NEC Display Solutions of America, Inc.
M283X/M323X/M363X/M403X Installation Guide
Ceiling Mounted and Desktop
Rev 1.0
www.necdisplay.com
M283X, M323X, M362X, M403X
Page 2 of 6
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.
Diagonal Width(W) Height (H)
inches
inches
inches
inches
30
24
18
12
35
-
60
18.2
-
10.9
60
48
36
23
72
-
123
17.8
-
10.7
67
54
40.2
26
81
-
138
17.8
-
10.7
72
58
43.2
28
87
-
148
17.8
-
10.7
84
67
50.4
33
102
-
173
17.8
-
10.6
90
72
54
35
109
-
186
17.7
-
10.6
100
80
60
39
122
-
207
17.7
-
10.6
120
96
72
47
146
-
249
17.7
-
10.6
150
120
90
58
183
-
312
17.6
-
10.6
180
144
108
70
221
-
375
17.6
-
10.6
210
168
126
82
258
-
438
17.6
-
10.6
240
192
144
93
295
-
501
17.6
-
10.6
270
216
162
105
332
-
564
17.6
-
10.6
300
240
180
117
369
-
627
17.6
-
10.6
Screen Size (4:3)
3
inches
B
C
w ide - tele
inches
27
degrees
D
α
w ide - tele
6
6
7
8
8
9
11
14
16
19
22
24
B
C
Lens Ctr
Screen Ctr
Throw Distance
Screen Bottom
2.38"
C
Throw Distance
Screen Top
Lens Offset From
Mount Pipe
D
B
Lens Ctr
Screen Ctr
D
5.43
5.56
3.31
