Digital Projection Titan Xg-500 User Manual

Rev B 02/2007  Page 2.1
2. Installation
Contents
Screen requirements ......................................................................................................................... 2.2
Aspect ratio ...................................................................................................................................... 2.2
Fitting the image to the DMD ............................................................................................................. 2.2
Images displayed...

Page 2.2 Rev B 02/2007
2. Installation  Digital Projection TITAN XG-500 User Manual
Notes
  The images are shown here 
scaled automatically by the 
projector.
  The image may be scaled 
differently if the Aspect Ratio is 
set differently in the Picture or 
Geometry menus.
full height = 768 pixels
5:4 = 1.25 = 960 pixels
4:3 = 1.33:1 = 1024 pixels
(native resolution)
Screen requirements
Aspect ratio
Fitting the image to the DMD
If the source image supplied to the projector is smaller than 1024 x 768...

Rev B 02/2007 Page 2.3
Digital Projection TITAN XG-500 User Manual  2. Installation
 Diagonal screen sizes
Screen sizes are sometimes specifi ed by their diagonal size (D) in inches. When 
dealing with large screens and projection distances at different aspect ratios, it is 
more convenient to measure screen width (W) and height (H).
The example calculations below show how to convert diagonal sizes in inches into 
width and height, at various aspect ratios.
2.35:1 (Scope)
W = D x 0.92in  (D x .023m) H = D...

Page 2.4 Rev B 02/2007
2. Installation  Digital Projection TITAN XG-500 User Manual
Fitting the image to the screen
It is important that your screen is of suffi cient height and width to display images at 
all the aspect ratios you are planning to use.
Use the conversion chart, or the sample calculations below to check that you are 
able to display the full image on your screen. If you have insuffi cient height or width, 
you will have to reduce the overall image size in order to display the full image on...

Rev B 02/2007 Page 2.5
Digital Projection TITAN XG-500 User Manual  2. Installation
Positioning the screen and projector
For optimum viewing, the screen should be a fl at surface perpendicular to the fl oor. 
The bottom of the screen should be 1.2m (4 feet) above the fl oor and the front row 
of the audience should not have to look up more than 30° to see the top of the 
screen.
The distance between the front row of the audience and the screen should be at 
least twice the screen height and the distance...

Page 2.6 Rev B 02/2007
2. Installation  Digital Projection TITAN XG-500 User Manual
Notes
  For more information about 
Throw ratio factor (TRF), see 
Useful lens calculations, later 
in this section.
Choosing a lens
A number of lenses are available for use with the projector. Which lens you choose 
will depend on the screen size, image aspect ratio, projection distance and light 
output.
The lenses available and their part numbers are listed below:
0.8 : 1 fi xed lens    001-734
1.2 : 1 fi xed lens...

Rev B 02/2007 Page 2.7
Digital Projection TITAN XG-500 User Manual  2. Installation
Notes
  This chart has a TRF of 1.0, for 
use with the following images:
Choosing a lens using the lens charts
Use the charts on this page and on the following pages to choose which lens best 
suits your application.
Full width images, including 2.35:1, 1.85:1, 16:9, 1.66:1, 4:3
example
For a screen width of 5m at a distance of 13m, the 1.8 - 2.4: 1 zoom lens would 
be best suited.
For the same screen size at a distance...

Page 2.8 Rev B 02/2007
2. Installation  Digital Projection TITAN XG-500 User Manual
Notes
  This chart has a TRF of 1.07, 
for use with the following image:
5:4 = 1.25:1
Lens charts continued
Full height image 5:4
Use the chart below to choose which lens best suits your application.
if you need to be more precise, then use the calculations on the page immediately 
following the lens charts.
feet
metres Screen width
                      5                   10                   15                  20...

Rev B 02/2007 Page 2.9
Digital Projection TITAN XG-500 User Manual  2. Installation
Notes
  The Throw ratio for a particular 
lens is fi xed, and assumes that 
the image fi lls the width of the 
DMD.
  For images that do not fi ll the 
width of the DMD, the Throw 
ratio is effectively increased. To 
correct for this, a Throw Ratio 
Factor (TRF) is used.
  The lenses available and their 
part numbers are listed below:
0.8 : 1 fi xed lens 001-734
1.2 : 1 fi xed lens 001-735
1.5 - 1.8 : 1 zoom lens 001-736
1.8 -...

Page 2.10 Rev B 02/2007
2. Installation  Digital Projection TITAN XG-500 User Manual
Notes
  The Throw ratio for a particular 
lens is fi xed, but assumes that 
the image fi lls the width of the 
DMD.
  For images that do not fi ll the 
width of the DMD, the Throw 
ratio is effectively increased. To 
correct for this, a Throw Ratio 
Factor (TRF) is used.
  Lens extension is measured 
when the lens is focused at 
infi nity, and fully extended. 
At other focus settings, the 
extension could be up to 10mm...