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B. Mounting and Throw Distance Calculation
Before starting the installation you will need to calculate the projector throw
distance and the ceiling to top-of-picture offset. The throw distance and the
precise center of the screen are then used to determine the exact location for
the physical installation of the projector.
The TransVision
™
’s zoom lens allows for a wide range of throw distance op-
tions — the distance from the projector to the screen. For maximum flexibility
in adjustment we recommend that, where possible, the projector be installed in
the middle range of the possible distances. However, the unit may be installed
at any point within the allowable range.
• To obtain the minimum throw distance, multiply the screen width by 1.41.
• To obtain the maximum throw distance, multiply the screen width by 2.1.
C. Screen Offset
Screen offset is the distance between the top of the picture area of the screen
and the ceiling. This distance is important and it should be calculated before
the screen is installed to ensure proper positioning of the projector in relation
to the screen. Incorrect screen offset may cause image keystone distortion
and cannot be compensated either with the mounting system or electroni-
cally.
The TransVision
™
3E is a 16:9 Projector and is designed to be used with
a 16:9 screen.
• The minimum screen offset is approximately six inches.
• The maximum screen offset can be 40% of the picture height plus six
inches.
• Please refer to our TransVision
™
3E Calculator, under the Customer Sup-
port section at
www.dwin.com
for assistance with calculating these
dimensions.
NOTE:
that the ceiling mounting system enables you to make small adjustments
to the vertical tilt without introducing visible keystone distortion.
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