Diagrams And Distance Charts; Ceiling Mounted - NEC M283X Installation Manual

M283X/M323X/M363X/M403X Installation Guide
Ceiling Mounted and Desktop

Diagrams and Distance Charts

The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of
installation.
Distances are in inches. For millimeters multiply by 25.4.

Ceiling Mounted

Desktop
Distance Chart for popular 4:3 screens
4:3 Screen Formulas:
W = H x 4/3
H = W x 3/4
Screen Diagonal = W x 5/4
Projection Formulas:
B = 0.4875W – 0.156
C (wide) = 1.545W – 1.976
C (tele) = 2.626W – 3.082
D = 0.112W + 0.1726
α (wide) = tanˉ¹ (B/C(wide))
α (tele) = tanˉ¹ (B/C(tele))
Note:
For screen sizes not indicated on the projection
tables, use the formulas on page 1.
www.necdisplay.com
NEC Display Solutions of America, Inc.
Throw D istance
5.43
5.56
Lens Offset F rom
Mount Pipe
3.31
2.38"
Screen Size (4:3)
Diagonal Width(W) Height (H)
inches inches inches
30 24 18
60 48 36
67 54 40.2
72 58 43.2
84 67 50.4
90 72 54
100 80 60
120 96 72
150 120 90
180 144 108
210 168 126
240 192 144
270 216 162
300 240 180
M283X, M323X, M362X, M403X
C
Screen Top
C
Throw D istance
Screen Bottom
B
C
w ide - tele
inches inches
inches
12 35 - 60
23 72 - 123
26 81 - 138
28 87 - 148
33 102 - 173
35 109 - 186
39 122 - 207
47 146 - 249 11
14
58 183 - 312
16
70 221 - 375
19
82 258 - 438
22
93 295 - 501
24
105 332 - 564
27
117 369 - 627
Rev 1.0
Lens C tr
D
B
Screen C tr
Screen C tr
B
D
Lens C tr
D
α
w ide - tele
degrees
3
18.2 - 10.9
6
17.8 - 10.7
6
17.8 - 10.7
7
17.8 - 10.7
8
17.8 - 10.6
8
17.7 - 10.6
9
17.7 - 10.6
17.7 - 10.6
17.6 - 10.6
17.6 - 10.6
17.6 - 10.6
17.6 - 10.6
17.6 - 10.6
17.6 - 10.6
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