NEC VT49 User Manual

NEC Display Solutions of America, Inc.
VT49 Installation Guide
Ceiling Mounted and Desktop Rev 1.2
www.necdisplay.com VT49 Page 1 of 6
Contents
Product Description, Lens Specs, Notes and Formulas Pg 1
Diagrams & Distance Charts
Pg 2
Cabinet Dimensions
Pg 3-4
Ceiling Mount Dimensions
Pg 5
Input Panel and Control Codes
Pg 6
Product Description
Type: 3 panel LCD projector, Brightness: 1600 ANSI Lumens
0.6” p-Si TFT w/MLA Dimensions: 12.1”(W) x 10.2”(H) x 4.4”(D)
Resolution: 800 x 600 Weight: 6.17 lbs
Fan Noise: 32 dB / 25dB @ 1 meter
Power Consumption: 205W (max) BTU’s: 699 BTU/hour
Lens Specifications
Throw Ratio: 1.8:1 (for 100” diagonal) Focal Length: 22.4 mm
Offset Angle: 8.4° (for 100” diagonal) F/#: 1.70
Screen Sizes: 25” - 300” diagonal (4:3) Manual Focus/Electronic Zoom
Notes
 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%.
Formulas
The Projection Formulas use the image width for calculation. For proper projection placement, determine the image width
for the desired screen size. Use the Screen Formulas below to calculate all screen dimensions. Plug in the width for “W” in
the 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 4/3
H = Image Height (size) H = W x 3/4
B = Vertical distance between lens center and screen center Screen Diagonal = W x 5/4
C = Throw distance
D = Vertical distance between lens center and screen top
(screen bottom for desktop application)
Projection Formulas:
B = 0.266W
C = 1.813W-0.919
D = 0.108W
α = tan¯¹ (B/C)

NEC VT49 Specifications

General

Brand	NEC
Model	VT49
Category	Projector
Language	English

Summary

Product Description and Specifications

Product Description Details

Details include projector type, resolution, fan noise, power consumption, brightness, dimensions, weight, and BTU's.

Lens Specifications Details

Details include throw ratio, offset angle, screen sizes, focal length, F/#, and focus/zoom type.

Projection Formulas

Definitions for Formulas

Defines terms used in projection calculations such as Image Width (W), Image Height (H), and distances.

Projection Calculation Formulas

Provides formulas for calculating projection dimensions (B, C, D) and angle (a).

Diagrams and Distance Charts

Ceiling Mounted Diagram

Illustrates projector and screen positioning for ceiling installations.

Desktop Diagram

Illustrates projector and screen positioning for desktop installations.

Distance Chart for 4:3 Screens

Provides calculated distances (B, C, D, alpha) for various 4:3 screen sizes.

Cabinet Dimensions Drawings

Side and Top Cabinet Views

Detailed drawings showing side and top cabinet dimensions with key features labeled.

Front and Bottom Cabinet Views

Detailed drawings showing front and bottom cabinet dimensions with ports and levers labeled.

Cabinet Dimensions Continued

Rear and Top Cabinet Views

Drawings showing rear connectivity and top view dimensions with mounting points.

Bottom Cabinet View with Mount Details

Detailed view of the bottom cabinet, indicating lens center and ceiling mount compatibility.

Optional Ceiling Mount Dimensions

VL80CM Mount Top View

Shows the top mounting pattern and dimensions for the VL80CM ceiling mount.

VL80CM Mount Side View

Illustrates the side profile and height dimensions of the VL80CM ceiling mount.

Input Panel and Control Codes

Projector Input Panel Layout

Diagram showing the location and types of input connectors on the projector.

PC Control Codes List

Table listing functions and their corresponding hexadecimal codes for PC control.

Cable Connection Protocol

Details communication protocol, baud rate, data length, parity, and stop bit for PC control.