Visual Systems Division
Technical Bulletin
MultiSync
VT440/540 Installation Data
Desktop and Ceiling Mount
Rev. 1.5
Page 1
Contents
Lens Specs, Notes and Formulas
Page 1
Projection Distances and Screen Sizes
Desktop Setup
Page 2
Ceiling Mount Installation
Page 3
Cabinet Dimensions
Top, Backt and Left Side
Page 4
Bottom, Front and Right Side
Page 5
Quick Release Ceiling Mount Dimensions
Page 6
Timing Chart
Page 7
PC Control Codes
Page 8
Lens Specifications
Manual Zoom, Manual Focus
F2.0 – 2.3
f = 35.8 – 43.0 mm
Screen Sizes:
25" - 300" diagonal
Throw Ratio:
Full Wide: 1.90 – 1.96 (see charts)
Full Tele: 2.28 - 2.35 (see charts)
Offset Angle:
Full Wide: 9.01 - 8.72 (see charts)
Full Tele: 7.53 - 7.28 (see charts)
Notes
§
For Screen Sizes of 25 to 300 inches not indicated on the projection tables, use the formulas below.
§
If the figures on the tables do not match the figures in the formulas, use the figures in the table.
§
The ceiling must be strong enough to support the LCD projector and the installation must be in accordance with any local
building codes.
•
All calculations using Screen Diagonal are based on 4:3 aspect ratio.
•
Distances are in inches, for millimeters multiply by 25.4.
•
Distances may vary
±
5%.
Formulas
Units: Inches
(for millimeters multiply final number by 25.4)
D
= Screen Diagonal (4:3)
H
= D x 0.8
H
= Screen Width (4:3)
V
= D x 0.6
V
= Screen Height (4:3)
M
= 1.25H / 0.92205
M
= Projection magnification
C
(Wide) = 1.4516M – 1.715
C
= Horizontal throw distance
C
(Tele) = C (Wide) x 1.2
E
= 0.2165M + 2.476
E
= Vertical distance between projector feet and screen center
D
= 0.0571M – 2.476
D
= Vertical distance between projector feet and screen bottom
B
= 0.2165M
B
= Vertical distance between lens center and screen center
F
= 0.0571M
F
= Vertical distance between lens center and screen top
α
α
(Wide) = tan
-1
(B / C (wide))
α
α
= Throw angle
α
α
(Tele) = tan
-1
(B / C (tele))
