using good quality cables and connectors with your unit
and ensure that all connectors are properly connected to help maintain a high
picture quality.
7. Designing your Display or Presentation. When setting up an image for display
or putting together your presentation, keep in mind that people might have to
view it from a distance. Using a font that is well defined, graphics and pictures
that are uncluttered will all add to the legibility of your display or presentation.
43
B
o
th
v
e
rs
io
n
s
