For screen sizes not indicated on the projection charts, use the formulas below.
If a value in a chart does not match the results of the formulas, use the values in the chart.
The ceiling must be strong enough to support the projector and the installation must be in accordance with any local
building codes.
All formulas are based on a 4:3 aspect ratio and screen.
4:3 sources can be displayed on a 16:9 screen without vertical “squeezing”, see “Aspect Ratio” in the user manual.
Distances are in inches, for millimeters multiply by 25.4.
Distances may vary ±5%.
Formulas (for a 4:3 screen)
units: inches (for millimeters multiply final number by 25.4)
Calculate projection values by plugging the screen width (H) into the projection formulas.
Projection Formulas:
B = 0.3023H H = Horizontal Screen Width (4:3)
C (wide) = 1.5165H – 1.357 V = Vertical Screen Height (4:3)
C (tele) = 1.8197H – 1.629 B = Vertical distance between lens center and screen center
D = 0.0727H C = Throw distance
α (wide) = tan
α (tele) = tan
Screen Formulas (4:3):H = V x 4/3
V = H x 3/4
Screen Diagonal = H x 5/4
-1
-1
www.necvisualsystems.com Page 1 of 7
Definitions:
(B/C(wide)) α = Throw Angle
(B/C(tele))
Page 2
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Page 4
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Page 6
Page 7
Page 2
Ceiling Mounted Installation
The following diagram shows the relationship between projector position and the screen. Refer to the chart below for data.
Distances are in inches. For millimeters multiply by 25.4.
C
4.9"
Throw Distance
Screen Top
Lens Ctr
D
*6.5" w/pipe connector
*5.6" w/ceiling plate
α
B
Lens Offset from
Screen Ctr
Mount Pipe
2.8"
*See page 6 for mount details
Distance Chart (for popular screen sizes)
Note: For screen sizes not indicated on the chart, use the formulas on page 1.
DiagonalWidth(H)Height(V)wide - telewide - tele
www.necvisualsystems.com Page 2 of 7
Screen Size (4:3)C
inchesinchesinchesinchesinches
BD
inches
α
degrees
2116.812.65.1NA - 28.91.2NA - 10.0
4032249.747.2 - 56.62.311.6 - 9.7
60483614.571.4 - 85.73.511.5 - 9.6
6753.640.216.279.9 - 95.93.911.5 - 9.6
7257.643.217.486.0 - 103.24.211.4 - 9.6
8467.250.420.3100.6 - 120.74.911.4 - 9.6
90725421.8107.8 - 129.45.211.4 - 9.5
100806024.2120.0 - 143.95.811.4 - 9.5
120967229.0144.2 - 173.17.011.4 - 9.5
1501209036.3180.6 - 216.78.711.4 - 9.5
18014410843.5217.0 - 260.410.511.3 - 9.5
21016812650.8253.4 - 304.112.211.3 - 9.5
24019214458.0289.8 - 347.814.011.3 - 9.5
27021616265.3326.2 - 391.415.711.3 - 9.5
30024018072.6362.6 - 435.117.411.3 - 9.5
Page 3
Desktop Setup
The following diagram shows the relationship between projector position and the screen. Refer to the chart below for data.
Distances are in inches. For millimeters multiply by 25.4.
C
Screen Ctr
B
Throw Distance
α
2.3"
Projector Feet
Lens Ctr
Scrn Bottom
D
Distance Chart (for popular screen sizes)
Note: For screen sizes not indicated on the chart, use the formulas on page 1.
DiagonalWidth(H)Height(V)wide - telewide - tele
Screen Size (4:3)C
inchesinchesinchesinchesinches
BD
inches
2116.812.65.1NA - 28.91.2NA - 10.0
4032249.747.2 - 56.62.311.6 - 9.7
60483614.571.4 - 85.73.511.5 - 9.6
6753.640.216.279.9 - 95.93.911.5 - 9.6
7257.643.217.486.0 - 103.24.211.4 - 9.6
8467.250.420.3100.6 - 120.74.911.4 - 9.6
90725421.8107.8 - 129.45.211.4 - 9.5
100806024.2120.0 - 143.95.811.4 - 9.5
120967229.0144.2 - 173.17.011.4 - 9.5
1501209036.3180.6 - 216.78.711.4 - 9.5
18014410843.5217.0 - 260.410.511.3 - 9.5
21016812650.8253.4 - 304.112.211.3 - 9.5
24019214458.0289.8 - 347.814.011.3 - 9.5
27021616265.3326.2 - 391.415.711.3 - 9.5
30024018072.6362.6 - 435.117.411.3 - 9.5
α
degrees
www.necvisualsystems.com Page 3 of 7
Page 4
Cabinet Dimensions
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
0
5
.
3
9
0
.
6
9
6
.
4
4
6
.
1
8
1
.
2
www.necvisualsystems.com Page 4 of 7
1.641.86
3
5
.
0
3
8
.
3
9
.
6
2
.
2
9
8
.
2
1
3
.
9
2
1
1
2
.
2
1
Page 5
Cabinet Dimensions (continued)
The following drawings show the cabinet dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
(VT460/465/560/660/660K)
4
5
.
1
7
7
.
1
2
1
.
5
1.6
9
4.9
2
M4*MAX8
For Mount
www.necvisualsystems.com Page 5 of 7
Rear View
Rear View
(VT46)
N
E
C
A
C
I
N
`
V
I
N
I
D
E
O
R
A
L
U
/
M
D
O
I
O
N
O
L
A
/
M
U
O
D
R
N
I
O
O
S
I
-
N
V
£
I
D
E
O
A
U
D
I
O
R
G
B
I
N
P
C
C
O
N
T
R
O
L
Page 6
Optional Ceiling Mount Dimensions (Model #: VT60CM)
The following drawings show ceiling mount dimensions.
Dimensions are in inches. For millimeters multiply by 25.4.
The VT60CM comes with a threaded pipe connector and a ceiling plate for flush mounting and minimal height.
Baud Rate: 19200 bps
Data Length: 8 bits
Parity: No Parity
Stop Bit: One bit
X on/off: None
Communications: Full duplex
PC Control Connector (DIN-8P)
To RxD of PC
678
345
12
To GND of PC
NOTE 1: Pins 2, 3, 5, 6 and 8 are used inside the projector.
NOTE 2: For long cable runs it is recommended to set communication speed within projector menus to 9600 bps.
To TxD of PC
www.necvisualsystems.com Page 7 of 7
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