NEC VT440K Installation Data

Visual Systems Division
Technical Bulletin
MultiSync VT440/540 Installation Data
Desktop and Ceiling Mount
Contents
Lens Specs, Notes and Formulas
Projection Distances and Screen Sizes
Desktop Setup
Ceiling Mount Installation
Cabinet Dimensions
Top, Backt and Left Side
Bottom, Front and Right Side
Quick Release Ceiling Mount Dimensions
Timing Chart
PC Control Codes
Lens Specifications
Manual Zoom, Manual Focus
Screen Sizes:
Throw Ratio:
Offset Angle:
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
V = D x 0.6
M = 1.25H / 0.92205
C (Wide) = 1.4516M – 1.715
C (Tele) = C (Wide) x 1.2
E = 0.2165M + 2.476
D = 0.0571M – 2.476
B = 0.2165M
F = 0.0571M
-1
(Wide) = tan (B / C (wide))
-1
(Tele) = tan (B / C (tele))
Rev. 1.5
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F2.0 – 2.3 f = 35.8 – 43.0 mm
25" - 300" diagonal
Full Wide: 1.90 – 1.96 (see charts)
Full Wide: 9.01 - 8.72 (see charts)
H = Screen Width (4:3)
V = Screen Height (4:3)
M = Projection magnification
C = Horizontal throw distance
E = Vertical distance between projector feet and screen center
D = Vertical distance between projector feet and screen bottom
B = Vertical distance between lens center and screen center
F = Vertical distance between lens center and screen top
= Throw angle
Full Tele: 2.28 - 2.35 (see charts)
Full Tele: 7.53 - 7.28 (see charts)
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