NEC MultiSync LT280 Installation Manual

Also see for MultiSync LT280: Specifications Supplementary guide Control commands Control commands User guide

Contents

NEC MultiSync LT280 Installation Manual Manual pdf 1 page image

NEC Solutions (America), Inc.Visual Systems DivisionLT280 Installation GuideCeiling Mounted and Desktop Rev 1.1www.necvisualsystems.com LT280 Page 1 of 6ContentsProduct Description, Lens Specs, Notes and Formulas Pg 1Diagrams & Distance Charts Pg 2Cabinet Dimensions_____________ Pg 3Ceiling Mount Dimensions _________ Pg 4Input Panel and Control Codes Pg 5Product DescriptionType: 3 panel LCD projector, Brightness: LT280: 2500 ANSI Lumens0.7” p-Si TFT w/MLA Dimensions: 12.2”(W) x 10.2”(H) x 4.4”(D)Resolution: LT280: 1024 x 768 Weight: 6.17 lbsLens SpecificationsThrow Ratio: 1.5 – 1.8:1 (for 100” diagonal) Focal Length: 21.69mm – 25.9mmOffset Angle: 9.5° - 12.1° (for 100” diagonal) F/#: 1.7 - 2.0Screen Sizes: 25” - 300” diagonal (4:3) Manual Focus/Manual ZoomNotes For screen sizes not indicated on the projection tables, use the formulas below.If the figures on the tables do not match the results of formulas, use the figures in the table.• All calculations are based on 4:3 aspect ratio.• Distances are in inches, for millimeters multiply by 25.4.• Distances may vary ±5%.FormulasThe Projection Formulas use the image width for calculation. For proper projection placement, determine the image widthfor the desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the width for “W” inthe Projection Formulas.Refer to the diagrams and charts for popular screen sizes on page 2:Definitions: 4:3 Screen Formulas:W = Image Width W = H x 4/3H = Image Height (size) H = W x 3/4B = Vertical distance between lens center and screen center Screen Diagonal = W x 5/4C = Throw distanceD = Vertical distance between lens center and screen top(screen bottom for desktop application)Projection Formulas:B = 0.298WC(wide) = 1.481W - 1.425C (tele)=1.787 – 1.406D = 0.0771Wα(wide) = tan¯¹ (B/C(wide))α (tele) = tan¯¹ (B/C(tele))