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Manual abstract: user guide NEC V15SINSTALLTION GUIDE
Detailed instructions for use are in the User's Guide.
[. . . ] NEC Solutions (America), Inc.
Visual Systems
VT470/570/575/670/676 Installation Guide
Ceiling Mounted and Desktop Contents
Product Description, Lens Specs, Notes and Formulas Diagrams and Distance Charts Cabinet Dimensions Ceiling Mount Dimensions Input Panel and Control Codes Pg. [. . . ] Image width is the same for all aspect ratios, only vertical image size varies. For proper projector placement, determine the image width for a desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the image width for "W" in the Projection Formulas. Refer to the diagrams and charts for popular screen sizes on page 2. Definitions: W = Image Width H = Image Height (Size) B = Vertical distance between lens center and screen center C = Throw distance D = Vertical distance between lens center and screen top (screen bottom for desktop) = Projection angle Projection Formulas: B = 0. 2986W C (wide) = 1. 4813W 1. 425 C (tele) = 1. 7913W 1. 406 D = 0. 0764W -1 (wide) = tan (B/C(wide)) -1 (tele) = tan (B/C(tele)) 4:3 Screen Formulas: W = H x 4/3 H = W x 3/4 Screen Diagonal = W x 5/4
www. necvisualsystems. com
VT470/570/575/670/676
Page 1 of 6
Diagrams and Distance Charts
The following diagrams show the relationship between projector position and the screen. For millimeters multiply by 25. 4.
Ceiling Mounted
Screen Top D Lens Ctr
B
C Throw Distance
6. 1" 5. 5"
Screen Ctr
Lens Offset from Mount Pipe
2. 7"
Desktop
Screen Ctr
B
C Throw Distance
Lens Ctr Screen Bottom
D
2. 5"
Distance chart for popular 4:3 screens
Screen Size (4:3) Diag 21 60 72 84 90 100 120 150 180 200 250 300 W 16. 8 48 57. 6 67. 2 72 80 96 120 144 160 200 240 H
inches inches inches
B
inches
C wide - tele
inches
D
inches
wide - tele
degrees
Note: For screen sizes not indicated on the chart, use the formulas on page 1. Note: "NA" means it is outside lens range for that part of the zoom. [. . . ] NOTE 2: For long cable runs it is recommended to set communication speed within projector menus to 9600 bps.
www. necvisualsystems. com
VT470/570/575/670/676
Page 6 of 6 [. . . ]
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