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PRE-INSTALLATION PLANNING
Before starting the installation you will need to calculate the projector throw distance and the ceiling to
picture-start 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.
Throw Distance Calculation
The TransVision
™
3’s zoom lens allows for a wide range of throw distance options – 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.
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 electronically.
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 Lens
Shift Adjustment on Page 20.
Please refer to our TransVision
™
3 Calculator, under the Software section at www.dwin.com for
assistance with calculating these dimensions.
Throw Distance
O
H
W
Screen
Off Set
Screen Width
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